MEDSI2023 - List of Keywords (synchrotron)

Paper	Title	Other Keywords	Page
TUOAM04	New Developments and Status of XAIRA, the New Microfocus MX Beamline at the ALBA Synchrotron	detector, optics, cryogenics, experiment	5
	N. González, C. Colldelram, A. Crisol, D. Garriga, J. Juanhuix, J. Nicolàs, M. Quispe, I. Šics ALBA-CELLS, Cerdanyola del Vallès, Spain
	The new BL06-XAIRA microfocus macromolecular crystallography beamline at ALBA synchrotron is currently under commissioning and foreseen to enter into user operation in 2024. The aim of XAIRA is to provide a 4-14 keV, stable, high flux beam, focused to 3×1 µm2 FWHM. The beamline includes a novel monochromator design combining a cryocooled Si(111) channel-cut and a double multilayer diffracting optics for high stability and high flux; and new mirror benders with dynamical thermal bump and figure error correctors. In order to reduce X-ray parasitic scattering with air and maximize the photon flux, the entire end station, including sample environment, cryostream and detector, is enclosed in a helium chamber. The sub-100nm SoC diffractometer, based on a unique helium bearing goniometer also compatible with air, is designed to support fast oscillation experiments, raster scans and helical scans while allowing a tight sample to detector distance. The beamline is also equipped with a double on-axis visualization system for sample imaging at sub-micron resolutions. The general status of the beamline is presented here with particular detail on the in-house fully developed end station design.
	Slides TUOAM04 [6.526 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM04
About •	Received ※ 27 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 15 May 2024
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TUOAM05	Thermal-Deformation-Based X-Ray Active Optics Development in IHEP	optics, vacuum, radiation, synchrotron-radiation	10
	F.G. Yang, D.Z. Diao, H. Dong, J. Han, M. Li, W.F. Sheng, S.F. Wang, X.W. Zhang IHEP, Beijing, People’s Republic of China L. Kang IHEP CSNS, Guangdong Province, People’s Republic of China
	Funding: National Natural Science Foundation of China (11505212, 11875059); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2019012). Advanced light source require small wavefront distortion to maintain the quality of the X-ray beam. Active optical wavefront correction technology is a very important solution to solve the service problems of ultra-precise devices under such conditions. In this paper, we will report our recent progress on this active optics system development including surface metrology and mirror modulation. Based on the research of laser-heating-based thermal deformation modulation technology, this project proposes to modify the mirror surface of X-ray mirrors based on semiconductor microfabrication process, and modulate the local deformation of the mirror surface by electric heating to realize the surface shape correction /modulation of X-ray mirrors. Since the modulation unit acts directly on the reflective region of the mirror surface, it has a better surface shape correction capability than the conventional body deformation modulation. The solution also has the advantage of high efficiency and low cost. *Yang F, Li M, Gao L, et al. Laser-heating-based active optics for synchrotron radiation applications[J]. Optics Letters, 2016, 41(12): 2815-2818.
	Slides TUOAM05 [18.205 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM05
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 February 2024
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TUOBM02	SAPOTI - The New Cryogenic Nanoprobe for the CARNAÚBA Beamline at Sirius/LNLS	cryogenics, controls, vacuum, focusing	19
	R.R. Geraldes, G.G. Basilio, D.N.A. Cintra, V.B. Falchetto, D. Galante, R.C. Gomes, A.Y. Horita, L.M. Kofukuda, F.R. Lena, M.B. Machado, Y.A. Marino, E.O. Pereira, P.P.R. Proença, C.A. Pérez, M.H. Siqueira da Silva, A.P.S. Sotero, V.C. Teixeira, H.C.N. Tolentino LNLS, Campinas, Brazil
	Funding: Brazilian Ministry of Science, Technology and Innovation (MCTI) SAPOTI will be the second nanoprobe to be installed at the CARNAÚBA (Coherent X-Ray Nanoprobe Beamline) beamline at the 4th-generation light source Sirius at the Brazilian Synchrotron Light Laboratory (LNLS). Working in the energy range from 2.05 to 15 keV, it has been designed for simultaneous multi-analytical X-ray techniques, including absorption, diffraction, spectroscopy, fluorescence and luminescence, and imaging in 2D and 3D. Highly-stable fully-coherent beam with monochromatic flux up to 10¹¹ph/s/100mA-/0.01%BW and size between 35 and 140 nm is expected with an achromatic KB (Kirkpatrick-Baez) focusing optics, whereas a new in-vacuum high-dynamic cryogenic sample stage has been developed aiming at single-nanometer-resolution images via high-performance 2D mapping and tomography. This work reviews and updates the entire high-performance mechatronic design and architecture of the station, as well as the integration results of its several modules, including automation, thermal management, dynamic performance, and positioning and scanning capabilities. Commissioning at the beamline is expected in early 2024.
	Slides TUOBM02 [45.929 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM02
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 11 February 2024
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TUOBM06	MINERVA, a New X-ray Facility for the Characterization of the ATHENA Mirror Modules at the ALBA Synchrotron	vacuum, optics, detector, MMI	28
	A. Carballedo, J.J. Casas, C. Colldelram, A. Crisol, G. Cuní, D. Heinis, J. Nicolàs, A. Sánchez, N. Valls Vidal ALBA-CELLS, Cerdanyola del Vallès, Spain N. Barrière, M.J. Collon, G. Vacanti Cosine Measurement Systems, Warmond, The Netherlands M. Bavdaz, I. Ferreira ESA-ESTEC, Noordwijk, The Netherlands L. Cibic, M. Krumrey, D. Skroblin PTB, Berlin, Germany
	Funding: MINERVA is funded by the European Space Agency (ESA) and the Spanish Ministry of Science and Innovation. In this paper we present the newly built beamline MINERVA, an X-ray facility at the ALBA synchrotron. The beamline has been designed to support the development of the X ray observatory ATHENA (Advanced Telescope for High Energy Astrophysics). MINERVA will host the necessary metrology equipment to integrate the stacks produced by cosine in a mirror module (MM) and characterize their optical performances. The optical and mechanical design is based on the XPBF 2.0 from the Physikalisch-Technische Bundesanstalt (PTB), at BESSY II already in use to this effect and its construction is meant to significantly augment the capability to produce MM. The development of MINERVA has addressed the need for improved technical specifications, overcome existing limitations and achieve enhanced mechanical performances. We describe the design, construction process and implementation of Minerva that lasted three years. Even though the beamline is still under a commissioning phase, we expose tests and analysis that have been recently performed, remarking the improvements accomplished and the challenges to overcome, in order to reach the operational readiness for the mirror modules mass production.
	Slides TUOBM06 [47.675 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM06
About •	Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 09 February 2024
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TUPYP001	Shining Light on Precision: Unraveling XBPMs at the Australian Synchrotron	laser, feedback, monitoring, photon	33
	B. Lin, J. McKinlay, S. Porsa, Y.E. Tan AS - ANSTO, Clayton, Australia
	At the Australian Synchrotron (AS), the need for nondestructive X-ray beam positioning monitors (XBPM) in the beamline front ends led to the development and installation of an in-house prototype using the photoelectric effect in 2021. This prototype served as a proof of concept and an initial step towards creating a customised solution for real time X-ray position monitoring. Of the new beamlines being installed at the AS, the High-Performance Macromolecular Crystallography (MX3) and Nanoprobe beamlines require XBPMs due to their small spot size and high stability requirements. However, a significant hurdle is the short distance from the source point to the XBPM location, resulting in an extremely restricted aperture to accurately monitor the beam position. Scaling down the photoelectric prototype to accommodate the available space has proven challenging, prompting us to explore alternative designs that utilize temperature-based methods to determine the beam position. This paper details insights made from investigating this alternative method and design.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP001
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 February 2024
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TUPYP008	Exactly Constrained, High Heat Load Design for SABIA’s First Mirror	vacuum, MMI, alignment, monitoring	44
	V.B. Zilli, G.G. Basilio, J.C. Cezar, F.A. Del Nero, G.R.B. Ferreira, B.A. Francisco, M.E.O.A. Gardingo, R.R. Geraldes, A.C. Pinto, G.L.M.P. Rodrigues, L.M. Volpe, V.S. Ynamassu, R.G. de Oliveira LNLS, Campinas, Brazil C. Ambrosio CNPEM, Campinas, SP, Brazil
	Funding: Ministry of Science, Technology and Innovation (MCTI) The SABIA beamline (Soft x-ray ABsorption spectroscopy and ImAging) will operate in a range of 100 to 2000 eV and will perform XPS, PEEM and XMCD techniques at SIRIUS/LNLS. Thermal management on these soft x-ray beamlines is particularly challenging due to the high heat loads. SABIA’s first mirror (M1) absorbs about 360 W, with a maximum power density of 0.52 W/mm², and a water-cooled mirror was designed to handle this substantial heat load. To prolong the mirror operation lifetime, often shortened on soft X-ray beamlines due to carbon deposition on the mirror optical surface, a procedure was adopted using high partial pressure of O₂ into the vacuum chamber during the commissioning phase. The internal mechanism was designed to be exactly constrained using folded leaf springs. It presents one degree of freedom for control and alignment: a rotation around the vertical axis with a motion range of about ±0.6 mrad, provided by a piezoelectric actuator and measured using vacuum compatible linear encoders. This work describes the SABIA’s M1 exactly constrained, high heat absorbent design, its safety particularities compared to SIRIUS typical mirrors, and validation tests results.
	Poster TUPYP008 [1.582 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP008
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 21 February 2024
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TUPYP017	Design and Test of Precision Mechanics for High Energy Resolution Monochromator at the HEPS	experiment, photon, controls, GUI	51
	L. Zhang, H. Liang, Z.K. Liu, W. Xu, Y. Yang, Y.S. Zhang IHEP, Beijing, People’s Republic of China
	A monochromator stands as a typical representative of optical component within synchrotron radiation light sources. High resolution monochromators (HRMs), which incorporate precision positioning, stability control, and various other technologies, are a crucial subclass within this category. The next generation of photon sources imposes higher performance standards upon these HRMs. In this new design framework, the primary focus is on innovating precision motion components. Rigorous analysis and experimentation have confirmed the effectiveness of this design. This structural model provides valuable reference for developing other precision adjustment mechanisms within the realm of synchrotron radiation.
	Poster TUPYP017 [3.641 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP017
About •	Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 February 2024
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TUPYP022	The Development and Application of Motion Control System for HEPS Beamline	controls, interface, EPICS, hardware	61
	Z.Y. Yue, X.B. Deng, Z.H. Gao, G. Li, Y. Liu, C.X. Yin, D.S. Zhang, Q. Zhang, A.Y. Zhou IHEP, Beijing, People’s Republic of China
	In synchrotron radiation facilities such as the High Energy Photon Source (HEPS) beamline, thousands of motorized actuators are equipped on different optical devices, such as K-B mirrors, monochromator and transfocators, in order to acquire the specified properties of X-ray. The motion control system, as a part of the ultra-precision mechatronics devices, is used to precison positioning control, which not only has ability to realize basic motion functions but also can handle complex motion control requirements. HEPS has developed a standardized motion control system(MCS) for synchrotron radiation applications. In this paper, The structure of hardware and software of MCS will be presented, and some applications are demonstrated in detail.
	Poster TUPYP022 [0.847 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP022
About •	Received ※ 30 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024
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TUPYP026	Influence of the Groove Curvature on the Spectral Resolution in a Varied-Line-Spacing Plane Grating Monochromator (VLS-PGM)	photon, factory, target, experiment	67
	J. Du, X.W. Du, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Diffraction-limited synchrotron radiation (DLSR) light source with smaller source size and emittance makes ultra-high spectral resolution beamline possible. Here, we report an undulator-based beamline optical design with ultra-high spectral resolution using a varied-line-spacing plane grating monochromator (VLS-PGM), which is a well-proven design for achieving ultra-high resolution in the soft X-ray band. A VLS plane grating with a central groove density of 2400 l/mm is utilized to cover the photon energy region of 250 ~ 2000eV. VLS gratings are generally fabricated using the holographic method, but the resulting grating grooves are two-dimensionally curved curves, which can affect the resolution of the monochromator. To analyse this effect, we first use a spherical wavefront and an aspherical wavefront to generate the fringes and optimized the recording parameters. We also present a method for calculating the groove curvature of holographic plane VLS grating grooves. Furthermore, the influence of grating groove curvature on beamline resolution is theoretically analysed based on the aberration theory of concave grating.
	Poster TUPYP026 [0.480 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP026
About •	Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 12 March 2024
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TUPYP027	A Subnanometer Linear Displacement Actuator	site, laser, vacuum, experiment	70
	S.K. Jiang, X.W. Du, Q.P. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	With the development of synchrotron radiation technology, an actuator with sub-nanometer resolution, 100N driving force, and compatible with ultra-high vacuum environment is required. To achieve synchrotron radiation micro-nano focusing with adjustment resolution of sub-nanometer and high-precision rotation at the nano-arc level, most of the commercial piezoelectric actuators are difficult to meet the requirements of resolution and driving force at the same time. The flexure-based compound bridge-type hinge has the characteristic of amplifying or reducing the input displacement by a certain multiple, and can be used in an ultra-high vacuum environment. According to this characteristic, the bridge-type composite flexible hinge can be combined with commercial piezoelectric actuators, to design a new actuator with sub-nanometer resolution and a driving force of 100N. This poster mainly presents the principle of the new actuator, the design of the prototype and the preliminary test results of its resolution, stroke.
	Poster TUPYP027 [3.140 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP027
About •	Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 January 2024
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TUPYP028	Thermal Analysis Software for Optical Elements of Hefei Advanced Light Facility*	software, optics, interface, radiation	73
	M.H. Lin, J. Chen, S.K. Jiang, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Thermal deformation is a key influencing factor in the surface shape of optical components for beamline optics. In the process of beamline design, it is necessary not only to select different cooling schemes based on thermal loading conditions but also to extensively optimize the parameters of these cooling schemes. The traditional approach for optimizing cooling scheme design often requires significant manual effort. By integrating existing experience in optimizing cooling scheme designs, this study transforms the parameterized design tasks that were originally performed manually into automated processes using software. This paper presents the latest advancements in the automated design software for cooling schemes of beamline optical components, and the results indicate that the optimization outcomes of the existing automated design software are close to those achieved through manual optimization.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP028
About •	Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 03 December 2023
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TUPYP030	The Design of High Stability Double Crystal Monochromator for HALF	vacuum, optics, cryogenics, radiation	76
	Z.L. Xu, J. Chen, X.W. Du, Y. Peng, Q.P. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	HALF is a fourth-generation synchrotron light source with a number of state-of-the-art beamlines. Naturally, the new 4th generation machines, with their small emittances, start to bring higher stability performance requirements. In response to these problems, an concept of a high stability DCM (Double Crystal Monochromator) with angular range between 14 and 81 degrees (equivalent to 2 to 8 keV with Si(111)) has been developed at the National Synchrotron Radiation Laboratory. This poster gives an overview of the DCM prototype project including specifications, Mechanical design, heat load management and stability consideration.
	Poster TUPYP030 [1.221 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP030
About •	Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 24 January 2024
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TUPYP032	An Argon-Oxygen or Argon-Hydrogen Radio-Frequency Plasma Cleaning Device for Removing Carbon Contamination from Optical Surfaces	plasma, vacuum, radiation, experiment	79
	H.J. Yuan, X.W. Du, Q.P. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Due to synchrotron radiation, carbon contamination on the surfaces of optical elements inside the beamlines, such as mirrors and gratings, remains an issue. Future beamline designs will select more optical element surface coating materials according to the specific needs, including gold, platinum, chromium, nickel, and aluminum, and a single cleaning method will not be able to adequately address the demands. We have studied the RF plasma cleaning of optical elements. After the argon/oxygen or argon/hydrogen gas mixture was injected into the chamber, glow discharge was carried out, and the carbon on the surface of the inert metal-coated optical element and oxidation-prone metal-coated optical element was removed by the oxidation or reduction reaction of radicals. In order to optimize the discharge parameters, it utilizes a differential mass spectrometry system and an optical emission spectrometer to monitor the cleaning process. This paper introduces the principles of the two cleaning methods as well as our existing cleaning device.
	Poster TUPYP032 [2.493 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP032
About •	Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 19 December 2023
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TUPYP037	Mechanical Design of Multilayer Kirkpatrick-Baez (KB) Mirror System for Structural Dynamics Beamline (SDB) at High Energy Photon Source (HEPS)	simulation, optics, experiment, photon	82
	R.Y. Liao, L. Gao, Z.N. Ou, S. Tang, H.H. Yu, B.B. Zhang IHEP, People’s Republic of China
	SDB aims in-situ real-time diagnosis in dynamic compression science and additive manufacturing. Nano-experimental environment requires highly multilayer KB mirror system in thermal deformation and stability of mechanism. This paper illustrates the KB cooling scheme and mechanical design. Only using variable-length water cooling to control the temperature and thermal deformation of mirror has limitations here. First, the installation of cooling system should be non-contact so that the surface shape can be sophisticatedly controlled without deformation of chucking power. Second, the distance between the HKB and the sample stage is too small to arrange the cooling pipe. Third, the KB mirror has multi-dimensional attitude adjustment. Cu water cooling pipe would be dragged with adjustment thus it has to be bent for motion decoupling, which occupies considerable space. Thus, the Cu cooling block and water cooling pipe are connected by copper braid. Eutectic Gallium-Indium fills a 100 ¿m gap between the cooling block and KB mirror to avoid chunking power deformation. Finally, the structural stability and chamber sealability is analyzed.
	Poster TUPYP037 [1.234 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP037
About •	Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024
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TUPYP039	A Design of an X-ray Monochromatic Adjustable Slit for HEPS Beamlines	GUI, vacuum, controls, collimation	88
	S. Liu, Q.H. Duan, Q. Han, Z. Li, J.L. Yang, Z.Y. Yue, Q. Zhang, Z.B. Zhang IHEP, People’s Republic of China
	The monochromatic slit is a commonly used device in HEPS beamlines. It can limit the synchrotron beam-spot within a desired size required by the downstream optical equipment. In addition, the four-blade structure is the most widely used form of slit. The slit with this form usually consists of a pair or two parallel tungsten carbide blades. With their edges close to each other, a slit can be formed, and the size of which can be controlled by micromechanical guides. This structure is very suitable for the case of large beamsize. In this work, we have designed a monochromatic slit based on the four-blade form for BF-beamline in HEPS. It can be used in ultra-high vacuum, high luminous flux working environment. The maximum opening range is up to 30mm10mm (HV), while it can allow a white beam of 136mm24mm (HV) to pass through. Furthermore, we adopted a point to surface contact design, which can effectively avoid the over-constraint problem between two guide rails.
	Poster TUPYP039 [0.457 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP039
About •	Received ※ 10 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024
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TUPYP050	Design and Calculation of Vacuum System for WALS Storage Ring	vacuum, photon, storage-ring, radiation	105
	C.Y. Liu, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, Y. Nie, J. Wang, Y. Wang, G. Wei, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou IAS, Wuhan City, People’s Republic of China
	Funding: * Work supported by the Key R&D Project of Hubei Provincial Department of Science and Technology, No. 2021AFB001. Wuhan Advanced Light Source (WALS) is a fourth-generation synchrotron radiation facility with 1.5 GeV designed energy and 500 mA beam current. The storage ring vacuum system has to be designed in such a way which is compatible with a multi-bend achromat (MBA) compact lattice. the new technology of non-evaporable getter (NEG) coating was used, which is more and more popular in accelerator equipment. The design of the whole vacuum chamber and the nec-essary calculations were posted in the paper. The results indicated that the design of the vacuum system can meet the design requirement.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP050
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024
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TUPYP053	Current Status of Vibration Monitoring System at SOLARIS	operation, storage-ring, software, monitoring	111
	M. Piszak NSRC SOLARIS, Kraków, Poland
	Solaris synchrotron radiation centre, despite being relatively new facility, began expansion of its experimental hall in 2022 in order to accommodate new beamlines. The construction works were carried out along with regular accelerators and beamlines operation and generated high levels of vibration. To better understand the influence of vibrations on electron and x-ray beams¿ stability, an accelerometer-based monitoring system was designed and implemented. The system consists of a triaxial measurement point equipped with seismic accelerometers located on bending magnet inside storage ring and a central signal conditioning and acquisition point. The results of long-term vibration data collection and analysis will be presented along with plans for the future system expansion.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP053
About •	Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 December 2023
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TUPYP055	Application of QXAFS in the Medium-Energy X-ray Absorption Spectroscopy	experiment, data-acquisition, SRF, synchrotron-radiation	118
	Y.H. Xia, J.F. Chang, S.Q. Chu, S.H. Liu, F.F. Yang, G.K. Zhang, H.Y. Zhang, J. Zhang, L. Zheng IHEP, Beijing, People’s Republic of China
	X-ray absorption fine-structure (XAFS) spectroscopy, including X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), is an important experimental method at synchrotron radiation facilities, which has been applied in scientific research and industry applications. Traditional XAFS spectrum is obtained by controlling the rotation of the monochromator by a stepper driver, then measuring the absorption coefficient of each energy point. While in quick-scanning XAFS (QXAFS), the angle of the monochromator moves continuously and quickly, greatly reducing the spectral acquisition time. It has become a powerful tool to study in-situ dynamic processes. Currently QXAFS is mainly used in hard X-ray absorption spectroscopy beamlines of synchrotron radiation facilities, here we have developed a QXAFS system in the medium-energy X-ray beamlines, which will improve the function of XAFS beamlines and extend their capabilities to a wider user community.
	Poster TUPYP055 [0.689 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP055
About •	Received ※ 04 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 November 2023
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WEOAM02	A Vacuum Aspirated Cryo Cooling System (VACCS)	controls, cryogenics, vacuum, optics	121
	G.M.A. Duller, D.L. Magrath, M. Nagy, B. Olafsson DLS, Oxfordshire, United Kingdom
	The use of liquid nitrogen for cooling of synchrotron equipment is widespread. The cryogenic sub-coolers commonly employed come with some significant drawbacks such as cost, complexity, stiffness of distribution lines, and vibration induced by pressure variations. The typical sub-cooler is capable of handling 2-3kW of absorbed power whilst many optics require no more than 50-150W of cooling. We present a Vacuum Aspirated Cryo-cooling System (VACCS) which overcomes many of these disadvantages and which allows cryo-cooling to be implemented more widely. The VACCS system uses a vacuum, generated with no moving parts, to draw LN2 through a heat exchanger. Thus the system does not have to be pressure rated. We describe our designs for highly flexible distribution lines. A simple control system offers variable temperature at the heat exchanger by varying the flowrate of LN2. A system is installed at Diamond which allows the independent control of three zones. A test rig has demonstrated cooling capacity in excess of 100W for a monochromator crystal assembly and controlled temperatures -194¿-120C.
	Slides WEOAM02 [21.578 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM02
About •	Received ※ 31 October 2023 — Revised ※ 27 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024
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WEOBM01	Challenges and Solutions for the Mechanical Design of SOLEIL-II	dipole, lattice, vacuum, storage-ring	133
	K. Tavakoli, F. Alves, G. Baranton, Y. Benyakhlef, A. Berlioux, A. Carcy, M.-E. Couprie, J. Da Silva Castro, S. Ducourtieux, Z. Fan, C. Herbeaux, C.A. Kitégi, A. Le Jollec, F. Lepage, V. Leroux, A. Loulergue, F. Marteau, A. Mary, A. Nadji, S. Pautard, V. Pinty, M. Ribbens, T.S. Thoraud SOLEIL, Gif-sur-Yvette, France
	The Synchrotron SOLEIL is a large-scale research facility in France that provides synchrotron radiation from terahertz to hard X-rays for various scientific applications. To meet the evolving needs of the scientific community and to remain competitive with other European facilities, SOLEIL has planned an upgrade project called SOLEIL-II. The project aims to reconstruct the storage ring as a Diffraction Limited Storage Ring (DLSR) with a record low emittance which will enable nanometric resolution. The mechanical design of the upgrade project involves several challenges such as the integration of new magnets, vacuum chambers, insertion devices and beamlines in the existing infrastructure, the optimization of the alignment and stability of the components, and the minimization of the downtime during the transition from SOLEIL to SOLEIL-II. The mechanical design is mainly based on extensive simulations, prototyping and testing to ensure the feasibility, reliability, and performance of several key elements. This abstract presents an overview of the mechanical design concepts and solutions adopted for the SOLEIL-II project.
	Slides WEOBM01 [8.729 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM01
About •	Received ※ 25 September 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 03 April 2024
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WEOBM02	Development of the Bent Focusing Mirror in HEPS from Design to Test	focusing, ECR, SRF, photon	136
	M.W. Chen, M. Li, S. Tang, F.G. Yang IHEP, People’s Republic of China
	The focusing mirrors are important for each beamline in the 4th generation photon source. One bent focusing face-down mirror in HEPS is taken for an example to be introduced from the design to the test. The effect of the gravity of the mirror is considered in the design. Moreover, for the sake of the compromise between the processing and the precision, the polygonal structure is adopted. Also, the iteration of the solution is improved to increase the design efficiency. The results reveal that the theoretical precision of the mirror after bending can reach less than 100 nrad RMS. In the aspect of the mechanics, the scheme of four roller bender comes out to avoid the parasitic moment, and the movable component in the bender are all coated with the MoS2. As the type of the measurement is facing side which is different from the type of the actual condition, the effect of the gravity must be included in the metrology results. In the meantime, the stability and the repeatability are also measured. The result can be converged to around 200 nrad RMS, which is less than the required error. The stability, ¿R/R, can be constrained under the 0.6%, showing the outstanding performance.
	Slides WEOBM02 [3.638 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM02
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 16 April 2024
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WEOBM03	The Design and Progress of the Network and Computing System for HEPS	software, data-analysis, network, data-management	139
	H. Hu, Y.S. Cheng, Q. Hu, Y. Hu, F.Z. Qi, X.H. Wang, S. Zeng, H.M. Zhang IHEP, Bejing, People’s Republic of China
	The 14 beamlines for the phase I of High Energy Photon Source(HEPS) will produces more than 300PB/year raw data. Efficiently storing, analyzing, and sharing this huge amount of data presents a significant challenge for HEPS. HEPS Computing and Communication System(HEPSCC), also called HEPS Computing Center, is an essential work group responsible for the IT R&D and services for the facility, including IT infrastructure, network, computing, analysis software, data preservation and management, public services etc. Aimed at addressing the significant challenge of large data volume, HEPSCC has designed and established a network and computing system, making great progress over the past two years.
	Slides WEOBM03 [2.921 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM03
About •	Received ※ 27 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 09 December 2023
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WEOBM05	Thermal Calculation and Testing of SLS 2.0 Crotch Absorbers	simulation, storage-ring, GUI, synchrotron-radiation	145
	X. Wang, B.S. Bugmann, R. Ganter, M. Maeher, C. Rosenberg, A. Weber PSI, Villigen PSI, Switzerland
	The storage ring of SLS2.0 based on a multibend achromat lattice will have the maximum electron energy of 2.7 GeV. The synchrotron radiation emitted by bending magnets, except for a small portion designated to beamlines, will be dissipated by crotch absorbers to protect downstream vacuum elements. SLS2.0 crotch absorbers are designed to have two water-cooled, toothed jaws made of Glidcop to dissipate a maximum heat power of 6 kW. Finite element analysis has been conducted to validate the thermal and mechanical strength of the absorbers’ mechanical design. A conjugate heat transfer (CHT) simulation, utilizing direct coupled solid and fluid zones with Computational Fluid Dynamics (CFD) software ANSYS Fluent, was performed to verify the water cooling concept. Furthermore, a prototype absorber underwent testing in an e-beam welding chamber, where the temperatures of the absorber and cooling water were measured and compared against calculated values. The test results not only confirmed the absorber’s ability to dissipate the specified heat load but also validated the thermal modelling methods. This presentation will focus on aspects of numerical simulation and thermal testing.
	Slides WEOBM05 [5.159 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM05
About •	Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 March 2024
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WEOBM07	Design, Modeling and Analysis of a Novel Piezoactuated XY Nanopositioner Supporting Beamline Optical Scanning	simulation, coupling, GUI, controls	150
	L.F. Wang, G.C. Chang, S. Tang, Z.Y. Yue, L. Zhang IHEP, Beijing, People’s Republic of China
	In recent years, with the advancement of X-ray optics technology, the spot size of synchrotron beamlines has been reduced to 10nm or even smaller. The reduction in spot size and the emergence of ultra-bright synchrotron sources necessitate higher stability, resolution, and faster scanning speeds for positioning systems. This paper presents the design, analysis, and simulation of an XY piezoelectric driven nanopositioning platform that supports high-precision optical scanning systems. To achieve fast and highly precise motion under the load of an optical system, a design scheme based on a hollow structure with flexible amplification and guiding mechanisms is proposed. This scheme increases displacement output while minimizing coupling displacement to ensure a high natural frequency. The rationality of this platform design is verified through modeling and finite element simulation.
	Slides WEOBM07 [3.448 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM07
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 18 April 2024
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WEPPP002	The Status of the High-Dynamic DCM-Lite for Sirius/LNLS	controls, MMI, alignment, vacuum	154
	G.S. de Albuquerque, J.P.S. Furtado, N.P. Hara, M. Saveri Silva, T.R. Silva Soares LNLS, Campinas, Brazil
	Funding: Ministry of Science, Technology and Innovation (MCTI) Two new High-Dynamics Double Crystal Monochromators (HD-DCM-Lite) are under installation for QUATI (superbend) and SAPUCAIA (undulator) beamlines at Sirius. The HD-DCM-Lite portrays an updated version of Sirius LNLS HD-DCMs not only in terms of being a lighter equipment for sinusoidal scans speeds with even higher stability goals, but also bringing forward greater robustness for Sirius monochromators projects. It takes advantage of the experience gained from assembly and operation of the previous versions during the last years considering several work fronts, from the mechanics of the bench and cooling systems to FMEA, alignment procedures and control upgrades. In this work those challenges are depicted, and first offline results regarding thermal and dynamical aspects are presented.
	Poster WEPPP002 [7.970 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP002
About •	Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 11 December 2023
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WEPPP009	POLAR Synchrotron Diffractometer	detector, alignment, scattering, simulation	161
	G. Olea, N. Huber, J. Zeeb HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany
	A new product for research purposes aiming to work in a synchrotron facility after its upgradation (APS-U) has been recently developed. Based on specific beam characteristics (emittance, coherence, variable polarization) and several X-ray diffraction (XRD) techniques applied (resonant, reflectivity) on single crystal and thin films under extreme conditions (temperature, pressure), the product is expected to fast progress the investigations of magnetic materials at nanoscale level. The dedicated machine (diffractometer) will be in one of the newly constructed experimental enclosure (G) of a main beamline (POLAR) in the 4th (ID-4) sector, serving a large spectrum of investigations for Magnetic Material (MM) group. POLAR-Dm was conceived on a traditional 6C (C-circles) geometry, maintaining the common kinematic structural principle of its family. With the addition of several interchangeable positioning devices (e.g., Euler cradle, air bearings stages, etc) the system is expanding the spectrum of possible investigations, maintaining the precision of new setups. The kinematic, design and precision concepts applied, together with the obtained test results are all in detail presented. * J. Strempfer et al., Possibilities at Polar beamline with APS-U, 14th Int. Conf. SRI2021, J. Phys., 2380 (2022) 012038 ** HUBER Diffractionstechnik GmbH&Co.KG, 2023, www.xhuber.com
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP009
About •	Received ※ 02 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 28 February 2024
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WEPPP015	Progress of Front Ends at HEPS	photon, radiation, insertion-device, storage-ring	175
	H. Shi, P. Luo, Y.X. Ma, Y. Tan, H.Y. Wang IHEP, Beijing, People’s Republic of China
	High Energy Photon Source (HEPS) is a 6GeV synchrotron radiation facility building in Huairou, with a storage ring perimeter of 1390.6m and 41 straight sections. In phase I, 15 front ends will be installed, including 14 insertion device front ends and 1 bending magnet front end. These front ends are divided into three types: the Undulator front end, the Wiggler front end, and the BM front end. The U-type front end will receive 766W/mrad² of peak power density and 25kW of the total power. The design of the W-type front end is based on compatibility with various insertion devices, including udulators and wigglers. In this paper, the designs and the progress of HEPS front ends are presented.
	Poster WEPPP015 [2.147 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP015
About •	Received ※ 01 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 January 2024
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WEPPP016	Mechanical Design of XRS & RIXS Multi-Functional Spectrometer at the High Energy Photon Source	scattering, photon, synchrotron-radiation, radiation	178
	J.C. Zhang, Z.Y. Guo, X. Jia, S.X. Jin, Z.N. Ou, W.F. Sheng, S. Tang, R.Z. Xu, W. Xu, Y.J. Zhang IHEP, Beijing, People’s Republic of China
	The integration of an X-ray Raman spectroscopy (XRS) spectrometer and a Resonant Inelastic X-ray scattering (RIXS) spectrometer at HEPS is described. The XRS has 6 regular modular groups and 1 high resolution modular group. In total 90 pieces of spherically bent analyzer crystals are mounted in low vacuum chambers with pressure lower than 100Pa. On the other hand, the RIXS spectrometer possesses one spherically bent analyzer crystal configured in Rowland geometry whose diameter is changeable from 1m to 2m. The scattering X-ray photons transport mostly in helium chamber to reduce absorption by air. The RIXS and the high resolution module can be exchanged when needed. Six air feet are set under the granite plate to unload the weight when the heavy spectrometer is aligned. The natural frequency and statics of the main granite rack were analyzed and optimized to maintain high stability for the HEPS-ID33 beamline at the 4th generation source. A type of compact and cost-effective adjustment gadget for the crystals was designed and fabricated. Economic solutions in selection of motors and sensors and other aspects were adopted for building the large spectrometer like this.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP016
About •	Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 April 2024
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WEPPP019	Coating Removal of Silicon-Based Mirror in Synchrotron Radiation by Soluble Underlayers	optics, synchrotron-radiation, radiation, photon	181
	Q. Hou, G.C. Chang, B. Ji, M. Li, S.P. Yue IHEP, People’s Republic of China
	Multilayer optics is widely used for the x-ray beam monochromatization, focusing, and collimation in synchrotron light source. However, the multilayer coatings might be damaged by the high heat loads, the poor film adhesion, the high internal stress, or the inadequate vacuum conditions. As a result, it is essential to develop a method to make the optical substrate reusable without compromising its quality. In our published work, we successfully prepared a W/B4C multilayer coating with a 2 nm Cr buffer layer on a small-sized Si wafer. The coating was stripped from the Si substrate by dissolving the Cr buffer layer using an etchant. After the etching process, the sample’s roughness was comparable to that of a brand-new substrate. We have since utilized this method to clean the multilayers on the surface of a 20 cm × 5 cm silicon-based mirror for High Energy Photon Source (HEPS). The surface roughness and shape were measured, and they reached the level of a brand-new mirror.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP019
About •	Received ※ 02 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 19 December 2023
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WEPPP025	Application of CuCrZr in the Front-end of Shanghai Synchrotron Radiation Facility	vacuum, radiation, synchrotron-radiation, SRF	187
	S. Wu, Y. Li, J.N. Liu, J.W. Wang SARI-CAS, Pudong, Shanghai, People’s Republic of China
	Glidcop, oxygen free copper and other materials are mainly used in the Front-end of the Shanghai Synchrotron Radiation Facility(SSRF). CuCrZr material has high heat load capacity, high yield strength and tensile strength, good thermal conductivity and low vacuum outgassing rate. At present, it has been used as a heat sink material in the heat exchanger of nuclear reactors. In this paper, based on the previous process exploration, the Front-end absorber is made of CuCrZr material, and the technical scheme of integral processing of flange and absorber is adopted. The thermal stress and deformation of CuCrZr absorber are analyzed by finite element method, and the processing of CuCrZr absorber is completed, and it is applied to the SSRF BL04Ucanted front end. After a period of electron beam cleaning, vacuum and temperature tests were carried out under high thermal load power, and the characteristics of the material in practical use were analyzed, which proved that CuCrZr material can be used in SSRF under high heat load.
	Poster WEPPP025 [0.815 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP025
About •	Received ※ 01 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 December 2023
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WEPPP029	A Novel Flexible Design of the FaXToR End Station at ALBA	detector, GUI, photon, experiment	190
	L.R.M. Ribó, N. González, L. Nikitina, A.P. Patera ALBA-CELLS, Cerdanyola del Vallès, Spain A. Mittone ANL, Lemont, Illinois, USA
	FaXToR is one of the beamlines currently in con-struction and commissioning phase at ALBA, dedicat-ed to fast hard X-ray imaging. It will offer absorption and phase contrast imaging to users. Possible applica-tions of the beamline include 3D static and dynamic inspections in a wide range of applications. FaXToR aims to provide both white and monochromatic beam of maximum 36x14 mm (HxV) at sample position with a photon energy up to 70 keV. The optical layout of the beamline will tune the beam depending on the specific experimental conditions. Among the required optical elements, there is a multilayer monochromator, the cooled slits, the filtering elements, the intensity moni-tor and the beam absorption elements. The end station will be equipped with a rotary sample stage and a de-tector system table to accommodate a dual detection thus simultaneously scanning the samples with high spatial and temporal resolutions. On top of it, a motor-ized auxiliary table dedicated to complex sample envi-ronment or future upgrades will translate along the total table length, independently from the two detector system bridges. The design and construction process of the beamline will be presented.
	Poster WEPPP029 [0.851 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP029
About •	Received ※ 26 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 10 December 2023
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WEPPP034	ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions	experiment, interface, vacuum, cryogenics	199
	O. Traver Ramos, J.J. Casas, C. Colldelram, J.L. Frieiro, B. Molas, M. Quispe, M. Sanchez ALBA-CELLS, Cerdanyola del Vallès, Spain
	The Thermal Contact Conductance (TCC) between two surfaces plays a very important role in the design of components in particle accelerators. The TCC depends on many variables such as surface finish, type of material, pressure, temperature, etc. As a general rule, the TCC comes from experimental results reported in the specialized literature. However, it is not always possible to find this information, especially if components are designed to operate in cryogenic and vacuum conditions, for this reason, assumptions are made that render results with high uncertainty. In this context, ALBA has designed an experimental set up to carry out axial heat flow steady state experiments for the evaluation of TCC under vacuum and cryogenic conditions. The minimum pressure achievable in the set up will be 1e-5 mbar while the temperature may vary between 80 and 300 K. The results will provide inputs to further optimize ALBA designs, including ALBA II, our ongoing fourth-generation synchrotron upgrade project. This paper describes the experimental setup, the thermal and mechanical design considerations and experimental validation tests.
	Poster WEPPP034 [0.616 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP034
About •	Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 05 April 2024
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WEPPP039	Data Preprocessing Method of High-Frequency Sampling XAFS Spectra Collected in a Novel Combined SAXS/XRD/XAFS Technique	detector, experiment, interface, data-acquisition	207
	Y.P. Liu, Z.J. Chen, G. Mo, Z.H. Wu IHEP, Beijing, People’s Republic of China
	High-frequency (HF) sampling X-ray absorption fine structure (XAFS) spectra with a time-resolution of ~8s were collected in our newly developed synchrotron radiation small-angle X-ray scattering (SAXS)/X-ray diffraction (XRD)/XAFS combined technique. Restoring the HF XAFS spectrum which contains hundreds of thousands to millions of data points to a normal XAFS spectrum consisting of hundreds of data points is a critical step for the subsequent neighbor structure analysis. Herein, the data preprocessing method and procedure of HF XAFS spectra were proposed according to the absorption edge of the standard sample and the rotation angular velocity of the monochromator. This work is expected to facilitate the potential applications of HF XAFS spectra in a time-resolved SAXS/XRD/XAFS experiment.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP039
About •	Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 18 May 2024
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WEPPP040	Experimental Methods Based on Grazing Incidence at the 1W1A Beamline of the Beijing Synchrotron Radiation Facility and Its Application inn Characterizing the Condensed State Structure of Conjugated Po	experiment, operation, synchrotron-radiation, radiation	210
	Y. Chen IHEP, Beijing, People’s Republic of China P. Cheng, H.X. Li Sichuan University, Chengdu, People’s Republic of China Y.C. Han CIAC, Changchun, People’s Republic of China
	The diffuse scattering experimental station of BSRF uses the dual focused monochromatic X-ray provided by 1W1A beam line to carry out structural research on crystal and film materials. This experimental station can carry out high-resolution XRD, XRR, GIXRD, GIWAXS/GISAXS and other experimental methods. GIWAXS/GISAXS is an important method for characterizing the condensed structure of conjugated polymers. We have upgraded and optimized the grazing incidence experimental method of the experimental station, and developed a grazing incidence remote rapid sampling platform. Greatly reduces testing time and enables remote online testing operations for users. Subsequently, we further established in-situ steam treatment, in-situ thermal annealing, in-situ drip coating, in-situ spin coating, in-situ scraping coating, and GISAXS testing platforms, enriching the line station grazing incidence testing methods.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP040
About •	Received ※ 30 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024
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WEPPP041	The Joy of Vibration Mitigation	ISOL, damping, optics, acceleration	212
	J.H. Kelly, S.G. Alcock, S.A. Beamish, D. Crivelli DLS, Oxfordshire, United Kingdom
	The decision was made to build a new Optics Metrology Lab at the Diamond Light Source in a location with 100 times higher floor velocity in the range 50-150Hz than the original location. This paper describes the successful engineering developments to mitigate this. The raft of measures included ‘skyhook¿ damping i.e. active damping using geophone velocity feedback, novel 2 stage passive vibration isolation and fundamental research into acoustic coupling of air conditioning noise. The new systems have been installed, the final performance tested and the optics scientists have been able to continue their sensitive measurements.
	Poster WEPPP041 [1.826 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP041
About •	Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 25 March 2024
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WEPPP050	Quick scanning Channel-Cut crystal monochromator for millisecond time resolution EXAFS at HEPS	controls, simulation, vacuum, synchrotron-radiation	229
	Y.S. Lu, H. Liang, Z.K. Liu, D.S. Shen, Z. Sun, Y. Yang, S. Zhang, Y.S. Zhang IHEP, Beijing, People’s Republic of China
	The design and capabilities of a Quick scanning Channel-Cut monochromator (QCCM) for HEPS are presented. The quick scan and step scan are realized by a torque motor directly driven Bragg axis, controlled by a servo controller. This design allows easy and remote control of the oscillation frequency and angular range, providing comprehensive control of QXAFS measure-ments. The cryogenically cooled Si (311) and Si(111) crystals, which extends the energy range from 4.8 keV-45 keV. The dynamic analysis verifies the rationality of the mechanical structure design. The device was fabri-cated and tested, results show an oscillation frequency up to 50Hz with a range of 0.8°, and a resolution of 0.2 arcsecond in step scan mode. This device demonstrates the feasibility of large range quick scan and step scan by a single servo control system. Quick scanning Channel-Cut crystal monochromator
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP050
About •	Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024
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WEPPP054	Vibration Analysis of Storage Ring Girder for the Korea 4GSR	storage-ring, operation, alignment, resonance	236
	G.W. Hong, T. Ha, H.S. Han, H.-G. Lee PAL, Pohang, Republic of Korea
	Ensuring the mechanical stability of the girder for a 4th generation storage ring (4GSR) is crucial to provide a high-quality photon beam to users because the mechanical motion should be maintained at less than 10% of the electron beam size which is expected to be sub-micrometer. One of the key roles of the girder is to provide structural rigidity and temperature stability while effectively suppressing vibrations from the ground during accelerator operation. The Korea 4GSR girder is being designed to have the first natural frequency above 50 Hz to minimize the effect of the ground vibration. In order to maintain better mechanical stability, it is necessary to conduct research not only on the natural vibration evaluation of the girder but also on external vibrations to the girder structure. In this paper, we introduce the result of the harmonic analysis of the girder structure using the finite element method.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP054
About •	Received ※ 25 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 July 2024
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WEPPP058	Permanent Magnets in SOLEIL II	dipole, quadrupole, lattice, permanent-magnet	240
	A. Berlioux, Y. Benyakhlef, C.A. Kitégi, F. Marteau, A. Mary, R.E. Raimon, M. Ribbens, K. Tavakoli SOLEIL, Gif-sur-Yvette, France
	Twenty years after SOLEIL Synchrotron was established, the facility needs to adapt to follow new scientific fields that have emerged since. The proposed new lattice for upgrading SOLEIL storage ring will reduce the horizontal emittance by a factor 50 to reach less than 100 pm.rad. This new lattice presents significant challenges and requires compact magnets that provide strong gradients. As a result, permanent magnet (PM) technology is preferred over electromagnet (EM) technology whenever possible. All sextupoles and octupoles will be EM to ensure efficient optic correction. However, all dipoles, reverse bends and quadrupoles will be PM. The replacement of aging infrastructure and the use of PM will lead to a noticeable reduction in SOLEIL’s electric power consumption and environmental footprint. SOLEIL II lattice consists of 116 dipoles with gradient and 354 PM quadrupoles which can also be used as reverse bends. All PM multipoles have been designed by SOLEIL¿s Mechanical Engineering Group in close collaboration with the Magnetic and Insertion Devices Group. This contribution will present the design, assembly procedure, and prototyping of SOLEIL II PM multipoles.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP058
About •	Received ※ 23 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 July 2024
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THOAM02	SmarGon MCS2: An Enhanced Multi-Axis Goniometer with a New Control System	controls, operation, software, interface	247
	W. Glettig, D. Buntschu, E.H. Panepucci, M. Wang PSI, Villigen PSI, Switzerland A. Omelcenko SmarAct, Oldenburg, Germany
	As an improvement on the commercially available SmarGon multi-axis goniometer (SmarAct GmbH), the MX Group at the Paul Scherrer Institute (PSI) has been pursuing further development of the system. In addition to suggesting mechanical improvements to SmarAct to improve ruggedness and reliability, PSI has developed a brand-new and flexible control system for better customization, reliability and control. Calibration routines were implemented to reduce systemic errors, and the system has been tailored for practical beamline usage. SmarGon is a six degree-of-freedom positioning device, allowing positioning of a sample and orientation around any given point, with <5um sphere of confusion diameter. It was purpose-built for protein-crystallography experiments but, as will be presented here, was also re-purposed for other applications. Two devices have been in continuous 24/7 use for two years at the MX Beamlines PXI & PXII at SLS.
	Slides THOAM02 [77.940 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM02
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 08 January 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOAM04	Overall Progress on Development of X-ray Optics Mechanical Systems at High Energy Photon Source (HEPS)	optics, vacuum, synchrotron-radiation, radiation	252
	S. Tang, Y.H. Dong, X.H. Kuang, M. Li, H. Liang, R.Y. Liao, L.H. Ma, Z.N. Ou, H. Qian, Z.R. Ren, W.F. Sheng, J. Wang, R.Z. Xu, H.H. Yu IHEP, Beijing, People’s Republic of China
	Funding: This work is supported by the project of High Energy Photon Source (HEPS). High Energy Photon Source (HEPS) regarded as a new 4th generation synchrotron radiation facility, is under construction in a virgin green field in Beijing, China. The X-ray optics/mirror mechanical systems (MMS) play an important role, which would be expected to be designed carefully and rigidly for the extremely stable performance requirement of HEPS. In addition, there are indeed big challenges due to so many types of mirror systems, such as white beam mirror (WBM), harmonic suppression mirror (HSM), combined deflecting mirror (CDM), bending mirror, Nano-KB, and the transfocator of Compound refractive lens (CRLs), etc. Therefore, overall progress on design and maunfacturing of the MMS is introduced, in which a promoting strategy and generic mirror mechanical system as a key technology is presented and developed for the project of HEPS. Furthermore, ultra-stable structucture, multi-DOF precision positioning, Eutectic Galium Indium (E-GaIn)-based vibration-decoupling watercooling, clamping, and bending have always been prior designs and considerations. Shanzhi Tang, Weifan Sheng, Jianye Wang, et al, Overall progress on the design of mirror mechanical systems at High Energy Photon Source (HEPS), SRI2021, Hamburg Germany, 2022. POSTER
	Slides THOAM04 [2.328 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM04
About •	Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024
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THOAM05	Modeling the Disturbances and the Dynamics of the New Micro CT Station for the MOGNO Beamline at Sirius/LNLS	experiment, GUI, detector, software	256
	G.S. Baldon, F. Ferracioli, R.R. Geraldes, G.B.Z.L. Moreno, G.S. de Albuquerque LNLS, Campinas, Brazil
	Funding: Ministry of Science, Technology and Innovation (MCTI) At the 4th generation synchrotron laboratory Sirius at the Brazilian Synchrotron Light Laboratory (LNLS), MOGNO is a high energy imaging beamline, whose Nano Computed Tomography (CT) station is already in operation. The beamline’s 120x120 nm focus size, 3.1x3.1 mrad beam divergence, and 9·10¹¹ ph/s flux at 22-67 keV energy, allows experiments with better temporal and spatial resolution than lower energy and lower stability light sources. To further utilize its potential, a new Micro CT station is under development to perform experiments with 0.5-55 um resolution, and up to 4 Hz sample rotation. To achieve this, a model of the disturbances affecting the station was developed, which comprised: i) the characterization and simulation of disturbances, such as rotation forces; and ii) the modeling of the dynamics of the Micro-station. The dynamic model was built with the in-house developed Dynamic Error Budgeting Tool, which uses dynamic substructuring to model 6 degrees of freedom rigid body systems. This work discusses the tradeoffs between rotation-related parameters affecting the sample to optics stability and the experiment resolution in the frequency domain integrated up to 2kHz. N. L. Archilha, et al. 2022, J. Phys.: Conf. Ser. 2380 012123. ** R. R. Geraldes et al. 2022, Precision Engineering Vol. 77, 90-103.
	Slides THOAM05 [11.814 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM05
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 March 2024
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THPPP003	FEM Simulations for a High Heat Load Mirror	polarization, optics, simulation, undulator	274
	J. Seltmann, H. Geraissate, M. Hoesch DESY, Hamburg, Germany
	At the variable polarization XUV beamline P04 of PETRA III the first mirror is used to switch the beam between the two branches of the beamline. The heat load on this white beam mirror is dependent on the degree of polarization and the energy of the first harmonic of the synchrotron radiation. For this project the water cooled "notched" mirror approach by Khounsary* and Zhang et al.** has been evaluated with FEM simulations. These show promising results for linear horizontal (LH) polarization in which the heat load profile is aligned with the mirror length. For linear vertical (LV) polarization the heat load is concentrated in the mirror centre, which violates the basic concept of the "notched" mirror design and therefore the simulation results indicate only poor performance. To compensate for this a secondary cooling loop has been implemented and will be shown to improve the performance for the LV case significantly. Additionally, a new design approach is evaluated to reduce the peak temperatures of the mirror, which otherwise ranged at 140-180°C. * Khounsary, A.M., Proc. SPIE 3773, X-Ray Opt. Des., (1999). 10.1117/12.370114 ** Zhang, L. et al., J. Phys.: Conf. Ser. 425, 052029 (2013). 10.1088/1742-6596/425/5/052029.
	Poster THPPP003 [1.369 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP003
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 28 May 2024
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THPPP007	Optimizing Indirect Cooling of a High Accuracy Surface Plane Mirror in Plane-Grating Monochromator	optics, SRF, brightness, ECR	280
	J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility. For the cooling of the plane mirror in VIA-PGMs (var-iable-included-angle plane-grating monochromators), the top-side indirect cooling based on water is preferred for its advantages, such as cheaper, easier to use, smart notches, etc, when compared to the internal cooling. But it also arises challenges to control the RMS residual slope error of the mirror, whose requirement is less than 100 nano-radian. This requirement is even hard to fulfill, when combined with 1) the asymmetry thermal defor-mation on the meridian of the footprint area during the energy scanning, 2) the high heat load deduced by the synchrotron light and 3) the no obvious effects of the classical optimizations, such as increasing footprint size, cooling efficiency or adding smart notches. An effective way was found after numerous attempts, which is to make the footprint area far from the mirror¿s edge to reduce the asymmetry of the thermal deformation except for leading to a longer mirror. This paper will illustrate how the asymmetry affects the mirror¿s residual slope error and then, focus on the relationship among the asymmetry of cooling and the distance to provide a ref-erence for optical cooling.
	Poster THPPP007 [1.805 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP007
About •	Received ※ 26 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 March 2024
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THPPP008	Optimization of Thermal Deformation of a Horizontally Deflecting High-Heat-Load Mirror Based on eInGa Bath Cooling	radiation, factory, optics, undulator	283
	J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility. The synchrotron facility are developing towards higher brightness, lower divergence, narrower pulse, higher stability, etc. Therefore, the requirements of the first mirror of the beamline, who bear high-heat-load, were upgraded, and the performances of the mirror will be affected easily by other factors, such as flow induced vibration, clamping force, etc. Indirect water cooling based on eInGa bath is regarded as an effective mean to solve these thorny problems in designing of the first mirror cooling. However, for the case a horizontal de-flection mirror, the unilateral cooling method is usually adopted, resulting in some changes in the structure of the mirror. In this paper, a first mirror horizontally deflect-ing in Hefei advanced light source (HALF) are taken as examples to introduce the optimization method to achieve ultra-low meridian slope error of the first hori-zontal deflection mirror. The results show that this opti-mization method provides a rapid design mean to design the cooling scheme of the horizontally deflecting mirror based on the eInGa bath.
	Poster THPPP008 [2.901 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP008
About •	Received ※ 01 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 February 2024
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THPPP009	The Heat Load Calculation in the Grating-Based Beamline at Hefei Advanced Light Facility (HALF)	undulator, synchrotron-radiation, optics, radiation	287
	Z. Wang, J. Chen, X.W. Du, D. Feng, Q.P. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei diffraction limited light source. For the 4th generation synchrotron radiation (SR) light source, the heat load causes severe thermal deformation on the beamline optics as the emittance is reaching at the physical limit. The precise calculation of heat load on the optical elements is important for the thermal analysis including cooling method and thermal deformation simulation. A heat load calculation code has been developed for grating based SR beamline optics, which consists of modules of SR source simulation, mirror reflectivity and grating efficiency. The calculation results has been checked with SRCalc results. This code has been used to calculate the heat load of the Test Beamline optics at Hefei Advanced Light Facility (HALF). The heat absorbed by the first three optical elements¿including a toroidal mirror, a plane mirror and a plane grating¿is calculated. [1]R. Reininger. SRCalc (2001). Unpublished [2]L. Rebuffi, et.el., J. Synchrotron Radiat. 27: 1108-1120 (2020). [3]Z. Sun, et.al., The Innovation, 4 (6), 100514 (2023).
	Poster THPPP009 [1.853 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP009
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 09 January 2024
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THPPP012	Shape Optimization Design of Monochromator Pre-mirror in FEL-1 at S{³}FEL	FEL, laser, free-electron-laser, electron	293
	Z.M. Xu, C. Yang, W.Q. Zhang, Y.P. Zhong IASF, Shenzhen, Guangdong, People’s Republic of China
	For the monochromator pre-mirror in FEL-1 at S3FEL, the deformation induced by high heat load result in severe effects on the beam quality during its off-axis rotation. To meet the pre-mirror shape error requirement for X-ray coherent transport, an integra-tion of passive cooling and active heating systems for thermal management of the monochromator pre-mirror has been proposed, developed, and modelled. An ac-tive heating system with multiple electric heaters is adopted to compensate for the pre-mirror shape fur-ther. Finally, using MHCKF model, the optimization of multiple heat fluxes generated by all electric heaters was accomplished. The results show that the thermal management using passive cooling and active heat schemes is effective to obtain high-precision surface shape for the pre-mirror.
	Poster THPPP012 [0.772 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP012
About •	Received ※ 24 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 November 2023
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THPPP013	Studies on the Influences of Longitudinal Gradient Bending Magnet Fabrication Tolerances on the Field Quality for SILF Storage Ring	HOM, storage-ring, radiation, extraction	296
	J. Zhu, D.H. Liang, Y. Shi, C.G. Wang, M. Zhang IASF, Shenzhen, Guangdong, People’s Republic of China
	The advanced storage ring of 4th generation synchrotron radiation facility, known as the diffraction-limited storage ring (DLSR), is based on multi-bend achromat (MBA) lattices, which enable an emittance reduction of one to two orders of magnitude pushing beyond the radiation brightness and coherence reached by the 3rd generation storage ring. The longitudinal gradient bending (LGB) magnets, with multiple magnetic field stages in beam line direction, are required in the DLSR to reduce the emittance. The permanent magnet based LGB magnets are selected for the Shenzhen Innovation Light-source Facility (SILF) due to the advantages of operation economy, compactness and stability compare to the electro-magnet. In this paper, the influences of typical LGB magnet fabrication tolerances on the field qualities are presented using a dedicated parameterized finite element (FE) model, such as the poles height and width tolerances, the pole tips parallelism (in different orientations) and etc. Meanwhile the influences of permanent magnets discreteness and the magnetic forces (between top and bottom pole tips) induced yoke deformation on the field qualities are studied and presented.
	Poster THPPP013 [0.599 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP013
About •	Received ※ 27 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 08 May 2024
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THPPP014	A Special-Shaped Copper Block Cooling Method for White Beam Mirrors Under Ultra-High Heat Loads*	radiation, synchrotron-radiation, controls, simulation	299
	J.Y. Liu, H. Qin, X.X. Yan IASF, Shenzhen, Guangdong, People’s Republic of China
	In order to fulfil the more stringent requirements of op-tical figure accuracy for cooled X-Ray mirrors imposed to high heat loads, especially from advanced insertion de-vices in the diffraction limited storage rings (DLSR), investigations on the cooling system for white beam mirrors are conducted in this paper. A special-shaped copper block (SSCB) cooling method is proposed, using eutectic indium-gallium alloy as heat transfer medium. The SSCB cooling technology can keep a 550mm-length mirror slope error of 0.2 ¿rad (RMS) under 230 W absorp-tion heat power, showing great advantages in the accura-cy and flexibility for thermal deformation minimization when compared with the traditional ones.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP014
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 10 December 2023
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THPPP016	Numerical and Experimental Studies to Evaluate the Conservative Factor of the Convective Heat Transfer Coefficient Applied to the Design of Components in Particle Accelerators	experiment, simulation, HOM, storage-ring	306
	M. Quispe, J.J. Casas, C. Colldelram, M. Sanchez ALBA-CELLS, Cerdanyola del Vallès, Spain H. Bello La Romanica, Barberà del Vallès, Sabadell, Spain R. Capdevila, M. Rabasa, G.A. Raush ESEIAAT, Terrassa, Spain S. Grozavu Universidad Politecnica de Madrid, ETSI Aeronauticos, Madrid, Spain
	The fluid boundary condition applied to the design of components in Particle Accelerators is calculated as a global variable through experimental correlations coming from the literature. This variable, defined as the Convective Heat Transfer Coefficient, is obtained using the correlations of Dittus and Boelter (1930), Sieder and Tate (1936), Petukhov (1970), Gnielinski (1976), among others. Although the designs based on these correlations work properly, the hypothesis of the present study proposes that the effectiveness of these approximations is due to the existence of a significant and unknown conservative factor between the real phenomenon and the global variable. To quantify this conservative factor, this work presents research based on Computational Fluid Dynamics (CFD) and experimental studies. In particular, recent investigations carried out at ALBA confirm in a preliminary way our hypotheses for circular pipes under fully and non-fully developed flow conditions. The conclusions of this work indicate that we could dissipate the required heat with a flowrate lower than that obtained by applying the experimental correlations.
	Poster THPPP016 [1.419 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP016
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 March 2024
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THPPP023	Design and Test of a New Crystal Assembly for a Double Crystal Monochromator	monitoring, vacuum, photon, HOM	313
	Y. Yang, H. Liang, Z.K. Liu, Y.S. Lu, D.S. Shen, L. Zhang, S. Zhang, Y.S. Zhang IHEP, Beijing, People’s Republic of China
	Vertical diffraction monochromator is a typical optical device in synchrotron radiation device. Its main requirements and characteristics are high Angle accuracy and stability. Due to the high requirements of new light sources, high precision and high stability have become a common difficulty. This paper mainly introduces the design and test of an internal crystal module of HDCM. There are two main parts: the first crystal and the second crystal. The first crystal assembly includes crystal cooling and clamping, using microchannel edge cooling and flat plate clamping schemes. The second crystal component, through the motor to the top, drives the flexible hinge, and then realizes the rotation of the crystal. At the same time, the Angle monitoring system is designed. The design scheme is verified by processing. The shape of the clamping surface of a crystal component meets the requirements of use. The motion test of the two crystal components is carried out in the atmosphere, vacuum and low temperature vacuum environment, and the results are much higher than the required parameters. And the whole stability is tested. It has high stability.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP023
About •	Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 19 December 2023
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THPPP038	Girders for SOLEIL-II Storage Ring	dipole, storage-ring, lattice, alignment	332
	J. Da Silva Castro, S. Ducourtieux, Z. Fan, F. Lepage, A. Nadji, K. Tavakoli SOLEIL, Gif-sur-Yvette, France
	After two decades since its establishment, the SOLEIL Synchrotron facility needs to adapt to follow new scientific fields that have emerged since. After the Conceptual Design Report (CDR) phase for the facility Upgrade, the SOLEIL teams have been working for several months on the Technical Design Report (TDR). The ¿SOLEIL Upgrade¿ project is called ¿SOLEIL II¿ and is divided into several sub-projects. Among these sub-projects, one concerns storage ring Girders that will support all magnets of the new Lattice. These 86 Girders, each one supported by 2 plinths, must ensure an excellent degree of vibration stability. Before obtaining a final design for these Girders, a significant amount of study work has already been carried out (design, finite elements simulations, sub-assembly prototyping, dynamic measurements, tests, etc.). To validate the concepts, a fully equipped prototype girder was launched into manufacturing. In this contribution the preliminary studies and the ongoing investigations on SOLEIL II girder design will be presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP038
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 14 March 2024
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THPPP047	NEG Film Development and Massive Coating production for HEPS	vacuum, cathode, storage-ring, ECR	343
	Y.S. Ma, H. Dong, D.Z. Guo, P. He, F. Sun, Y.C. Yang IHEP, Beijing, People’s Republic of China T. Huang IHEP CSNS, Guangdong Province, People’s Republic of China
	Massive production facilities of NEG coated vacuum chambers have been developed for HEPS in Huairou, Beijing, which based on the NEG coating prototypes of HEPS-TF. The facilities can achieve simultaneous coating of 16~20 vacuum chambers of HEPS including irregular shaped vacuum chambers. The pumping per-formance of the NEG coated vacuum chambers has been measured by test facilities. After heating at 200°C for 24 hours, the highest pumping speed of H₂ is about 0.65 l/scm², and the highest capacity of CO is about 1.89×10^-5 mbar·L/cm². The lifetime is more than 20 cycles of air exposure and re-activation. The pumping performance meets the design requirements of HEPS. Currently the NEG coated vacuum chambers are applied to the storage ring of HEPS.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP047
About •	Received ※ 02 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 22 November 2023 — Issued ※ 18 July 2024
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THPPP052	Design and Development of Coated Chamber for In-Air Insertion Devices	vacuum, undulator, insertion-device, synchrotron-radiation	352
	P.C. Wang, Y. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China H. Dong, Y.S. Ma, Y.G. Wang, L. Zhang IHEP, Beijing, People’s Republic of China J.M. Liu, S.M. Liu, X.Y. Sun DNSC, Dongguan, People’s Republic of China B. Tan Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China B.L. Zhu IHEP CSNS, Guangdong Province, People’s Republic of China
	The insertion devices ¿ID¿is an important guarantee for further improving the performance of the light source to meet the needs of different users. For in-air ID (undulator, wiggler, etc.), the magnetic structure is in the air, and the vacuum chamber is in the middle of the magnetic structure to ensure the normal operation of the beam. In order to increase the magnetic field strength, the magnetic gap is generally relatively small. Factors such as small setting space, high precision, and low conductance all pose challenges to the design and processing of vacuum chamber. This paper introduces the development process of the vacuum chamber prototype of the coating type ID for the China ’s first diffraction-limited light source HEPS. The simultaneous analysis and vacuum pressure distribution calculation of the ID are carried out, and the NEG coating scheme is proposed as an more economical means to obtain ultra-high vacuum. The prototype NEG coating progress is introduced.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP052
About •	Received ※ 02 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 12 November 2023 — Issued ※ 18 July 2024
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FROAM02	Vacuum System of SPS-II: Challenges of Conventional Technology in Thailand New Generation Synchrotron Light Source	vacuum, simulation, photon, storage-ring	363
	T. Phimsen, S. Boonsuya, S. Chaichuay, S. Chitthaisong, N. Juntong, P. Klysubun, S. Prawanta, T. Pulampong, K. Sittisard, S. Srichan, P. Sudmuang, P. Sunwong SLRI, Nakhon-Ratchasima, Thailand
	Siam Photon Source II (SPS-II) is the first Thailand¿s 4th generation synchrotron light source. It not only provides high-energy and high-brightness synchrotron radiation for both academic and industrial research after its completion, but it is also strategically aimed to build up a stronger Thai industrial community during the design and construction period. Vacuum system is one of the systems expected to play a key role in leveling up the local manufacturing capability of the country. Most of the main components in the system are planned to domestically fabricate through technology transfer. Instead of NEG coating technology, this vacuum system design of SPS-II storage ring is based on the conventional technology which involves Thai industry potential and expertise. This paper reviews the challenges and adaptation of conservative design in dense DTBA magnet lattice with magnet aperture limitation. The vacuum chambers and bending magnets have been modified to accommodate IR beamlines which are included in the second phase plan. Pressure profile of the vacuum system in storage ring is evaluated. Then, the progress of overall vacuum system of SPS-II is described.
	Slides FROAM02 [14.635 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-FROAM02
About •	Received ※ 02 November 2023 — Revised ※ 08 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 March 2024
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Paper

Title

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TUOAM04

New Developments and Status of XAIRA, the New Microfocus MX Beamline at the ALBA Synchrotron

detector, optics, cryogenics, experiment

5

N. González, C. Colldelram, A. Crisol, D. Garriga, J. Juanhuix, J. Nicolàs, M. Quispe, I. Šics
ALBA-CELLS, Cerdanyola del Vallès, Spain

The new BL06-XAIRA microfocus macromolecular crystallography beamline at ALBA synchrotron is currently under commissioning and foreseen to enter into user operation in 2024. The aim of XAIRA is to provide a 4-14 keV, stable, high flux beam, focused to 3×1 µm2 FWHM. The beamline includes a novel monochromator design combining a cryocooled Si(111) channel-cut and a double multilayer diffracting optics for high stability and high flux; and new mirror benders with dynamical thermal bump and figure error correctors. In order to reduce X-ray parasitic scattering with air and maximize the photon flux, the entire end station, including sample environment, cryostream and detector, is enclosed in a helium chamber. The sub-100nm SoC diffractometer, based on a unique helium bearing goniometer also compatible with air, is designed to support fast oscillation experiments, raster scans and helical scans while allowing a tight sample to detector distance. The beamline is also equipped with a double on-axis visualization system for sample imaging at sub-micron resolutions. The general status of the beamline is presented here with particular detail on the in-house fully developed end station design.

Slides TUOAM04 [6.526 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM04

About •

Received ※ 27 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 15 May 2024

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOAM05

Thermal-Deformation-Based X-Ray Active Optics Development in IHEP

optics, vacuum, radiation, synchrotron-radiation

10

F.G. Yang, D.Z. Diao, H. Dong, J. Han, M. Li, W.F. Sheng, S.F. Wang, X.W. Zhang
IHEP, Beijing, People’s Republic of China
L. Kang
IHEP CSNS, Guangdong Province, People’s Republic of China

Funding: National Natural Science Foundation of China (11505212, 11875059); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2019012).
Advanced light source require small wavefront distortion to maintain the quality of the X-ray beam. Active optical wavefront correction technology is a very important solution to solve the service problems of ultra-precise devices under such conditions. In this paper, we will report our recent progress on this active optics system development including surface metrology and mirror modulation. Based on the research of laser-heating-based thermal deformation modulation technology, this project proposes to modify the mirror surface of X-ray mirrors based on semiconductor microfabrication process, and modulate the local deformation of the mirror surface by electric heating to realize the surface shape correction /modulation of X-ray mirrors. Since the modulation unit acts directly on the reflective region of the mirror surface, it has a better surface shape correction capability than the conventional body deformation modulation. The solution also has the advantage of high efficiency and low cost.
*Yang F, Li M, Gao L, et al. Laser-heating-based active optics for synchrotron radiation applications[J]. Optics Letters, 2016, 41(12): 2815-2818.

Slides TUOAM05 [18.205 MB]

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reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM05

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Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 February 2024

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TUOBM02

SAPOTI - The New Cryogenic Nanoprobe for the CARNAÚBA Beamline at Sirius/LNLS

cryogenics, controls, vacuum, focusing

19

R.R. Geraldes, G.G. Basilio, D.N.A. Cintra, V.B. Falchetto, D. Galante, R.C. Gomes, A.Y. Horita, L.M. Kofukuda, F.R. Lena, M.B. Machado, Y.A. Marino, E.O. Pereira, P.P.R. Proença, C.A. Pérez, M.H. Siqueira da Silva, A.P.S. Sotero, V.C. Teixeira, H.C.N. Tolentino
LNLS, Campinas, Brazil

Funding: Brazilian Ministry of Science, Technology and Innovation (MCTI)
SAPOTI will be the second nanoprobe to be installed at the CARNAÚBA (Coherent X-Ray Nanoprobe Beamline) beamline at the 4th-generation light source Sirius at the Brazilian Synchrotron Light Laboratory (LNLS). Working in the energy range from 2.05 to 15 keV, it has been designed for simultaneous multi-analytical X-ray techniques, including absorption, diffraction, spectroscopy, fluorescence and luminescence, and imaging in 2D and 3D. Highly-stable fully-coherent beam with monochromatic flux up to 10¹¹ph/s/100mA-/0.01%BW and size between 35 and 140 nm is expected with an achromatic KB (Kirkpatrick-Baez) focusing optics, whereas a new in-vacuum high-dynamic cryogenic sample stage has been developed aiming at single-nanometer-resolution images via high-performance 2D mapping and tomography. This work reviews and updates the entire high-performance mechatronic design and architecture of the station, as well as the integration results of its several modules, including automation, thermal management, dynamic performance, and positioning and scanning capabilities. Commissioning at the beamline is expected in early 2024.

Slides TUOBM02 [45.929 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM02

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Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 11 February 2024

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TUOBM06

MINERVA, a New X-ray Facility for the Characterization of the ATHENA Mirror Modules at the ALBA Synchrotron

vacuum, optics, detector, MMI

28

A. Carballedo, J.J. Casas, C. Colldelram, A. Crisol, G. Cuní, D. Heinis, J. Nicolàs, A. Sánchez, N. Valls Vidal
ALBA-CELLS, Cerdanyola del Vallès, Spain
N. Barrière, M.J. Collon, G. Vacanti
Cosine Measurement Systems, Warmond, The Netherlands
M. Bavdaz, I. Ferreira
ESA-ESTEC, Noordwijk, The Netherlands
L. Cibic, M. Krumrey, D. Skroblin
PTB, Berlin, Germany

Funding: MINERVA is funded by the European Space Agency (ESA) and the Spanish Ministry of Science and Innovation.
In this paper we present the newly built beamline MINERVA, an X-ray facility at the ALBA synchrotron. The beamline has been designed to support the development of the X ray observatory ATHENA (Advanced Telescope for High Energy Astrophysics). MINERVA will host the necessary metrology equipment to integrate the stacks produced by cosine in a mirror module (MM) and characterize their optical performances. The optical and mechanical design is based on the XPBF 2.0 from the Physikalisch-Technische Bundesanstalt (PTB), at BESSY II already in use to this effect and its construction is meant to significantly augment the capability to produce MM. The development of MINERVA has addressed the need for improved technical specifications, overcome existing limitations and achieve enhanced mechanical performances. We describe the design, construction process and implementation of Minerva that lasted three years. Even though the beamline is still under a commissioning phase, we expose tests and analysis that have been recently performed, remarking the improvements accomplished and the challenges to overcome, in order to reach the operational readiness for the mirror modules mass production.

Slides TUOBM06 [47.675 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM06

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Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 09 February 2024

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TUPYP001

Shining Light on Precision: Unraveling XBPMs at the Australian Synchrotron

laser, feedback, monitoring, photon

33

B. Lin, J. McKinlay, S. Porsa, Y.E. Tan
AS - ANSTO, Clayton, Australia

At the Australian Synchrotron (AS), the need for nondestructive X-ray beam positioning monitors (XBPM) in the beamline front ends led to the development and installation of an in-house prototype using the photoelectric effect in 2021. This prototype served as a proof of concept and an initial step towards creating a customised solution for real time X-ray position monitoring. Of the new beamlines being installed at the AS, the High-Performance Macromolecular Crystallography (MX3) and Nanoprobe beamlines require XBPMs due to their small spot size and high stability requirements. However, a significant hurdle is the short distance from the source point to the XBPM location, resulting in an extremely restricted aperture to accurately monitor the beam position. Scaling down the photoelectric prototype to accommodate the available space has proven challenging, prompting us to explore alternative designs that utilize temperature-based methods to determine the beam position. This paper details insights made from investigating this alternative method and design.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP001

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Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 February 2024

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TUPYP008

Exactly Constrained, High Heat Load Design for SABIA’s First Mirror

vacuum, MMI, alignment, monitoring

44

V.B. Zilli, G.G. Basilio, J.C. Cezar, F.A. Del Nero, G.R.B. Ferreira, B.A. Francisco, M.E.O.A. Gardingo, R.R. Geraldes, A.C. Pinto, G.L.M.P. Rodrigues, L.M. Volpe, V.S. Ynamassu, R.G. de Oliveira
LNLS, Campinas, Brazil
C. Ambrosio
CNPEM, Campinas, SP, Brazil

Funding: Ministry of Science, Technology and Innovation (MCTI)
The SABIA beamline (Soft x-ray ABsorption spectroscopy and ImAging) will operate in a range of 100 to 2000 eV and will perform XPS, PEEM and XMCD techniques at SIRIUS/LNLS. Thermal management on these soft x-ray beamlines is particularly challenging due to the high heat loads. SABIA’s first mirror (M1) absorbs about 360 W, with a maximum power density of 0.52 W/mm², and a water-cooled mirror was designed to handle this substantial heat load. To prolong the mirror operation lifetime, often shortened on soft X-ray beamlines due to carbon deposition on the mirror optical surface, a procedure was adopted using high partial pressure of O₂ into the vacuum chamber during the commissioning phase. The internal mechanism was designed to be exactly constrained using folded leaf springs. It presents one degree of freedom for control and alignment: a rotation around the vertical axis with a motion range of about ±0.6 mrad, provided by a piezoelectric actuator and measured using vacuum compatible linear encoders. This work describes the SABIA’s M1 exactly constrained, high heat absorbent design, its safety particularities compared to SIRIUS typical mirrors, and validation tests results.

Poster TUPYP008 [1.582 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP008

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Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 21 February 2024

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TUPYP017

Design and Test of Precision Mechanics for High Energy Resolution Monochromator at the HEPS

experiment, photon, controls, GUI

51

L. Zhang, H. Liang, Z.K. Liu, W. Xu, Y. Yang, Y.S. Zhang
IHEP, Beijing, People’s Republic of China

A monochromator stands as a typical representative of optical component within synchrotron radiation light sources. High resolution monochromators (HRMs), which incorporate precision positioning, stability control, and various other technologies, are a crucial subclass within this category. The next generation of photon sources imposes higher performance standards upon these HRMs. In this new design framework, the primary focus is on innovating precision motion components. Rigorous analysis and experimentation have confirmed the effectiveness of this design. This structural model provides valuable reference for developing other precision adjustment mechanisms within the realm of synchrotron radiation.

Poster TUPYP017 [3.641 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP017

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Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 February 2024

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TUPYP022

The Development and Application of Motion Control System for HEPS Beamline

controls, interface, EPICS, hardware

61

Z.Y. Yue, X.B. Deng, Z.H. Gao, G. Li, Y. Liu, C.X. Yin, D.S. Zhang, Q. Zhang, A.Y. Zhou
IHEP, Beijing, People’s Republic of China

In synchrotron radiation facilities such as the High Energy Photon Source (HEPS) beamline, thousands of motorized actuators are equipped on different optical devices, such as K-B mirrors, monochromator and transfocators, in order to acquire the specified properties of X-ray. The motion control system, as a part of the ultra-precision mechatronics devices, is used to precison positioning control, which not only has ability to realize basic motion functions but also can handle complex motion control requirements. HEPS has developed a standardized motion control system(MCS) for synchrotron radiation applications. In this paper, The structure of hardware and software of MCS will be presented, and some applications are demonstrated in detail.

Poster TUPYP022 [0.847 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP022

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Received ※ 30 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024

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TUPYP026

Influence of the Groove Curvature on the Spectral Resolution in a Varied-Line-Spacing Plane Grating Monochromator (VLS-PGM)

photon, factory, target, experiment

67

J. Du, X.W. Du, Q.P. Wang, Z. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Diffraction-limited synchrotron radiation (DLSR) light source with smaller source size and emittance makes ultra-high spectral resolution beamline possible. Here, we report an undulator-based beamline optical design with ultra-high spectral resolution using a varied-line-spacing plane grating monochromator (VLS-PGM), which is a well-proven design for achieving ultra-high resolution in the soft X-ray band. A VLS plane grating with a central groove density of 2400 l/mm is utilized to cover the photon energy region of 250 ~ 2000eV. VLS gratings are generally fabricated using the holographic method, but the resulting grating grooves are two-dimensionally curved curves, which can affect the resolution of the monochromator. To analyse this effect, we first use a spherical wavefront and an aspherical wavefront to generate the fringes and optimized the recording parameters. We also present a method for calculating the groove curvature of holographic plane VLS grating grooves. Furthermore, the influence of grating groove curvature on beamline resolution is theoretically analysed based on the aberration theory of concave grating.

Poster TUPYP026 [0.480 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP026

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Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 12 March 2024

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TUPYP027

A Subnanometer Linear Displacement Actuator

site, laser, vacuum, experiment

70

S.K. Jiang, X.W. Du, Q.P. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

With the development of synchrotron radiation technology, an actuator with sub-nanometer resolution, 100N driving force, and compatible with ultra-high vacuum environment is required. To achieve synchrotron radiation micro-nano focusing with adjustment resolution of sub-nanometer and high-precision rotation at the nano-arc level, most of the commercial piezoelectric actuators are difficult to meet the requirements of resolution and driving force at the same time. The flexure-based compound bridge-type hinge has the characteristic of amplifying or reducing the input displacement by a certain multiple, and can be used in an ultra-high vacuum environment. According to this characteristic, the bridge-type composite flexible hinge can be combined with commercial piezoelectric actuators, to design a new actuator with sub-nanometer resolution and a driving force of 100N. This poster mainly presents the principle of the new actuator, the design of the prototype and the preliminary test results of its resolution, stroke.

Poster TUPYP027 [3.140 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP027

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Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 January 2024

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TUPYP028

Thermal Analysis Software for Optical Elements of Hefei Advanced Light Facility*

software, optics, interface, radiation

73

M.H. Lin, J. Chen, S.K. Jiang, Q.P. Wang, Z. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Thermal deformation is a key influencing factor in the surface shape of optical components for beamline optics. In the process of beamline design, it is necessary not only to select different cooling schemes based on thermal loading conditions but also to extensively optimize the parameters of these cooling schemes. The traditional approach for optimizing cooling scheme design often requires significant manual effort. By integrating existing experience in optimizing cooling scheme designs, this study transforms the parameterized design tasks that were originally performed manually into automated processes using software. This paper presents the latest advancements in the automated design software for cooling schemes of beamline optical components, and the results indicate that the optimization outcomes of the existing automated design software are close to those achieved through manual optimization.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP028

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Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 03 December 2023

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TUPYP030

The Design of High Stability Double Crystal Monochromator for HALF

vacuum, optics, cryogenics, radiation

76

Z.L. Xu, J. Chen, X.W. Du, Y. Peng, Q.P. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

HALF is a fourth-generation synchrotron light source with a number of state-of-the-art beamlines. Naturally, the new 4th generation machines, with their small emittances, start to bring higher stability performance requirements. In response to these problems, an concept of a high stability DCM (Double Crystal Monochromator) with angular range between 14 and 81 degrees (equivalent to 2 to 8 keV with Si(111)) has been developed at the National Synchrotron Radiation Laboratory. This poster gives an overview of the DCM prototype project including specifications, Mechanical design, heat load management and stability consideration.

Poster TUPYP030 [1.221 MB]

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reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP030

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Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 24 January 2024

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TUPYP032

An Argon-Oxygen or Argon-Hydrogen Radio-Frequency Plasma Cleaning Device for Removing Carbon Contamination from Optical Surfaces

plasma, vacuum, radiation, experiment

79

H.J. Yuan, X.W. Du, Q.P. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Due to synchrotron radiation, carbon contamination on the surfaces of optical elements inside the beamlines, such as mirrors and gratings, remains an issue. Future beamline designs will select more optical element surface coating materials according to the specific needs, including gold, platinum, chromium, nickel, and aluminum, and a single cleaning method will not be able to adequately address the demands. We have studied the RF plasma cleaning of optical elements. After the argon/oxygen or argon/hydrogen gas mixture was injected into the chamber, glow discharge was carried out, and the carbon on the surface of the inert metal-coated optical element and oxidation-prone metal-coated optical element was removed by the oxidation or reduction reaction of radicals. In order to optimize the discharge parameters, it utilizes a differential mass spectrometry system and an optical emission spectrometer to monitor the cleaning process. This paper introduces the principles of the two cleaning methods as well as our existing cleaning device.

Poster TUPYP032 [2.493 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP032

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Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 19 December 2023

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TUPYP037

Mechanical Design of Multilayer Kirkpatrick-Baez (KB) Mirror System for Structural Dynamics Beamline (SDB) at High Energy Photon Source (HEPS)

simulation, optics, experiment, photon

82

R.Y. Liao, L. Gao, Z.N. Ou, S. Tang, H.H. Yu, B.B. Zhang
IHEP, People’s Republic of China

SDB aims in-situ real-time diagnosis in dynamic compression science and additive manufacturing. Nano-experimental environment requires highly multilayer KB mirror system in thermal deformation and stability of mechanism. This paper illustrates the KB cooling scheme and mechanical design. Only using variable-length water cooling to control the temperature and thermal deformation of mirror has limitations here. First, the installation of cooling system should be non-contact so that the surface shape can be sophisticatedly controlled without deformation of chucking power. Second, the distance between the HKB and the sample stage is too small to arrange the cooling pipe. Third, the KB mirror has multi-dimensional attitude adjustment. Cu water cooling pipe would be dragged with adjustment thus it has to be bent for motion decoupling, which occupies considerable space. Thus, the Cu cooling block and water cooling pipe are connected by copper braid. Eutectic Gallium-Indium fills a 100 ¿m gap between the cooling block and KB mirror to avoid chunking power deformation. Finally, the structural stability and chamber sealability is analyzed.

Poster TUPYP037 [1.234 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP037

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Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024

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TUPYP039

A Design of an X-ray Monochromatic Adjustable Slit for HEPS Beamlines

GUI, vacuum, controls, collimation

88

S. Liu, Q.H. Duan, Q. Han, Z. Li, J.L. Yang, Z.Y. Yue, Q. Zhang, Z.B. Zhang
IHEP, People’s Republic of China

The monochromatic slit is a commonly used device in HEPS beamlines. It can limit the synchrotron beam-spot within a desired size required by the downstream optical equipment. In addition, the four-blade structure is the most widely used form of slit. The slit with this form usually consists of a pair or two parallel tungsten carbide blades. With their edges close to each other, a slit can be formed, and the size of which can be controlled by micromechanical guides. This structure is very suitable for the case of large beamsize. In this work, we have designed a monochromatic slit based on the four-blade form for BF-beamline in HEPS. It can be used in ultra-high vacuum, high luminous flux working environment. The maximum opening range is up to 30mm*10mm (H*V), while it can allow a white beam of 136mm*24mm (H*V) to pass through. Furthermore, we adopted a point to surface contact design, which can effectively avoid the over-constraint problem between two guide rails.

Poster TUPYP039 [0.457 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP039

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Received ※ 10 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024

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TUPYP050

Design and Calculation of Vacuum System for WALS Storage Ring

vacuum, photon, storage-ring, radiation

105

C.Y. Liu, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, Y. Nie, J. Wang, Y. Wang, G. Wei, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou
IAS, Wuhan City, People’s Republic of China

Funding: * Work supported by the Key R&D Project of Hubei Provincial Department of Science and Technology, No. 2021AFB001.
Wuhan Advanced Light Source (WALS) is a fourth-generation synchrotron radiation facility with 1.5 GeV designed energy and 500 mA beam current. The storage ring vacuum system has to be designed in such a way which is compatible with a multi-bend achromat (MBA) compact lattice. the new technology of non-evaporable getter (NEG) coating was used, which is more and more popular in accelerator equipment. The design of the whole vacuum chamber and the nec-essary calculations were posted in the paper. The results indicated that the design of the vacuum system can meet the design requirement.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP050

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Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024

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TUPYP053

Current Status of Vibration Monitoring System at SOLARIS

operation, storage-ring, software, monitoring

111

M. Piszak
NSRC SOLARIS, Kraków, Poland

Solaris synchrotron radiation centre, despite being relatively new facility, began expansion of its experimental hall in 2022 in order to accommodate new beamlines. The construction works were carried out along with regular accelerators and beamlines operation and generated high levels of vibration. To better understand the influence of vibrations on electron and x-ray beams¿ stability, an accelerometer-based monitoring system was designed and implemented. The system consists of a triaxial measurement point equipped with seismic accelerometers located on bending magnet inside storage ring and a central signal conditioning and acquisition point. The results of long-term vibration data collection and analysis will be presented along with plans for the future system expansion.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP053

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Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 December 2023

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TUPYP055

Application of QXAFS in the Medium-Energy X-ray Absorption Spectroscopy

experiment, data-acquisition, SRF, synchrotron-radiation

118

Y.H. Xia, J.F. Chang, S.Q. Chu, S.H. Liu, F.F. Yang, G.K. Zhang, H.Y. Zhang, J. Zhang, L. Zheng
IHEP, Beijing, People’s Republic of China

X-ray absorption fine-structure (XAFS) spectroscopy, including X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), is an important experimental method at synchrotron radiation facilities, which has been applied in scientific research and industry applications. Traditional XAFS spectrum is obtained by controlling the rotation of the monochromator by a stepper driver, then measuring the absorption coefficient of each energy point. While in quick-scanning XAFS (QXAFS), the angle of the monochromator moves continuously and quickly, greatly reducing the spectral acquisition time. It has become a powerful tool to study in-situ dynamic processes. Currently QXAFS is mainly used in hard X-ray absorption spectroscopy beamlines of synchrotron radiation facilities, here we have developed a QXAFS system in the medium-energy X-ray beamlines, which will improve the function of XAFS beamlines and extend their capabilities to a wider user community.

Poster TUPYP055 [0.689 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP055

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Received ※ 04 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 November 2023

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WEOAM02

A Vacuum Aspirated Cryo Cooling System (VACCS)

controls, cryogenics, vacuum, optics

121

G.M.A. Duller, D.L. Magrath, M. Nagy, B. Olafsson
DLS, Oxfordshire, United Kingdom

The use of liquid nitrogen for cooling of synchrotron equipment is widespread. The cryogenic sub-coolers commonly employed come with some significant drawbacks such as cost, complexity, stiffness of distribution lines, and vibration induced by pressure variations. The typical sub-cooler is capable of handling 2-3kW of absorbed power whilst many optics require no more than 50-150W of cooling. We present a Vacuum Aspirated Cryo-cooling System (VACCS) which overcomes many of these disadvantages and which allows cryo-cooling to be implemented more widely. The VACCS system uses a vacuum, generated with no moving parts, to draw LN2 through a heat exchanger. Thus the system does not have to be pressure rated. We describe our designs for highly flexible distribution lines. A simple control system offers variable temperature at the heat exchanger by varying the flowrate of LN2. A system is installed at Diamond which allows the independent control of three zones. A test rig has demonstrated cooling capacity in excess of 100W for a monochromator crystal assembly and controlled temperatures -194¿-120C.

Slides WEOAM02 [21.578 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM02

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Received ※ 31 October 2023 — Revised ※ 27 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024

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WEOBM01

Challenges and Solutions for the Mechanical Design of SOLEIL-II

dipole, lattice, vacuum, storage-ring

133

K. Tavakoli, F. Alves, G. Baranton, Y. Benyakhlef, A. Berlioux, A. Carcy, M.-E. Couprie, J. Da Silva Castro, S. Ducourtieux, Z. Fan, C. Herbeaux, C.A. Kitégi, A. Le Jollec, F. Lepage, V. Leroux, A. Loulergue, F. Marteau, A. Mary, A. Nadji, S. Pautard, V. Pinty, M. Ribbens, T.S. Thoraud
SOLEIL, Gif-sur-Yvette, France

The Synchrotron SOLEIL is a large-scale research facility in France that provides synchrotron radiation from terahertz to hard X-rays for various scientific applications. To meet the evolving needs of the scientific community and to remain competitive with other European facilities, SOLEIL has planned an upgrade project called SOLEIL-II. The project aims to reconstruct the storage ring as a Diffraction Limited Storage Ring (DLSR) with a record low emittance which will enable nanometric resolution. The mechanical design of the upgrade project involves several challenges such as the integration of new magnets, vacuum chambers, insertion devices and beamlines in the existing infrastructure, the optimization of the alignment and stability of the components, and the minimization of the downtime during the transition from SOLEIL to SOLEIL-II. The mechanical design is mainly based on extensive simulations, prototyping and testing to ensure the feasibility, reliability, and performance of several key elements. This abstract presents an overview of the mechanical design concepts and solutions adopted for the SOLEIL-II project.

Slides WEOBM01 [8.729 MB]

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reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM01

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Received ※ 25 September 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 03 April 2024

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEOBM02

Development of the Bent Focusing Mirror in HEPS from Design to Test

focusing, ECR, SRF, photon

136

M.W. Chen, M. Li, S. Tang, F.G. Yang
IHEP, People’s Republic of China

The focusing mirrors are important for each beamline in the 4th generation photon source. One bent focusing face-down mirror in HEPS is taken for an example to be introduced from the design to the test. The effect of the gravity of the mirror is considered in the design. Moreover, for the sake of the compromise between the processing and the precision, the polygonal structure is adopted. Also, the iteration of the solution is improved to increase the design efficiency. The results reveal that the theoretical precision of the mirror after bending can reach less than 100 nrad RMS. In the aspect of the mechanics, the scheme of four roller bender comes out to avoid the parasitic moment, and the movable component in the bender are all coated with the MoS2. As the type of the measurement is facing side which is different from the type of the actual condition, the effect of the gravity must be included in the metrology results. In the meantime, the stability and the repeatability are also measured. The result can be converged to around 200 nrad RMS, which is less than the required error. The stability, ¿R/R, can be constrained under the 0.6%, showing the outstanding performance.

Slides WEOBM02 [3.638 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM02

About •

Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 16 April 2024

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WEOBM03

The Design and Progress of the Network and Computing System for HEPS

software, data-analysis, network, data-management

139

H. Hu, Y.S. Cheng, Q. Hu, Y. Hu, F.Z. Qi, X.H. Wang, S. Zeng, H.M. Zhang
IHEP, Bejing, People’s Republic of China

The 14 beamlines for the phase I of High Energy Photon Source(HEPS) will produces more than 300PB/year raw data. Efficiently storing, analyzing, and sharing this huge amount of data presents a significant challenge for HEPS. HEPS Computing and Communication System(HEPSCC), also called HEPS Computing Center, is an essential work group responsible for the IT R&D and services for the facility, including IT infrastructure, network, computing, analysis software, data preservation and management, public services etc. Aimed at addressing the significant challenge of large data volume, HEPSCC has designed and established a network and computing system, making great progress over the past two years.

Slides WEOBM03 [2.921 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM03

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Received ※ 27 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 09 December 2023

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WEOBM05

Thermal Calculation and Testing of SLS 2.0 Crotch Absorbers

simulation, storage-ring, GUI, synchrotron-radiation

145

X. Wang, B.S. Bugmann, R. Ganter, M. Maeher, C. Rosenberg, A. Weber
PSI, Villigen PSI, Switzerland

The storage ring of SLS2.0 based on a multibend achromat lattice will have the maximum electron energy of 2.7 GeV. The synchrotron radiation emitted by bending magnets, except for a small portion designated to beamlines, will be dissipated by crotch absorbers to protect downstream vacuum elements. SLS2.0 crotch absorbers are designed to have two water-cooled, toothed jaws made of Glidcop to dissipate a maximum heat power of 6 kW. Finite element analysis has been conducted to validate the thermal and mechanical strength of the absorbers’ mechanical design. A conjugate heat transfer (CHT) simulation, utilizing direct coupled solid and fluid zones with Computational Fluid Dynamics (CFD) software ANSYS Fluent, was performed to verify the water cooling concept. Furthermore, a prototype absorber underwent testing in an e-beam welding chamber, where the temperatures of the absorber and cooling water were measured and compared against calculated values. The test results not only confirmed the absorber’s ability to dissipate the specified heat load but also validated the thermal modelling methods. This presentation will focus on aspects of numerical simulation and thermal testing.

Slides WEOBM05 [5.159 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM05

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Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 March 2024

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WEOBM07

Design, Modeling and Analysis of a Novel Piezoactuated XY Nanopositioner Supporting Beamline Optical Scanning

simulation, coupling, GUI, controls

150

L.F. Wang, G.C. Chang, S. Tang, Z.Y. Yue, L. Zhang
IHEP, Beijing, People’s Republic of China

In recent years, with the advancement of X-ray optics technology, the spot size of synchrotron beamlines has been reduced to 10nm or even smaller. The reduction in spot size and the emergence of ultra-bright synchrotron sources necessitate higher stability, resolution, and faster scanning speeds for positioning systems. This paper presents the design, analysis, and simulation of an XY piezoelectric driven nanopositioning platform that supports high-precision optical scanning systems. To achieve fast and highly precise motion under the load of an optical system, a design scheme based on a hollow structure with flexible amplification and guiding mechanisms is proposed. This scheme increases displacement output while minimizing coupling displacement to ensure a high natural frequency. The rationality of this platform design is verified through modeling and finite element simulation.

Slides WEOBM07 [3.448 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM07

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Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 18 April 2024

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WEPPP002

The Status of the High-Dynamic DCM-Lite for Sirius/LNLS

controls, MMI, alignment, vacuum

154

G.S. de Albuquerque, J.P.S. Furtado, N.P. Hara, M. Saveri Silva, T.R. Silva Soares
LNLS, Campinas, Brazil

Funding: Ministry of Science, Technology and Innovation (MCTI)
Two new High-Dynamics Double Crystal Monochromators (HD-DCM-Lite) are under installation for QUATI (superbend) and SAPUCAIA (undulator) beamlines at Sirius. The HD-DCM-Lite portrays an updated version of Sirius LNLS HD-DCMs not only in terms of being a lighter equipment for sinusoidal scans speeds with even higher stability goals, but also bringing forward greater robustness for Sirius monochromators projects. It takes advantage of the experience gained from assembly and operation of the previous versions during the last years considering several work fronts, from the mechanics of the bench and cooling systems to FMEA, alignment procedures and control upgrades. In this work those challenges are depicted, and first offline results regarding thermal and dynamical aspects are presented.

Poster WEPPP002 [7.970 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP002

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Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 11 December 2023

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WEPPP009

POLAR Synchrotron Diffractometer

detector, alignment, scattering, simulation

161

G. Olea, N. Huber, J. Zeeb
HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany

A new product for research purposes aiming to work in a synchrotron facility after its upgradation (APS-U) has been recently developed. Based on specific beam characteristics (emittance, coherence, variable polarization) and several X-ray diffraction (XRD) techniques applied (resonant, reflectivity) on single crystal and thin films under extreme conditions (temperature, pressure), the product is expected to fast progress the investigations of magnetic materials at nanoscale level. The dedicated machine (diffractometer) will be in one of the newly constructed experimental enclosure (G) of a main beamline (POLAR) in the 4th (ID-4) sector, serving a large spectrum of investigations for Magnetic Material (MM) group. POLAR-Dm was conceived on a traditional 6C (C-circles) geometry, maintaining the common kinematic structural principle of its family. With the addition of several interchangeable positioning devices (e.g., Euler cradle, air bearings stages, etc) the system is expanding the spectrum of possible investigations, maintaining the precision of new setups. The kinematic, design and precision concepts applied, together with the obtained test results are all in detail presented.
* J. Strempfer et al., Possibilities at Polar beamline with APS-U, 14th Int. Conf. SRI2021, J. Phys., 2380 (2022) 012038
** HUBER Diffractionstechnik GmbH&Co.KG, 2023, www.xhuber.com

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP009

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Received ※ 02 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 28 February 2024

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WEPPP015

Progress of Front Ends at HEPS

photon, radiation, insertion-device, storage-ring

175

H. Shi, P. Luo, Y.X. Ma, Y. Tan, H.Y. Wang
IHEP, Beijing, People’s Republic of China

High Energy Photon Source (HEPS) is a 6GeV synchrotron radiation facility building in Huairou, with a storage ring perimeter of 1390.6m and 41 straight sections. In phase I, 15 front ends will be installed, including 14 insertion device front ends and 1 bending magnet front end. These front ends are divided into three types: the Undulator front end, the Wiggler front end, and the BM front end. The U-type front end will receive 766W/mrad² of peak power density and 25kW of the total power. The design of the W-type front end is based on compatibility with various insertion devices, including udulators and wigglers. In this paper, the designs and the progress of HEPS front ends are presented.

Poster WEPPP015 [2.147 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP015

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Received ※ 01 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 January 2024

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WEPPP016

Mechanical Design of XRS & RIXS Multi-Functional Spectrometer at the High Energy Photon Source

scattering, photon, synchrotron-radiation, radiation

178

J.C. Zhang, Z.Y. Guo, X. Jia, S.X. Jin, Z.N. Ou, W.F. Sheng, S. Tang, R.Z. Xu, W. Xu, Y.J. Zhang
IHEP, Beijing, People’s Republic of China

The integration of an X-ray Raman spectroscopy (XRS) spectrometer and a Resonant Inelastic X-ray scattering (RIXS) spectrometer at HEPS is described. The XRS has 6 regular modular groups and 1 high resolution modular group. In total 90 pieces of spherically bent analyzer crystals are mounted in low vacuum chambers with pressure lower than 100Pa. On the other hand, the RIXS spectrometer possesses one spherically bent analyzer crystal configured in Rowland geometry whose diameter is changeable from 1m to 2m. The scattering X-ray photons transport mostly in helium chamber to reduce absorption by air. The RIXS and the high resolution module can be exchanged when needed. Six air feet are set under the granite plate to unload the weight when the heavy spectrometer is aligned. The natural frequency and statics of the main granite rack were analyzed and optimized to maintain high stability for the HEPS-ID33 beamline at the 4th generation source. A type of compact and cost-effective adjustment gadget for the crystals was designed and fabricated. Economic solutions in selection of motors and sensors and other aspects were adopted for building the large spectrometer like this.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP016

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Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 April 2024

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WEPPP019

Coating Removal of Silicon-Based Mirror in Synchrotron Radiation by Soluble Underlayers

optics, synchrotron-radiation, radiation, photon

181

Q. Hou, G.C. Chang, B. Ji, M. Li, S.P. Yue
IHEP, People’s Republic of China

Multilayer optics is widely used for the x-ray beam monochromatization, focusing, and collimation in synchrotron light source. However, the multilayer coatings might be damaged by the high heat loads, the poor film adhesion, the high internal stress, or the inadequate vacuum conditions. As a result, it is essential to develop a method to make the optical substrate reusable without compromising its quality. In our published work, we successfully prepared a W/B4C multilayer coating with a 2 nm Cr buffer layer on a small-sized Si wafer. The coating was stripped from the Si substrate by dissolving the Cr buffer layer using an etchant. After the etching process, the sample’s roughness was comparable to that of a brand-new substrate. We have since utilized this method to clean the multilayers on the surface of a 20 cm × 5 cm silicon-based mirror for High Energy Photon Source (HEPS). The surface roughness and shape were measured, and they reached the level of a brand-new mirror.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP019

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Received ※ 02 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 19 December 2023

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WEPPP025

Application of CuCrZr in the Front-end of Shanghai Synchrotron Radiation Facility

vacuum, radiation, synchrotron-radiation, SRF

187

S. Wu, Y. Li, J.N. Liu, J.W. Wang
SARI-CAS, Pudong, Shanghai, People’s Republic of China

Glidcop, oxygen free copper and other materials are mainly used in the Front-end of the Shanghai Synchrotron Radiation Facility(SSRF). CuCrZr material has high heat load capacity, high yield strength and tensile strength, good thermal conductivity and low vacuum outgassing rate. At present, it has been used as a heat sink material in the heat exchanger of nuclear reactors. In this paper, based on the previous process exploration, the Front-end absorber is made of CuCrZr material, and the technical scheme of integral processing of flange and absorber is adopted. The thermal stress and deformation of CuCrZr absorber are analyzed by finite element method, and the processing of CuCrZr absorber is completed, and it is applied to the SSRF BL04Ucanted front end. After a period of electron beam cleaning, vacuum and temperature tests were carried out under high thermal load power, and the characteristics of the material in practical use were analyzed, which proved that CuCrZr material can be used in SSRF under high heat load.

Poster WEPPP025 [0.815 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP025

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Received ※ 01 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 December 2023

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WEPPP029

A Novel Flexible Design of the FaXToR End Station at ALBA

detector, GUI, photon, experiment

190

L.R.M. Ribó, N. González, L. Nikitina, A.P. Patera
ALBA-CELLS, Cerdanyola del Vallès, Spain
A. Mittone
ANL, Lemont, Illinois, USA

FaXToR is one of the beamlines currently in con-struction and commissioning phase at ALBA, dedicat-ed to fast hard X-ray imaging. It will offer absorption and phase contrast imaging to users. Possible applica-tions of the beamline include 3D static and dynamic inspections in a wide range of applications. FaXToR aims to provide both white and monochromatic beam of maximum 36x14 mm (HxV) at sample position with a photon energy up to 70 keV. The optical layout of the beamline will tune the beam depending on the specific experimental conditions. Among the required optical elements, there is a multilayer monochromator, the cooled slits, the filtering elements, the intensity moni-tor and the beam absorption elements. The end station will be equipped with a rotary sample stage and a de-tector system table to accommodate a dual detection thus simultaneously scanning the samples with high spatial and temporal resolutions. On top of it, a motor-ized auxiliary table dedicated to complex sample envi-ronment or future upgrades will translate along the total table length, independently from the two detector system bridges. The design and construction process of the beamline will be presented.

Poster WEPPP029 [0.851 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP029

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Received ※ 26 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 10 December 2023

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WEPPP034

ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions

experiment, interface, vacuum, cryogenics

199

O. Traver Ramos, J.J. Casas, C. Colldelram, J.L. Frieiro, B. Molas, M. Quispe, M. Sanchez
ALBA-CELLS, Cerdanyola del Vallès, Spain

The Thermal Contact Conductance (TCC) between two surfaces plays a very important role in the design of components in particle accelerators. The TCC depends on many variables such as surface finish, type of material, pressure, temperature, etc. As a general rule, the TCC comes from experimental results reported in the specialized literature. However, it is not always possible to find this information, especially if components are designed to operate in cryogenic and vacuum conditions, for this reason, assumptions are made that render results with high uncertainty. In this context, ALBA has designed an experimental set up to carry out axial heat flow steady state experiments for the evaluation of TCC under vacuum and cryogenic conditions. The minimum pressure achievable in the set up will be 1e-5 mbar while the temperature may vary between 80 and 300 K. The results will provide inputs to further optimize ALBA designs, including ALBA II, our ongoing fourth-generation synchrotron upgrade project. This paper describes the experimental setup, the thermal and mechanical design considerations and experimental validation tests.

Poster WEPPP034 [0.616 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP034

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Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 05 April 2024

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WEPPP039

Data Preprocessing Method of High-Frequency Sampling XAFS Spectra Collected in a Novel Combined SAXS/XRD/XAFS Technique

detector, experiment, interface, data-acquisition

207

Y.P. Liu, Z.J. Chen, G. Mo, Z.H. Wu
IHEP, Beijing, People’s Republic of China

High-frequency (HF) sampling X-ray absorption fine structure (XAFS) spectra with a time-resolution of ~8s were collected in our newly developed synchrotron radiation small-angle X-ray scattering (SAXS)/X-ray diffraction (XRD)/XAFS combined technique. Restoring the HF XAFS spectrum which contains hundreds of thousands to millions of data points to a normal XAFS spectrum consisting of hundreds of data points is a critical step for the subsequent neighbor structure analysis. Herein, the data preprocessing method and procedure of HF XAFS spectra were proposed according to the absorption edge of the standard sample and the rotation angular velocity of the monochromator. This work is expected to facilitate the potential applications of HF XAFS spectra in a time-resolved SAXS/XRD/XAFS experiment.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP039

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Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 18 May 2024

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WEPPP040

Experimental Methods Based on Grazing Incidence at the 1W1A Beamline of the Beijing Synchrotron Radiation Facility and Its Application inn Characterizing the Condensed State Structure of Conjugated Po

experiment, operation, synchrotron-radiation, radiation

210

Y. Chen
IHEP, Beijing, People’s Republic of China
P. Cheng, H.X. Li
Sichuan University, Chengdu, People’s Republic of China
Y.C. Han
CIAC, Changchun, People’s Republic of China

The diffuse scattering experimental station of BSRF uses the dual focused monochromatic X-ray provided by 1W1A beam line to carry out structural research on crystal and film materials. This experimental station can carry out high-resolution XRD, XRR, GIXRD, GIWAXS/GISAXS and other experimental methods. GIWAXS/GISAXS is an important method for characterizing the condensed structure of conjugated polymers. We have upgraded and optimized the grazing incidence experimental method of the experimental station, and developed a grazing incidence remote rapid sampling platform. Greatly reduces testing time and enables remote online testing operations for users. Subsequently, we further established in-situ steam treatment, in-situ thermal annealing, in-situ drip coating, in-situ spin coating, in-situ scraping coating, and GISAXS testing platforms, enriching the line station grazing incidence testing methods.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP040

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Received ※ 30 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024

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WEPPP041

The Joy of Vibration Mitigation

ISOL, damping, optics, acceleration

212

J.H. Kelly, S.G. Alcock, S.A. Beamish, D. Crivelli
DLS, Oxfordshire, United Kingdom

The decision was made to build a new Optics Metrology Lab at the Diamond Light Source in a location with 100 times higher floor velocity in the range 50-150Hz than the original location. This paper describes the successful engineering developments to mitigate this. The raft of measures included ‘skyhook¿ damping i.e. active damping using geophone velocity feedback, novel 2 stage passive vibration isolation and fundamental research into acoustic coupling of air conditioning noise. The new systems have been installed, the final performance tested and the optics scientists have been able to continue their sensitive measurements.

Poster WEPPP041 [1.826 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP041

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Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 25 March 2024

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WEPPP050

Quick scanning Channel-Cut crystal monochromator for millisecond time resolution EXAFS at HEPS

controls, simulation, vacuum, synchrotron-radiation

229

Y.S. Lu, H. Liang, Z.K. Liu, D.S. Shen, Z. Sun, Y. Yang, S. Zhang, Y.S. Zhang
IHEP, Beijing, People’s Republic of China

The design and capabilities of a Quick scanning Channel-Cut monochromator (QCCM) for HEPS are presented. The quick scan and step scan are realized by a torque motor directly driven Bragg axis, controlled by a servo controller. This design allows easy and remote control of the oscillation frequency and angular range, providing comprehensive control of QXAFS measure-ments. The cryogenically cooled Si (311) and Si(111) crystals, which extends the energy range from 4.8 keV-45 keV. The dynamic analysis verifies the rationality of the mechanical structure design. The device was fabri-cated and tested, results show an oscillation frequency up to 50Hz with a range of 0.8°, and a resolution of 0.2 arcsecond in step scan mode. This device demonstrates the feasibility of large range quick scan and step scan by a single servo control system.
Quick scanning Channel-Cut crystal monochromator

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP050

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Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024

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WEPPP054

Vibration Analysis of Storage Ring Girder for the Korea 4GSR

storage-ring, operation, alignment, resonance

236

G.W. Hong, T. Ha, H.S. Han, H.-G. Lee
PAL, Pohang, Republic of Korea

Ensuring the mechanical stability of the girder for a 4th generation storage ring (4GSR) is crucial to provide a high-quality photon beam to users because the mechanical motion should be maintained at less than 10% of the electron beam size which is expected to be sub-micrometer. One of the key roles of the girder is to provide structural rigidity and temperature stability while effectively suppressing vibrations from the ground during accelerator operation. The Korea 4GSR girder is being designed to have the first natural frequency above 50 Hz to minimize the effect of the ground vibration. In order to maintain better mechanical stability, it is necessary to conduct research not only on the natural vibration evaluation of the girder but also on external vibrations to the girder structure. In this paper, we introduce the result of the harmonic analysis of the girder structure using the finite element method.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP054

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Received ※ 25 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 July 2024

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WEPPP058

Permanent Magnets in SOLEIL II

dipole, quadrupole, lattice, permanent-magnet

240

A. Berlioux, Y. Benyakhlef, C.A. Kitégi, F. Marteau, A. Mary, R.E. Raimon, M. Ribbens, K. Tavakoli
SOLEIL, Gif-sur-Yvette, France

Twenty years after SOLEIL Synchrotron was established, the facility needs to adapt to follow new scientific fields that have emerged since. The proposed new lattice for upgrading SOLEIL storage ring will reduce the horizontal emittance by a factor 50 to reach less than 100 pm.rad. This new lattice presents significant challenges and requires compact magnets that provide strong gradients. As a result, permanent magnet (PM) technology is preferred over electromagnet (EM) technology whenever possible. All sextupoles and octupoles will be EM to ensure efficient optic correction. However, all dipoles, reverse bends and quadrupoles will be PM. The replacement of aging infrastructure and the use of PM will lead to a noticeable reduction in SOLEIL’s electric power consumption and environmental footprint. SOLEIL II lattice consists of 116 dipoles with gradient and 354 PM quadrupoles which can also be used as reverse bends. All PM multipoles have been designed by SOLEIL¿s Mechanical Engineering Group in close collaboration with the Magnetic and Insertion Devices Group. This contribution will present the design, assembly procedure, and prototyping of SOLEIL II PM multipoles.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP058

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Received ※ 23 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 July 2024

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THOAM02

SmarGon MCS2: An Enhanced Multi-Axis Goniometer with a New Control System

controls, operation, software, interface

247

W. Glettig, D. Buntschu, E.H. Panepucci, M. Wang
PSI, Villigen PSI, Switzerland
A. Omelcenko
SmarAct, Oldenburg, Germany

As an improvement on the commercially available SmarGon multi-axis goniometer (SmarAct GmbH), the MX Group at the Paul Scherrer Institute (PSI) has been pursuing further development of the system. In addition to suggesting mechanical improvements to SmarAct to improve ruggedness and reliability, PSI has developed a brand-new and flexible control system for better customization, reliability and control. Calibration routines were implemented to reduce systemic errors, and the system has been tailored for practical beamline usage. SmarGon is a six degree-of-freedom positioning device, allowing positioning of a sample and orientation around any given point, with <5um sphere of confusion diameter. It was purpose-built for protein-crystallography experiments but, as will be presented here, was also re-purposed for other applications. Two devices have been in continuous 24/7 use for two years at the MX Beamlines PXI & PXII at SLS.

Slides THOAM02 [77.940 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM02

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Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 08 January 2024

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THOAM04

Overall Progress on Development of X-ray Optics Mechanical Systems at High Energy Photon Source (HEPS)

optics, vacuum, synchrotron-radiation, radiation

252

S. Tang, Y.H. Dong, X.H. Kuang, M. Li, H. Liang, R.Y. Liao, L.H. Ma, Z.N. Ou, H. Qian, Z.R. Ren, W.F. Sheng, J. Wang, R.Z. Xu, H.H. Yu
IHEP, Beijing, People’s Republic of China

Funding: This work is supported by the project of High Energy Photon Source (HEPS).
High Energy Photon Source (HEPS) regarded as a new 4th generation synchrotron radiation facility, is under construction in a virgin green field in Beijing, China. The X-ray optics/mirror mechanical systems (MMS) play an important role, which would be expected to be designed carefully and rigidly for the extremely stable performance requirement of HEPS. In addition, there are indeed big challenges due to so many types of mirror systems, such as white beam mirror (WBM), harmonic suppression mirror (HSM), combined deflecting mirror (CDM), bending mirror, Nano-KB, and the transfocator of Compound refractive lens (CRLs), etc. Therefore, overall progress on design and maunfacturing of the MMS is introduced, in which a promoting strategy and generic mirror mechanical system as a key technology is presented and developed for the project of HEPS. Furthermore, ultra-stable structucture, multi-DOF precision positioning, Eutectic Galium Indium (E-GaIn)-based vibration-decoupling watercooling, clamping, and bending have always been prior designs and considerations.
Shanzhi Tang, Weifan Sheng, Jianye Wang, et al, Overall progress on the design of mirror mechanical systems at High Energy Photon Source (HEPS), SRI2021, Hamburg Germany, 2022. POSTER

Slides THOAM04 [2.328 MB]

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reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM04

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Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024

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THOAM05

Modeling the Disturbances and the Dynamics of the New Micro CT Station for the MOGNO Beamline at Sirius/LNLS

experiment, GUI, detector, software

256

G.S. Baldon, F. Ferracioli, R.R. Geraldes, G.B.Z.L. Moreno, G.S. de Albuquerque
LNLS, Campinas, Brazil

Funding: Ministry of Science, Technology and Innovation (MCTI)
At the 4th generation synchrotron laboratory Sirius at the Brazilian Synchrotron Light Laboratory (LNLS), MOGNO is a high energy imaging beamline*, whose Nano Computed Tomography (CT) station is already in operation. The beamline’s 120x120 nm focus size, 3.1x3.1 mrad beam divergence, and 9·10¹¹ ph/s flux at 22-67 keV energy, allows experiments with better temporal and spatial resolution than lower energy and lower stability light sources. To further utilize its potential, a new Micro CT station is under development to perform experiments with 0.5-55 um resolution, and up to 4 Hz sample rotation. To achieve this, a model of the disturbances affecting the station was developed, which comprised: i) the characterization and simulation of disturbances, such as rotation forces; and ii) the modeling of the dynamics of the Micro-station. The dynamic model was built with the in-house developed Dynamic Error Budgeting Tool**, which uses dynamic substructuring to model 6 degrees of freedom rigid body systems. This work discusses the tradeoffs between rotation-related parameters affecting the sample to optics stability and the experiment resolution in the frequency domain integrated up to 2kHz.
* N. L. Archilha, et al. 2022, J. Phys.: Conf. Ser. 2380 012123.
** R. R. Geraldes et al. 2022, Precision Engineering Vol. 77, 90-103.

Slides THOAM05 [11.814 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM05

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Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 March 2024

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THPPP003

FEM Simulations for a High Heat Load Mirror

polarization, optics, simulation, undulator

274

J. Seltmann, H. Geraissate, M. Hoesch
DESY, Hamburg, Germany

At the variable polarization XUV beamline P04 of PETRA III the first mirror is used to switch the beam between the two branches of the beamline. The heat load on this white beam mirror is dependent on the degree of polarization and the energy of the first harmonic of the synchrotron radiation. For this project the water cooled "notched" mirror approach by Khounsary* and Zhang et al.** has been evaluated with FEM simulations. These show promising results for linear horizontal (LH) polarization in which the heat load profile is aligned with the mirror length. For linear vertical (LV) polarization the heat load is concentrated in the mirror centre, which violates the basic concept of the "notched" mirror design and therefore the simulation results indicate only poor performance. To compensate for this a secondary cooling loop has been implemented and will be shown to improve the performance for the LV case significantly. Additionally, a new design approach is evaluated to reduce the peak temperatures of the mirror, which otherwise ranged at 140-180°C.
* Khounsary, A.M., Proc. SPIE 3773, X-Ray Opt. Des., (1999). 10.1117/12.370114
** Zhang, L. et al., J. Phys.: Conf. Ser. 425, 052029 (2013). 10.1088/1742-6596/425/5/052029.

Poster THPPP003 [1.369 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP003

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Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 28 May 2024

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THPPP007

Optimizing Indirect Cooling of a High Accuracy Surface Plane Mirror in Plane-Grating Monochromator

optics, SRF, brightness, ECR

280

J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility.
For the cooling of the plane mirror in VIA-PGMs (var-iable-included-angle plane-grating monochromators), the top-side indirect cooling based on water is preferred for its advantages, such as cheaper, easier to use, smart notches, etc, when compared to the internal cooling. But it also arises challenges to control the RMS residual slope error of the mirror, whose requirement is less than 100 nano-radian. This requirement is even hard to fulfill, when combined with 1) the asymmetry thermal defor-mation on the meridian of the footprint area during the energy scanning, 2) the high heat load deduced by the synchrotron light and 3) the no obvious effects of the classical optimizations, such as increasing footprint size, cooling efficiency or adding smart notches. An effective way was found after numerous attempts, which is to make the footprint area far from the mirror¿s edge to reduce the asymmetry of the thermal deformation except for leading to a longer mirror. This paper will illustrate how the asymmetry affects the mirror¿s residual slope error and then, focus on the relationship among the asymmetry of cooling and the distance to provide a ref-erence for optical cooling.

Poster THPPP007 [1.805 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP007

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Received ※ 26 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 March 2024

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THPPP008

Optimization of Thermal Deformation of a Horizontally Deflecting High-Heat-Load Mirror Based on eInGa Bath Cooling

radiation, factory, optics, undulator

283

J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility.
The synchrotron facility are developing towards higher brightness, lower divergence, narrower pulse, higher stability, etc. Therefore, the requirements of the first mirror of the beamline, who bear high-heat-load, were upgraded, and the performances of the mirror will be affected easily by other factors, such as flow induced vibration, clamping force, etc. Indirect water cooling based on eInGa bath is regarded as an effective mean to solve these thorny problems in designing of the first mirror cooling. However, for the case a horizontal de-flection mirror, the unilateral cooling method is usually adopted, resulting in some changes in the structure of the mirror. In this paper, a first mirror horizontally deflect-ing in Hefei advanced light source (HALF) are taken as examples to introduce the optimization method to achieve ultra-low meridian slope error of the first hori-zontal deflection mirror. The results show that this opti-mization method provides a rapid design mean to design the cooling scheme of the horizontally deflecting mirror based on the eInGa bath.

Poster THPPP008 [2.901 MB]

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reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP008

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Received ※ 01 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 February 2024

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THPPP009

The Heat Load Calculation in the Grating-Based Beamline at Hefei Advanced Light Facility (HALF)

undulator, synchrotron-radiation, optics, radiation

287

Z. Wang, J. Chen, X.W. Du, D. Feng, Q.P. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei diffraction limited light source.
For the 4th generation synchrotron radiation (SR) light source, the heat load causes severe thermal deformation on the beamline optics as the emittance is reaching at the physical limit. The precise calculation of heat load on the optical elements is important for the thermal analysis including cooling method and thermal deformation simulation. A heat load calculation code has been developed for grating based SR beamline optics, which consists of modules of SR source simulation, mirror reflectivity and grating efficiency. The calculation results has been checked with SRCalc results. This code has been used to calculate the heat load of the Test Beamline optics at Hefei Advanced Light Facility (HALF). The heat absorbed by the first three optical elements¿including a toroidal mirror, a plane mirror and a plane grating¿is calculated.
[1]R. Reininger. SRCalc (2001). Unpublished
[2]L. Rebuffi, et.el., J. Synchrotron Radiat. 27: 1108-1120 (2020).
[3]Z. Sun, et.al., The Innovation, 4 (6), 100514 (2023).

Poster THPPP009 [1.853 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP009

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Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 09 January 2024

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THPPP012

Shape Optimization Design of Monochromator Pre-mirror in FEL-1 at S{³}FEL

FEL, laser, free-electron-laser, electron

293

Z.M. Xu, C. Yang, W.Q. Zhang, Y.P. Zhong
IASF, Shenzhen, Guangdong, People’s Republic of China

For the monochromator pre-mirror in FEL-1 at S3FEL, the deformation induced by high heat load result in severe effects on the beam quality during its off-axis rotation. To meet the pre-mirror shape error requirement for X-ray coherent transport, an integra-tion of passive cooling and active heating systems for thermal management of the monochromator pre-mirror has been proposed, developed, and modelled. An ac-tive heating system with multiple electric heaters is adopted to compensate for the pre-mirror shape fur-ther. Finally, using MHCKF model, the optimization of multiple heat fluxes generated by all electric heaters was accomplished. The results show that the thermal management using passive cooling and active heat schemes is effective to obtain high-precision surface shape for the pre-mirror.

Poster THPPP012 [0.772 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP012

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Received ※ 24 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 November 2023

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THPPP013

Studies on the Influences of Longitudinal Gradient Bending Magnet Fabrication Tolerances on the Field Quality for SILF Storage Ring

HOM, storage-ring, radiation, extraction

296

J. Zhu, D.H. Liang, Y. Shi, C.G. Wang, M. Zhang
IASF, Shenzhen, Guangdong, People’s Republic of China

The advanced storage ring of 4th generation synchrotron radiation facility, known as the diffraction-limited storage ring (DLSR), is based on multi-bend achromat (MBA) lattices, which enable an emittance reduction of one to two orders of magnitude pushing beyond the radiation brightness and coherence reached by the 3rd generation storage ring. The longitudinal gradient bending (LGB) magnets, with multiple magnetic field stages in beam line direction, are required in the DLSR to reduce the emittance. The permanent magnet based LGB magnets are selected for the Shenzhen Innovation Light-source Facility (SILF) due to the advantages of operation economy, compactness and stability compare to the electro-magnet. In this paper, the influences of typical LGB magnet fabrication tolerances on the field qualities are presented using a dedicated parameterized finite element (FE) model, such as the poles height and width tolerances, the pole tips parallelism (in different orientations) and etc. Meanwhile the influences of permanent magnets discreteness and the magnetic forces (between top and bottom pole tips) induced yoke deformation on the field qualities are studied and presented.

Poster THPPP013 [0.599 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP013

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Received ※ 27 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 08 May 2024

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THPPP014

A Special-Shaped Copper Block Cooling Method for White Beam Mirrors Under Ultra-High Heat Loads*

radiation, synchrotron-radiation, controls, simulation

299

J.Y. Liu, H. Qin, X.X. Yan
IASF, Shenzhen, Guangdong, People’s Republic of China

In order to fulfil the more stringent requirements of op-tical figure accuracy for cooled X-Ray mirrors imposed to high heat loads, especially from advanced insertion de-vices in the diffraction limited storage rings (DLSR), investigations on the cooling system for white beam mirrors are conducted in this paper. A special-shaped copper block (SSCB) cooling method is proposed, using eutectic indium-gallium alloy as heat transfer medium. The SSCB cooling technology can keep a 550mm-length mirror slope error of 0.2 ¿rad (RMS) under 230 W absorp-tion heat power, showing great advantages in the accura-cy and flexibility for thermal deformation minimization when compared with the traditional ones.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP014

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Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 10 December 2023

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THPPP016

Numerical and Experimental Studies to Evaluate the Conservative Factor of the Convective Heat Transfer Coefficient Applied to the Design of Components in Particle Accelerators

experiment, simulation, HOM, storage-ring

306

M. Quispe, J.J. Casas, C. Colldelram, M. Sanchez
ALBA-CELLS, Cerdanyola del Vallès, Spain
H. Bello
La Romanica, Barberà del Vallès, Sabadell, Spain
R. Capdevila, M. Rabasa, G.A. Raush
ESEIAAT, Terrassa, Spain
S. Grozavu
Universidad Politecnica de Madrid, ETSI Aeronauticos, Madrid, Spain

The fluid boundary condition applied to the design of components in Particle Accelerators is calculated as a global variable through experimental correlations coming from the literature. This variable, defined as the Convective Heat Transfer Coefficient, is obtained using the correlations of Dittus and Boelter (1930), Sieder and Tate (1936), Petukhov (1970), Gnielinski (1976), among others. Although the designs based on these correlations work properly, the hypothesis of the present study proposes that the effectiveness of these approximations is due to the existence of a significant and unknown conservative factor between the real phenomenon and the global variable. To quantify this conservative factor, this work presents research based on Computational Fluid Dynamics (CFD) and experimental studies. In particular, recent investigations carried out at ALBA confirm in a preliminary way our hypotheses for circular pipes under fully and non-fully developed flow conditions. The conclusions of this work indicate that we could dissipate the required heat with a flowrate lower than that obtained by applying the experimental correlations.

Poster THPPP016 [1.419 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP016

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Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 March 2024

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THPPP023

Design and Test of a New Crystal Assembly for a Double Crystal Monochromator

monitoring, vacuum, photon, HOM

313

Y. Yang, H. Liang, Z.K. Liu, Y.S. Lu, D.S. Shen, L. Zhang, S. Zhang, Y.S. Zhang
IHEP, Beijing, People’s Republic of China

Vertical diffraction monochromator is a typical optical device in synchrotron radiation device. Its main requirements and characteristics are high Angle accuracy and stability. Due to the high requirements of new light sources, high precision and high stability have become a common difficulty. This paper mainly introduces the design and test of an internal crystal module of HDCM. There are two main parts: the first crystal and the second crystal. The first crystal assembly includes crystal cooling and clamping, using microchannel edge cooling and flat plate clamping schemes. The second crystal component, through the motor to the top, drives the flexible hinge, and then realizes the rotation of the crystal. At the same time, the Angle monitoring system is designed. The design scheme is verified by processing. The shape of the clamping surface of a crystal component meets the requirements of use. The motion test of the two crystal components is carried out in the atmosphere, vacuum and low temperature vacuum environment, and the results are much higher than the required parameters. And the whole stability is tested. It has high stability.

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reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP023

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Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 19 December 2023

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THPPP038

Girders for SOLEIL-II Storage Ring

dipole, storage-ring, lattice, alignment

332

J. Da Silva Castro, S. Ducourtieux, Z. Fan, F. Lepage, A. Nadji, K. Tavakoli
SOLEIL, Gif-sur-Yvette, France

After two decades since its establishment, the SOLEIL Synchrotron facility needs to adapt to follow new scientific fields that have emerged since. After the Conceptual Design Report (CDR) phase for the facility Upgrade, the SOLEIL teams have been working for several months on the Technical Design Report (TDR). The ¿SOLEIL Upgrade¿ project is called ¿SOLEIL II¿ and is divided into several sub-projects. Among these sub-projects, one concerns storage ring Girders that will support all magnets of the new Lattice. These 86 Girders, each one supported by 2 plinths, must ensure an excellent degree of vibration stability. Before obtaining a final design for these Girders, a significant amount of study work has already been carried out (design, finite elements simulations, sub-assembly prototyping, dynamic measurements, tests, etc.). To validate the concepts, a fully equipped prototype girder was launched into manufacturing. In this contribution the preliminary studies and the ongoing investigations on SOLEIL II girder design will be presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP038

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Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 14 March 2024

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THPPP047

NEG Film Development and Massive Coating production for HEPS

vacuum, cathode, storage-ring, ECR

343

Y.S. Ma, H. Dong, D.Z. Guo, P. He, F. Sun, Y.C. Yang
IHEP, Beijing, People’s Republic of China
T. Huang
IHEP CSNS, Guangdong Province, People’s Republic of China

Massive production facilities of NEG coated vacuum chambers have been developed for HEPS in Huairou, Beijing, which based on the NEG coating prototypes of HEPS-TF. The facilities can achieve simultaneous coating of 16~20 vacuum chambers of HEPS including irregular shaped vacuum chambers. The pumping per-formance of the NEG coated vacuum chambers has been measured by test facilities. After heating at 200°C for 24 hours, the highest pumping speed of H₂ is about 0.65 l/scm², and the highest capacity of CO is about 1.89×10^-5 mbar·L/cm². The lifetime is more than 20 cycles of air exposure and re-activation. The pumping performance meets the design requirements of HEPS. Currently the NEG coated vacuum chambers are applied to the storage ring of HEPS.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP047

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Received ※ 02 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 22 November 2023 — Issued ※ 18 July 2024

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THPPP052

Design and Development of Coated Chamber for In-Air Insertion Devices

vacuum, undulator, insertion-device, synchrotron-radiation

352

P.C. Wang, Y. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China
H. Dong, Y.S. Ma, Y.G. Wang, L. Zhang
IHEP, Beijing, People’s Republic of China
J.M. Liu, S.M. Liu, X.Y. Sun
DNSC, Dongguan, People’s Republic of China
B. Tan
Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China
B.L. Zhu
IHEP CSNS, Guangdong Province, People’s Republic of China

The insertion devices ¿ID¿is an important guarantee for further improving the performance of the light source to meet the needs of different users. For in-air ID (undulator, wiggler, etc.), the magnetic structure is in the air, and the vacuum chamber is in the middle of the magnetic structure to ensure the normal operation of the beam. In order to increase the magnetic field strength, the magnetic gap is generally relatively small. Factors such as small setting space, high precision, and low conductance all pose challenges to the design and processing of vacuum chamber. This paper introduces the development process of the vacuum chamber prototype of the coating type ID for the China ’s first diffraction-limited light source HEPS. The simultaneous analysis and vacuum pressure distribution calculation of the ID are carried out, and the NEG coating scheme is proposed as an more economical means to obtain ultra-high vacuum. The prototype NEG coating progress is introduced.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP052

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Received ※ 02 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 12 November 2023 — Issued ※ 18 July 2024

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FROAM02

Vacuum System of SPS-II: Challenges of Conventional Technology in Thailand New Generation Synchrotron Light Source

vacuum, simulation, photon, storage-ring

363

T. Phimsen, S. Boonsuya, S. Chaichuay, S. Chitthaisong, N. Juntong, P. Klysubun, S. Prawanta, T. Pulampong, K. Sittisard, S. Srichan, P. Sudmuang, P. Sunwong
SLRI, Nakhon-Ratchasima, Thailand

Siam Photon Source II (SPS-II) is the first Thailand¿s 4th generation synchrotron light source. It not only provides high-energy and high-brightness synchrotron radiation for both academic and industrial research after its completion, but it is also strategically aimed to build up a stronger Thai industrial community during the design and construction period. Vacuum system is one of the systems expected to play a key role in leveling up the local manufacturing capability of the country. Most of the main components in the system are planned to domestically fabricate through technology transfer. Instead of NEG coating technology, this vacuum system design of SPS-II storage ring is based on the conventional technology which involves Thai industry potential and expertise. This paper reviews the challenges and adaptation of conservative design in dense DTBA magnet lattice with magnet aperture limitation. The vacuum chambers and bending magnets have been modified to accommodate IR beamlines which are included in the second phase plan. Pressure profile of the vacuum system in storage ring is evaluated. Then, the progress of overall vacuum system of SPS-II is described.

Slides FROAM02 [14.635 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-FROAM02

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Received ※ 02 November 2023 — Revised ※ 08 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 March 2024

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