Keyword: vacuum
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TUOAM02 Update of the BM18 ESRF Beamline Development: Presentation of Selected Equipment and Their Commissioning detector, SRF, experiment, MMI 1
 
  • F. Cianciosi, A.-L. Buisson, P. Carceller, P. Tafforeau, P. Van Vaerenbergh
    ESRF, Grenoble, France
  
  This article highlights specific equipment that have not yet been described in previous publications, notably the in-vacuum cooled fast shutter for high-energy, the wide aluminium window and tailored high-precision slits (400x200 mm opening). 2022 and 2023 have seen the installation and commissioning of these new equipment. The ID18 beamline opened for user applications in September 2022 with limited capabilities and has been increasing its possibilities since then. It is expected to be fully equipped by the end of 2024.  
slides icon Slides TUOAM02 [187.155 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM02  
About • Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 July 2024
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TUOAM05 Thermal-Deformation-Based X-Ray Active Optics Development in IHEP optics, synchrotron, 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 icon 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 synchrotron, cryogenics, controls, 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 icon 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 optics, detector, MMI, synchrotron 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 icon 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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TUPYP004 A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates cryogenics, radiation, interface, alignment 37
 
  • B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerque
    LNLS, Campinas, Brazil
  • V.C. Kuriyama
    CNPEM, Campinas, SP, Brazil
  • A. Lopes Ribeiro
    Federal University of Uberlandia, Uberlândia, M.G., Brazil
  • J.H. dos Santos
    IF-UFRGS, Porto Alegre, Brazil
  
  The design of optical elements compass different development areas, such as optics, structures and dynamics, thermal, and control. In particular, the thermal designs of mirrors aim to minimize deformations, whose usual requirements are around 5 nm RMS and slope errors in the order of 150 nrad RMS. One of the main sources of uncertainties in thermal designs is the inconsistency in values of thermal contact resistances (TCR) found in the literature. A device based on the ASTM D5470 standard was proposed and designed to measure the TCR among materials commonly used in mirror systems. Precision engineering design tools were used to deal with the challenges related to the operation at cryogenic temperatures (145 K) and under several pressures rates (1~10 MPa) whilst ensuring the alignment between the specimens. We observed using indium as Thermal Interface Material reduced the TCR in 10~42,2% for SS316/Cu contacts, and 31~81% for Al/Cu. Upon analyzing the measurements, we identified some areas for improvements in the equipment, such as mitigating radiation and improving the heat flow in the cold part of the system that were implemented for the upgraded version.  
poster icon Poster TUPYP004 [2.549 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004  
About • Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024
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TUPYP008 Exactly Constrained, High Heat Load Design for SABIA’s First Mirror MMI, alignment, monitoring, synchrotron 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 icon 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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TUPYP018 Design and Improvements of a Cryo-Cooled Horizontal Diffracting Double Crystal Monochromator for HEPS cavity, photon, cryogenics, ISOL 55
 
  • Y.S. Zhang, H. Liang, Y.S. Lu, D.S. Shen, L. Zhang
    IHEP, Beijing, People’s Republic of China
  
  Horizontal diffracting double crystal monochromator(HDCM) are usually used in a 4th generation light source beamline due to the larger source size in the horizontal direction. This paper introduces the mechanical design and optimization of a HDCM for Low-dimension Structure Probe Beamline of HEPS. In order to achieve the high stability requirement of 50nrad RMS, the structural design is optimized and modal improved through FEA. In order to meet the requirement of a total crystal slope error below 0.3¿rad, FEA optimizations of the clamping for first and second crystal are carried out. The vacuum chamber is optimized to become more compact, improving the maintainability. Fabrication of the HDCM is under way. The results show that the design is capable of guarantee the required surface slope error, stability, and adjustment requirements.  
poster icon Poster TUPYP018 [1.172 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP018  
About • Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 May 2024
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TUPYP023 Design of a Long Versatile Detector Tube System for Pink Beam Small-Angle X-Ray Scattering (SAXS) Beamline at HEPS detector, experiment, scattering, radiation 64
 
  • Z.Q. Cui, G. Mo, Z.N. Ou, S. Tang, X. Xing, J.C. Zhang
    IHEP, Bejing, People’s Republic of China
  
  The long versatile detector tube system for small-angle X-ray scattering meets the experimental conditions of -5-50° wide-angle X-ray scattering (WAXS), 0.04-6° small-angle X-ray scattering (SAXS) and 0.001-0.1° ultra-small-angle X-ray scattering (USAXS), record the same change process of the same sample, and obtain comprehensive structural information of atomic size, nanometer size and micron size, which can be applied to nanomaterials, mesoporous materials, biological macromolecules, polymers and other fields. The size of the tube system is 26760×1945×2565 mm,and consists of four parts: WAXS device, SAXS device, USAXS device and vacuum chamber. The vacuum chamber is assembled by connecting and assembling parts such as thick and fine pipes, bellows, heads and vacuum valves, with a length of 13775 mm and an inner diameter of 1500mm. The thin pipe is 7740 mm long and has an inner diameter of 300 mm. The design scheme of the tube system is committed to ensuring that the distance between the SAXS detector and the sample is continuously adjustable within the range of 1-13.5 m in vacuum environment, and the straightness of the 13840 mm long track of the SAXS device is better than 1 mm.  
poster icon Poster TUPYP023 [1.737 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP023  
About • Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 January 2024
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TUPYP027 A Subnanometer Linear Displacement Actuator site, laser, synchrotron, 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 icon 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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TUPYP030 The Design of High Stability Double Crystal Monochromator for HALF synchrotron, 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 icon 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, synchrotron, 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 icon 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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TUPYP038 A Design of an X-Ray Pink Beam Integrated Shutter for HEPS cavity, simulation, controls, photon 85
 
  • S. Liu, Q. Han, G. Mo, A.Y. Zhou
    IHEP, People’s Republic of China
  
  The main function of the shutter is to accurately control the exposure time of the sample so that the sample as well as the detector can be protected. In order to cover the high thermal load and high energy working environment, we designed an integrated shutter device. The device includes a thermal absorber shutter, a piezoelectric ceramic fast shutter, a vacuum chamber and an adjustable height base. Firstly SPECTRA and ANSYS were used to verify the device’s institutional temperature reliability at a thermal power density of 64W/mm2. In addition, the device is suitable for both monochromatic and pink light operation with a horizontal pitch of 15mm. The device is also compatible with both vacuum and atmospheric working environments, and the recollimation of the device is not necessary when switching modes. Finally, the thermal absorber shutter is also able to function as a beam profile monitor, and the position of the spot can be monitored through a viewing window on the cavity.  
poster icon Poster TUPYP038 [0.781 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP038  
About • Received ※ 08 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 December 2023
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TUPYP039 A Design of an X-ray Monochromatic Adjustable Slit for HEPS Beamlines GUI, controls, collimation, synchrotron 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 icon 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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TUPYP048 A High Repetition Rate Free-electron Laser Shutter System FEL, laser, diagnostics, electron 101
 
  • J.C. Gu, H. Jiang, Y. Tong, Z. Wang
    ShanghaiTech University, Shanghai, People’s Republic of China
  
  The Shanghai High repetition rate XFEL and Extreme light facility (SHINE) is the first high repetition rate XFEL in China. It is a powerful tool for scientific research. However, the high repetition rate XFEL has a high peak power and average power. The high peak power can damage optics and devices in the optical path in femtosecond. And the high average power will cause the distortion of optics. Consequently, it becomes crucial to protect optics and devices in the optical path. This shutter system is designed to protect the diagnostics and avoid thermal distortion and thermal damage. It can control the number of pulses and average power on the diagnostics. The time window of shutter can be as small as 10 ms. It has can absorb most of FEL power.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP048  
About • Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 January 2024
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TUPYP050 Design and Calculation of Vacuum System for WALS Storage Ring photon, storage-ring, radiation, synchrotron 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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TUPYP051 Progress of WALS NEG Coating Equipment and Technology controls, target, experiment, site 108
 
  • G. Wei, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, C.Y. Liu, Y. Nie, J. Wang, Y. Wang, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou
    IAS, Wuhan City, People’s Republic of China
  
  The goal of WALS (Wuhan Advanced Light Source) is to build a world -class radiating light source. Chromium-zirconium-copper was chosen as the main material for the entire storage ring vacuum vessels. And magnetron sputtering (PVD) process was used to deposit NEG coating on the inner surface of copper vacuum chamber, which can further improve the performance of the vacuum. At present, the coating laboratory has taken shape as a whole, and has built a standard cleaning platform, coating platform, ultimate vacuum test platform, extraction rate test platform, coating microstructure test process. As for the coating equipment, bias power supply and custom ceramic parts are added to achieve more functions. Different target materials were controlled by multi-electrode control, while experiments were performed on deposited compositions of different ratios of multilayers; Sample tube bias control access during the coating process; Multiple combinations of target materials and bias parameters for the technique have been studied. Coating is currently underway, and specific test results are in progress.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP051  
About • Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024
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TUPYP054 Mechanical Design of the Beam Gas Ionisation (BGI) Beam Profile Monitor for CERN Super Proton Synchrotron electron, detector, impedance, proton 114
 
  • M.T. Ramos Garcia, W. Andreazza, P. Bestmann, H. Bursali, N.S. Chritin, W. Devauchelle, A. Harrison, G. Khatri, M. McLean, C. Pasquino, F. Sanda, P. Schwarz, J.W. Storey, R. Veness, W. Vollenberg, C. Vollinger
    CERN, Meyrin, Switzerland
  
  The Beam Gas Ionisation (BGI) instrument of the Proton Synchrotron (PS), presently installed and operational, has been re-designed for the Super Proton Synchrotron (SPS), the following machine along the Large Hadron Collider (LHC) injector chain at CERN accelerator complex. Using the same detection technology, Timepix3, the SPS-BGI infers the beam profile from the electrons created by the ionisation of rest gas molecules and accelerated onto an imaging detector. This measurement method will allow for continuous, non-destructive beam size measurement in the SPS. In view of the upgrade, the design has been simplified and validated for integration, radio-frequency & impedance, high-voltage and ultra-high vacuum compatibility.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP054  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 14 November 2023
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WEOAM02 A Vacuum Aspirated Cryo Cooling System (VACCS) controls, cryogenics, synchrotron, 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 icon 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, synchrotron, 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 icon 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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WEPPP002 The Status of the High-Dynamic DCM-Lite for Sirius/LNLS controls, MMI, alignment, synchrotron 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 icon 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPPP010 The MID Instrument of European XFEL: Upgrades and Experimental Setups detector, laser, experiment, FEL 164
 
  • G. Ansaldi, T. Andersen, A. Bartmann, U. Boesenberg, J. Hallmann, A. Madsen, J. Möller, J.-E. Pudell, A. Rodriguez-Fernandez, A. Schmidt, R.A. Shayduk, K. Sukharnikov, J. Wonhyuk, A. Zozulya
    EuXFEL, Schenefeld, Germany
  
  It is given an insight on examples of Upgrades currently under development at the Material Imaging and Dynamics (MID) Instrument of the European XFEL GmbH [1], [2] in the X-ray Scattering System (XSIS) [3]: - The Multi-Environment Setups for a Multi-Detector System (MDS2) are the Setups designed around an additional detector chamber (MDS) to be used at the same time of the AGIPD detector [4], allowing it to cover simultaneously WAXS, SAXS and large field of view regions by using two area detectors, one close to the sample and a second one further away. - The Multi-Purpose Chamber 2 (MPC-2) represents the evolution of the current version and includes the upgraded design of both the exterior vessel and of some local optics assemblies in interior. Both these Upgrades will allow to improve the current MID Beamline performance capabilities and make entirely new experiments possible. - Reported are also Examples of some relevant Experimental Setups successfully designed and implemented going as well in the simultaneous multi-detector-use direction.  
poster icon Poster WEPPP010 [5.728 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP010  
About • Received ※ 10 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024
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WEPPP012 Multiple Detector Stage at the MID Instrument of European XFEL detector, electron, FEL, experiment 168
 
  • A. Schmidt, G. Ansaldi, A. Bartmann, U. Boesenberg, J. Hallmann, A. Madsen, J. Möller, K. Sukharnikov
    EuXFEL, Schenefeld, Germany
  
  The Multiple Detector Stage (MDS) is an ancillary detector setup for the Materials Imaging and Dynamics (MID) instrument at the European X-Ray Free-Electron Laser Facility (EuXFEL). It is developed to improve the current capabilities concerning X-ray detection and make entirely new experiments possible. A unique feature of the MID instrument is the large flexibility in positioning of the AGIPD detector relative to the sample. This enables a large variety of instrument configurations ranging from small-angle (SAXS) to wide-angle (WAXS) X-ray scattering setups. A recurrent request from the users, which is currently not enabled, is the option of simultaneously recording both wide- and the small angle scattering by using two area detectors. The aim of developing MDS is to provide this missing capability at MID so that SAXS and WAXS experiments can be performed in parallel. The MDS will not be installed permanently at the instrument but only on request to provide as much flexibility as possible. In this article, the background and status of the MDS project is described in detail.  
poster icon Poster WEPPP012 [1.731 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP012  
About • Received ※ 10 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 23 March 2024
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WEPPP013 Mechanical Design and Integration of the SXP Scientific Instrument at the European XFEL FEL, experiment, laser, electron 172
 
  • V.V. Vardanyan, D.G. Doblas-Jimenez, M. Dommach, P.G. Grychtol, M. Izquierdo, N. Kohlstrunk, D. La Civita, S. Molodtsov, O.J. Ohnesorge, T.E. Tikhodeeva, M. Vannoni
    EuXFEL, Schenefeld, Germany
  • J. Buck, R.K. Rossnagel
    DESY, Hamburg, Germany
  • S.G. Schönhense
    Johannes Gutenberg University Mainz, Institut für Physik, Mainz, Germany
  • T.S. Thiess
    IEAP, Kiel, Germany
  
  The European XFEL provides femtosecond X-ray pulses with a MHz repetition rate in an extended photon energy range from 0.3 to 30 keV. Soft X-rays between 0.3 and 3 keV are produced in the SASE3 undulator system, enabling both spectroscopy and coherent diffraction imaging of atoms, molecules, clusters, ions and solids. The high repetition rate opens the possibility to perform femtosecond time-resolved photoelectron spectroscopy (TR-XPES) on solids. This technique allows the simultaneous understanding of the evolution of the electronic, chemical and atomic structure of solids upon an ultrafast excitation. The realization with soft X-rays requires the use of MHz FELs. In this contribution, we present the mechanical design and experimental realization of the SXP instrument. The main technical developments of the instrument components and the TR-XPES experimental setup are described.  
poster icon Poster WEPPP013 [1.253 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP013  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 12 March 2024
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WEPPP024 Design of a Hard X-Ray Nanoprobe based on FZP controls, optics, detector, SRF 184
 
  • K.L. Liao, P.Y. Li, M.H. Song
    Jinan Hanjiang Opto-Electronics Technology Company Ltd., Jinan, People’s Republic of China
  • Q.L. He, P.P. Zhu
    IHEP, Beijing, People’s Republic of China
  • W.Q. Hua, P. Zhou
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  • L. Luo
    TUB, Beijing, People’s Republic of China
  
  A high-resolution hard X-ray nanoprobe (HXNP) based on Fresnel Zone plate (FZP) was designed. The HXNP relies on a compact, high stiffness, low heat dissipation and low vibration design philosophy and utilizes FZP as nanofocusing optics. The optical layout and overall mechanical design of the HXNP were introduced. Several important modules, such as probe module, sample module, interferometer module and vacuum chambers were discussed in detail.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP024  
About • Received ※ 02 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 12 April 2024
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WEPPP025 Application of CuCrZr in the Front-end of Shanghai Synchrotron Radiation Facility synchrotron, 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 icon 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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WEPPP032 Photon Slits Prototype for High Beam Power Using Rotational Motions photon, operation, undulator, optics 196
 
  • X. Liu, W. Cheng, L. Hudson, H. Patel, A.C. Walters
    DLS, Oxfordshire, United Kingdom
  
  A new slits prototype utilising a rotatable oxygen-free high thermal conductivity (OFHC) copper block to absorb high heat load is developed for the Diamond-II upgrade. The slits will be used at front end of Diamond I13 X-ray Imaging and Coherence beamline which has two canted beamline branches. Required by the beamline optics, the front end slits function as virtual sources for the 250 meters long beamline. Working for the dual beam geometry, these specialised slits can vary the size of one x-ray beam with rotational motions while allowing the second beam to pass through unaffected. The rotational operations of the slits are achieved by an innovative commercial flex pivot and a unique in-house designed pivoting flexure.  
poster icon Poster WEPPP032 [1.377 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP032  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 February 2024
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WEPPP034 ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions experiment, interface, cryogenics, synchrotron 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 icon 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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WEPPP044 Development of High Power Density Photon Absorber for Super-B Sections in SSRF photon, radiation, SRF, storage-ring 215
 
  • Q. Tang, Y. Liu, Q.L. Zhang, Y.L. Zhao
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  • C. Jin
    SKY Technology Development Co., Ltd. Chinese Academy of Sciences, Shengyang, People’s Republic of China
  
  There are two symmetrical standard bend sections been updated to super-bend sections in the storage of Shanghai Synchrotron Radiation Facility(SSRF). Photon absorbers made up of CuCrZr were used for absorbing radiation with very high power density in the super-bend sections. Meanwhile, CuCrZr absorbers were also used as beam chamber and pump port for the lattice of super-bend section is very compacted. The absorbing surface was designed as serrate structure in order to diminish the power density. CuCrZr was cold-forged before machining to enhance its strength, thermal conductivity and hardness. Friction welding is adopted for absorber fabrication to avoid the material properties of absorber deterioration. Rectangle flanges of absorbers were designed as step rather than knifer for vacuum seal. These high power density photon absorbers have been installed on the storage ring, both pressure and temperature being in accordance with design anticipation in the case of beam of 240 mA running.  
poster icon Poster WEPPP044 [1.597 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP044  
About • Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 02 April 2024
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WEPPP045 Particle-Free Engineering in SHINE Superconducting Linac Vacuum System cavity, cryomodule, FEL, linac 219
 
  • Y.L. Zhao, Y. Liu, Y.F. Liu, Q. Tang, L. Yin
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  
  The Shanghai high-repetition-rate XFEL and extreme light facility (SHINE) is under design and construction. The linac of SHINE facility is superconducting accelerat-ing structures of high gradients, whose performance is closely related to the cleanliness of superconducting cavities. Therefore, the beam line vacuum system has extremely high requirement for particle free to avoid particles down to submicrometric scale. To control parti-cle contamination, particle-free environment has been built for cavity string assembly and other beam line vacuum components installation, clean assembly criteri-on has been established. Furthermore, the particle gener-ation of vacuum components (valve, pump, et al.) has been studied. Moreover, dedicated equipment and com-ponent (slow pumping & slow venting system, non-contact RF shielding bellow) have been developed for particle-free vacuum system.  
poster icon Poster WEPPP045 [1.429 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP045  
About • Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 28 June 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPPP047 Installation Process Experiment of HEPS Storage Ring Equipment alignment, experiment, sextupole, storage-ring 222
 
  • C.H. Li, F.S. Chen, S.Y. Chen, L. Dong, G. Feng, S. Lu, Z.H. Wang, L. Wu, Y.F. Wu, Y.D. Xu, M. Yang, S. Yang
    IHEP, Beijing, People’s Republic of China
  
  HEPS is a new generation synchrotron radiation source under construction in China. In order to complete high-precision installation of the 1.4km storage ring within a limited construction period, it is necessary to identify and solve potential issues in various aspects, including opera-tion space, installation process, alignment scheme, and unit transportation, prior to the regular batch installation. Therefore, a full-process installation experiment was performed and the feasibility of relevant schemes are verified. Batch installation is currently in progress based on the experimental experience.  
poster icon Poster WEPPP047 [0.874 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP047  
About • Received ※ 20 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 23 March 2024
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WEPPP050 Quick scanning Channel-Cut crystal monochromator for millisecond time resolution EXAFS at HEPS controls, synchrotron, simulation, 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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WEPPP051 The Design of a 2 m Long Copper Light Extraction Vessel at Diamond Light Source for the Diamond-II Upgrade impedance, simulation, storage-ring, extraction 233
 
  • V. Danielyan, M.P. Cox, R.T. Fielder, S.L. Hodbod, T. Lockwood, P.J. Vivian
    DLS, Oxfordshire, United Kingdom
  
  Challenges associated with the design are, firstly, the heat loads of I05 beamline upgrade involving the installation of a powerful and highly divergent APPLE-II Knot Insertion Device. Secondly, it is not easy to produce the required homogeneous NEG (non-evaporable getter) coating on the complex internal geometry of the vessel. Synchrotron light raytracing and thermal analysis has shown that an aluminium vessel with discrete copper absorbers was not capable of handling the high heat loads and it was decided to change to a copper vessel with large integrated absorbing surfaces. FEA analysis of the copper vessel shows the peak temperature is reduced from 446°C to 95°C for the copper vessel as compared to the aluminium vessel. NEG coating trials are currently in progress and will be followed by a full prototype. The minimum vertical aperture is 6 mm and the trials will show whether it can be reduced to 5 mm. The change from an aluminium vessel to a copper vessel will not only reduce the peak temperature of the vessel thereby making it a workable solution, but has the added benefits of improved vacuum performance, reduced beam impedance and reduced capital and operating cost.  
poster icon Poster WEPPP051 [1.861 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP051  
About • Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 02 June 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, synchrotron, 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 icon 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THOBM04 Development of a Mirror Chamber System for SHINE Project ISOL, experiment, FEL, linac 266
 
  • F. Liu, S. He, W. Li, Z. Wang, T. Wu, H. Yuan, X. Zhang
    ShanghaiTech University, Shanghai, People’s Republic of China
  • J.H. Chen, L. Zhang, W. Zhu
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  
  A 5-dof mirror chamber test system was developed to adjust offset mirror or distribution mirror for the SHINE project. Two linear guides were used for horizontal translation and rough pitch adjustment. three vertical gearboxes were used for height, roll and yaw adjustments. in the vacuum, a fine flexure structure was engineered for the fine pitch adjustment with a piezo actuator. To prevent the cooling vibrations, the cooling module was seperately fixed and the heat from the mirror was conducted by Ga/In to the cooling block. Pitch angular vibration were measured by several equipments with different conditions. Results showed that the pitch angular vibration is below 40nrad without active vibration control, and below 10nrad with active vibration isolation system.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOBM04  
About • Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 23 February 2024
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THPPP002 Analysis of Hazards in a Flammable Gas Experiment and Development of a Testing Regime for a Polypropylene Vacuum Window experiment, Windows, cryogenics, operation 270
 
  • S.O. Bundrock, B. Billinghurst, X.E. Li, D.M. Smith
    CLS, Saskatoon, Saskatchewan, Canada
  
  Far Infrared Spectroscopy (Far-IR) is a bend magnet infrared beamline at the Canadian Light Source. The beamline utilizes a gas cell loaded with experimental gas which light is bounced through and a spectrometer to measure the absorption of the gas. For an experiment at Far-IR utilizing methane and nitrogen at 100K temperatures, issues with icing and inconsistent absorption gradients were noted at the Polymethylpentene Rigid Plastic (TPX TM) window separating the cell filled with the flammable gas mixture from the vacuum of the spectrometer. The possibility of replacing the existing windows with new 50-micron thick polypropylene windows was investigated. Material properties were not available for polypropylene at the operating temperature of the experiment. Due to the hazardous nature of the gas being held back a hazard analysis was carried out to identify potential risks and mitigations for the change. Additionally, with material properties unavailable, a testing regime was established to ensure the polypropylene could survive in the experimental environment. The experiment was successfully completed using the modified window assemblies.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP002  
About • Received ※ 19 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 08 December 2023
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THPPP005 Development of a Vacuum Chamber Disassembly and Assembly Handcart cavity, GUI, neutron, factory 277
 
  • X.J. Nie, J.X. Chen, H.Y. He, L. Liu, R.H. Liu, C.J. Ning, G.Y. Wang, J.B. Yu, Y.J. Yu, J.S. Zhang
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • L. Kang
    IHEP, Beijing, People’s Republic of China
  
  This paper developed a dedicated disassembly and assembly handcart for CSNS magnetic alloy cavity vacuum chamber. The optimal supporting section structure was determined by the use of ANSYS to analyze the strength of different sections. The stress situation of the handcart was improved by adding an extension rod at the end of the handcart. The installation position of the handcart was determined by the center position of the associated equipment. The development of the disassembly and assembly handcart structure was completed through structural optimization, disassembly and assembly process analysis, and positioning scheme design. The development of a handcart can improve the positioning accuracy of the vacuum chamber and prevent damage to the vacuum chamber during disassembly and assembly process.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP005  
About • Received ※ 24 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 November 2023
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THPPP010 Mechanical Analysis and Tests of Austenitic Stainless Steel Bolts for Beamline Flange Connection FEL, cryogenics, experiment, SRF 290
 
  • T.T. Zhen, H.X. Deng, R. Deng, F. Gao, L.J. Lu, S. Sun
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  
  Cryogenic tests of 1.3GHz superconducting accelerator cryomodule for the Shanghai Hard X-ray Free Electron Laser Installation Project(SHINE) are in progress. For better performance, a study of mechanical analysis and tests of austenitic stainless steel bolts for beamline flange connection has been done in preliminary work. In order to satisfy the residual magnetism and strength, high-strength austenitic stainless steel bolts are selected. For higher sealing performance, the torque coefficient is determined by compression test, the lower limit of yield of the bolts is obtained by tensile test, then the maximum torque applied to the bolts under real working conditions can be obtained according to the relationship between preload and torque. A finite element model is established to get the deformation curve of the gasket, and the measured results of gasket thickness are compared to ensure the reliability of the simulation. The deformation curve of the gasket is used to calculate the change of compression force under the temperature cycling load(cool down and warm-up). Finally, the results of residual magnetism show that the bolts have a negligible effect on magnetic field.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP010  
About • Received ※ 25 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 November 2023
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THPPP015 Mechanical Design of the Novel Precise Secondary Source Slits simulation, alignment, photon, GUI 303
 
  • X.X. Yan, Y.J. Gong, Z. Ji, J.Y. Liu, H. Qin
    IASF, Shenzhen, Guangdong, People’s Republic of China
  
  High-precision slits are extensively adopted in coherent or nano-focusing beamlines as the secondary source, which can accurately define or achieve a beam size at the micron or sub-micron scale, while maintaining high stability. This paper presents the design of a set of precise slits based on a flexure hinge mechanism, which enables a nano-scale resolution and a stroke of hundreds of microns simultaneously. The coarse or fine adjustment motion of each blade can be accomplished with or without a displacement amplification mechanism, which is driven by a piezo actuator. Furthermore, the kinematic and dynamics models are investigated through finite element analysis (FEA) and numerical analysis successively, yielding consistent results. The optimized slits system can provide a linear stroke of up to 400 um with a resolution of 10 nm both in horizontal and vertical directions, whose first Eigen frequency is 130 Hz.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP015  
About • Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 28 November 2023
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THPPP023 Design and Test of a New Crystal Assembly for a Double Crystal Monochromator monitoring, synchrotron, 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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THPPP029 Technologies Concerning Metal Seals of the UHV System for Accelerators interface, simulation, experiment, injection 322
 
  • H.Y. He, Y.S. Ma
    IHEP, Beijing, People’s Republic of China
  • L. Liu, P.C. Wang
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • B. Tan
    Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China
  
  Reviewed the domestic research on structural design and sealing function principle of the metal seals, wildly used in the Ultra High Vacuum (UHV) system for accelerators. Analyzed and summarized the key technologies concerning the material, contact forms, machining process and test methods of sealing performance. The study will become the basis of designing, machining and quality measuring for the ultra-vacuum metal seals. It provided the foundation for generating seals standards to promote the development of vacuum technology application.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP029  
About • Received ※ 27 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 November 2023
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THPPP040 The Girder System Prototype for ALBA II Storage Ring storage-ring, GUI, interface, lattice 335
 
  • L.R.M. Ribó, J.B. Boyer, C. Colldelram, N. González, L. Nikitina, F. Pérez
    ALBA-CELLS, Cerdanyola del Vallès, Spain
  
  The main goal of the upgrade of ALBA Synchrotron Light Facility into ALBA II is the transformation of the current accelerator into a diffraction limited storage ring, which implies the reduction of the emittance by at least a factor of twenty [1]. The upgrade will be executed before the end of the decade and will be profiting at maximum all existing ALBA infrastructures, in particular the building. The whole magnet layout of the lattice [2] has to be supported with a sequence of girders for their positioning with respect to another located in an adjacent girder with an accuracy of 50 µm to ensure the functionality of the accelerator. Besides the girders must enable the remote repositioning the magnets against the overall deformation of the site while ensuring the vibrational stability of the components on top. Easiness of assembling and installation of the different subsystems of the machine on top of the girder has to be considered also as a design requirement, in order to minimize the installation time. Two prototypes are planned to be built next year in order to check its full functionality
[1]ALBA II Accelerator Upgrade Project Status, IPAC¿23 proceedings
[2]Progress on the 6BA lattice for ALBAII, IPAC’23 proceedings
 		 
poster icon Poster THPPP040 [1.710 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP040  
About • Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 26 November 2023
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THPPP047 NEG Film Development and Massive Coating production for HEPS cathode, synchrotron, 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 synchrotron, 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 simulation, photon, synchrotron, 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 icon 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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