MEDSI2023 - List of Keywords (experiment)

Paper	Title	Other Keywords	Page
TUOAM02	Update of the BM18 ESRF Beamline Development: Presentation of Selected Equipment and Their Commissioning	detector, vacuum, SRF, 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 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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TUOAM04	New Developments and Status of XAIRA, the New Microfocus MX Beamline at the ALBA Synchrotron	detector, optics, synchrotron, cryogenics	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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TUOBM01	ForMAX: A Beamline for Multi-Scale and Multi-Modal Structural Characterisation of Hierarchical Materials	detector, focusing, scattering, operation	15
	J.B. González Fernández, V.H. Haghighat, S.A. McDonald, K. Nygård, L.K. Roslund MAX IV Laboratory, Lund University, Lund, Sweden
	Funding: Knut and Alice Wallenberg Foundation ForMAX is an advanced beamline at MAX IV Laboratory, enabling multi-scale structural characterisation of hierarchical materials from nm to mm length scales with high temporal resolution. It combines full-field microtomography with small- and wide-angle x-ray scattering (SWAXS) techniques, operating at 8-25 keV and providing a variable beam size. The beamline supports SWAXS, scanning SWAXS imaging, absorption contrast tomography, propagation-based phase contrast tomography, and fast tomography. The experimental station is a versatile in-house design, tailored for various sample environments, allowing seamless integration of multiple techniques in the same experiment. The end station features a nine-meter-long evacuated flight tube with a motorized small-angle x-ray scattering (SAXS) detector trolley. Additionally, a granite gantry enables independent movement of the tomography microscope and custom-designed wide-angle x-ray (WAXS) detector. These features facilitate efficient switching and sequential combination of techniques. With commissioning completed in 2022, ForMAX End Station has demonstrated excellent performance and reliability in numerous high-quality experiments.
	Slides TUOBM01 [85.355 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM01
About •	Received ※ 23 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 12 May 2024
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TUPYP015	Investigation of Vibrations Attenuation with Different Frequency Along HEPS Ground	site, controls, ion-source, storage-ring	48
	Y. Yang, X.Y. Tan, Z.H. Wang, F. Yan IHEP, Beijing, People’s Republic of China X.R. Fu, W. Wu, L. Yan CAU, Haidian District, Beijing, People’s Republic of China J. Lei Peking University, Beijing, Haidian District, People’s Republic of China
	High Energy Photon Source (HEPS) has a strict restriction on vibration instabilities. To fulfill the stability specification, vibration levels on HEPS site must be controlled. The control standards are highly related with the vibration amplitude of the sources and the distance between sources and the critical positions. To establish reasonable regulations for new-built vibration sources, the decay patterns on ground are investigated on HEPS site for different frequency noises. A series of experiments were conducted using shaker to generate vibrations with frequency from 1Hz up to 100Hz. The vibration attenuation on ground and slab were measured using seismometers and the attenuation law were analyzed. Details will be presented in this paper.
	Poster TUPYP015 [0.525 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP015
About •	Received ※ 08 November 2023 — Revised ※ 08 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 12 April 2024
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TUPYP017	Design and Test of Precision Mechanics for High Energy Resolution Monochromator at the HEPS	synchrotron, 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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TUPYP023	Design of a Long Versatile Detector Tube System for Pink Beam Small-Angle X-Ray Scattering (SAXS) Beamline at HEPS	detector, vacuum, 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 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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TUPYP026	Influence of the Groove Curvature on the Spectral Resolution in a Varied-Line-Spacing Plane Grating Monochromator (VLS-PGM)	photon, factory, synchrotron, target	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, synchrotron, vacuum	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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TUPYP032	An Argon-Oxygen or Argon-Hydrogen Radio-Frequency Plasma Cleaning Device for Removing Carbon Contamination from Optical Surfaces	plasma, vacuum, synchrotron, radiation	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, synchrotron, 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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TUPYP043	The Design of Test Beamline at HEPS	brightness, photon, wiggler, undulator	90
	J.L. Yang, Q.J. Jia, M. Li, P. Liu, Y. Tao IHEP, People’s Republic of China
	This paper describes the design of a test beamline for a new generation of high-energy, high-flux, and high-coherence SR beamlines. The beamline will be built at ID42 of HEPS. The beamline includes two sources, a wiggler and an undulator, to provide high-energy, high thermal power, large size, and high-coherence, high-brightness X-ray beams, respectively. In the current design, the beamline mainly has optical components such as monochromators, CRLs, and filters. With different combinations of sources and optical components, the beamline can provide various modes, including white, monochromatic, and focused beam. Using a Si111 DCM, the beamline covers a wide photon energy range from 5 to 45 keV. In the future, the beamline will be capable of providing monochromatic beam with photon energy over 300 keV. The wiggler’s white beam can provide high thermal load test conditions over 1 kW. The beamline offers high flexibility and versatility in terms of available beam size (from micrometers to over 100 mm), energy resolution, and photon flux range. Various experimental techniques including diffraction, spectroscopy, imaging, and at-wavelength measurement can be performed on this beamline.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP043
About •	Received ※ 08 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024
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TUPYP045	Usability Study to Qualify a Maintenance Robotic System for Large Scale Experimental Facility	framework, target, radiation, hardware	93
	J.Y. Zhang, L. Kang IHEP, People’s Republic of China J.X. Chen, R.H. Liu, J.B. Yu IHEP CSNS, Guangdong Province, People’s Republic of China J.Y. Zhang UCAS, Beijing, People’s Republic of China
	Funding: This work was supported by the National Natural Science Foundation of China (NSFC)[E0113T5C10],and the Institute for High Energy Physics University of Chinese Academy of Sciences. The primary stripper foil device is one of the most critical devices of The China Spallation Neutron Source Project Phase-II (CSNS-II), which requires regular foil replacement maintenance to ensure its stable operation. To mitigate the potential hazards posed to workers by prolonged exposure to high levels of radiation, a maintenance robotic system has been developed to perform repetitive and precise foil changing task. The proposed framework encompasses various aspects of the robotic system, including hardware structure, target detection, manipulator kinematics design, and system construction. The correctness and efficiency of the sys-tem are demonstrated through simulations carried out using ROS Moveit! and GAZEBO.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP045
About •	Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 28 January 2024
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TUPYP047	Design of Liquid Injection Device for the Hard X-Ray Ultrafast Spectroscopy Experiment Station	FEL, electron, free-electron-laser, injection	97
	L.H. Li, B. Li, X. Liu, J.W. Meng, T.C. Weng, K.Y. Zhang, R.X. Zhu ShanghaiTech University, Shanghai, People’s Republic of China
	Funding: The National Natural Science Foundation of China (Grant NO.21727801), the Shanghai Sailing Program (No.22YF1454600). The Hard X-ray Ultrafast Spectroscopy Experiment Station (HXS) of the Shanghai high repetition rate XFEL and extreme light facility (SHINE) requires the design and manufacture of a specialized liquid sample injection device when studying the liquid phase state of matter. Due to the damage caused by high-repetition-rate XFEL pulses on the sample, it is necessary to ensure that the liquid sample is refreshed before the next pulse arrives. In order to reduce the impact of liquid film thickness on pump-probe ultrafast spectroscopy experiments, it is required that the liquid film thickness be less than 20 ¿m. This article describes the use of oblique collision of two jets, from simulation calculation to the construction of experimental device, and the use of absorption spectroscopy principle to construct a thickness characterization system. This system can stably produce ultrathin liquid films with thickness ranging from 3-20 ¿m. This article proposes views on the limitations and future improvements of this device.
	Poster TUPYP047 [0.494 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP047
About •	Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 December 2023
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TUPYP051	Progress of WALS NEG Coating Equipment and Technology	vacuum, controls, target, 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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TUPYP055	Application of QXAFS in the Medium-Energy X-ray Absorption Spectroscopy	synchrotron, 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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WEPPP010	The MID Instrument of European XFEL: Upgrades and Experimental Setups	detector, laser, FEL, vacuum	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 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, vacuum, electron, FEL	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 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, laser, electron, vacuum	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 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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WEPPP029	A Novel Flexible Design of the FaXToR End Station at ALBA	detector, GUI, photon, synchrotron	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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP030	MAX IV –- MicroMAX Detector Stage	detector, GUI, resonance, alignment	193
	S.M. Benedictsson, M.A. Al-Najdawi, O. Aurelius, G. Felcsuti, J. Lidón-Simon, M. Milas, T. Ursby MAX IV Laboratory, Lund University, Lund, Sweden
	Funding: "Funded by Novo Nordisk Fonden for the MicroMAX project, grant number NNF17CC0030666" The MicroMAX beamline at MAX IV Laboratory will employ two detectors to be used independently and move along the beam depending on the diffraction target resolution, starting close to the sample hanging partially over the sample table. The X-ray beam can be deflected by Kirkpatrick-Baez (KB) mirrors in the horizontal and vertical directions or pass undeflected. The MAX IV Design office designed a detector stage as an in-house project based on the ALBA table skin concept [1] to switch between the two detectors and accurately position the selected detector, either with or without the KB mirrors. To achieve stability and precision during translations, a large granite block is used, as well as preloaded linear and radial guides, and preloaded ball screws with stepper motors and, in most cases, a gear box. Flexures are used to allow linear motion’s pitch and yaw angles. The various motions are layered so that alignment to the beam axis can be done first, and then sample-to-detector distance can be adjusted independently. A Finite Element Analysis (FEA) were performed to achieve a stable design and measurements of resonance frequencies on the finalized stage were done to verify it. * Colldelram C., Rudget C., Nikitina L. October 2011. ALBA XALOC beamline diffractometer table skin concept design. Diamond Light Source Proceedings.
	Poster WEPPP030 [58.619 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP030
About •	Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 January 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP034	ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions	interface, vacuum, 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 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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP035	Design and Fluid Dynamics Study of a Recoverable Helium Sample Environment System for Optimal Data Quality in the New Microfocus MX Beamline at the ALBA Synchrotron Light Source	detector, operation, cryogenics, MMI	203
	M. Quispe, J.J. Casas, C. Colldelram, D. Garriga, N. González, J. Juanhuix, J. Nicolàs, Y. Nikitin ALBA-CELLS, Cerdanyola del Vallès, Spain M. Rabasa ESEIAAT, Terrassa, Spain
	XAIRA is the new microfocus MX beamline under construction at the ALBA Synchrotron Light Source. For its experiments, the quality will be optimized by enclosing all the end station elements, including the diffractometer in a helium chamber, so that the background due to air scattering is minimized and the beam is not attenuated in the low photon energy range, down to 4 keV. This novel type of chamber comes with new challenges from the point of view of stability control and operation in low pressure conditions while enabling the recovery of the consumed helium. In particular, it is planned to collect the helium gas with a purity > 99.5% and then to recover the gas at the ALBA Helium Liquefaction Plant. Besides, the circuit includes a dedicated branch to recirculate the helium used by the goniometer bearing at the diffractometer. This paper describes the fluid dynamic conceptual design of the Helium chamber and its gas circuit, as well as numerical results based on one-dimensional studies and Computational Fluid Dynamics (CFD).
	Poster WEPPP035 [1.794 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP035
About •	Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 June 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP039	Data Preprocessing Method of High-Frequency Sampling XAFS Spectra Collected in a Novel Combined SAXS/XRD/XAFS Technique	detector, synchrotron, 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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

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

WEPPP047	Installation Process Experiment of HEPS Storage Ring Equipment	alignment, sextupole, vacuum, 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 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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP049	Designs of Multiple Experimental Models for Pink SAXS Station	scattering, detector, radiation, undulator	226
	G. Mo, Z.J. Chen, Z.Q. Cui, Z.H. Li, Y.P. Liu, Y. Tian, Z.H. Wu, X. Xing IHEP, Beijing, People’s Republic of China
	Pink SAXS (small angle X-ray scattering) station is dedicated to performing scattering experiments. A classical planar undulator is adopted as the beam source. The pink beam from the fundamental radiation of the undulator at the range of 8-12keV will be used directly after reflected by a pure silicon reflector. The high flux pink beam will be used to perform high time-resolution SAXS experiments. Monochromatic beam, which is obtained by a normal horizontal monochromator, also can be used alternately to perform high energy resolution experiments. Monochromatic beam and pink beam can be switched through moving in and out of the monochromator. The scattering background is reduced effectively using three sets of scatterless slits. Three diamond compound refractive lenses with different curvatures are employed to focus the 12keV monochromatic beam at sample position, detector position and infinite position respectively. A totally 24 meters long vacuum detector tube is adopted as SAXS camera. Three vacuum compatibility EIGER detectors are equipped at different positions to collect WAXS, SAXS and USAXS signals respectively. Then simultaneous USAXS/SAXS/WAXS measurement could be performed.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP049
About •	Received ※ 01 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 July 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOAM05	Modeling the Disturbances and the Dynamics of the New Micro CT Station for the MOGNO Beamline at Sirius/LNLS	synchrotron, 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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOBM04	Development of a Mirror Chamber System for SHINE Project	ISOL, vacuum, 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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP002	Analysis of Hazards in a Flammable Gas Experiment and Development of a Testing Regime for a Polypropylene Vacuum Window	Windows, vacuum, 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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THPPP010	Mechanical Analysis and Tests of Austenitic Stainless Steel Bolts for Beamline Flange Connection	FEL, cryogenics, vacuum, 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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

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	simulation, HOM, synchrotron, 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
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP029	Technologies Concerning Metal Seals of the UHV System for Accelerators	vacuum, interface, simulation, 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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FROAM01	Design and Testing of HEPS Storage Ring Magnet Support System	simulation, alignment, storage-ring, sextupole	358
	Z.H. Wang, S.Y. Chen, C.H. Li, M.X. Li, H. Wang, L. Wu, Y.D. Xu, S. Yang, N.C. Zhou IHEP, Beijing, People’s Republic of China
	Very low emittance of High Energy Photon Source (HEPS) demands high stability and adjusting performance of the magnet support. The alignment error between girders should be less than 50 ¿m. Based on that, the adjusting resolution of the girder are required to be less than 5 ¿m in both transverse and vertical directions. Besides, the natural frequency of magnet support system should be higher than 54 Hz to avoid the amplification of ground vibrations. To fulfill the requirements, during the development of the prototype, the structure was designed through topology optimization, static analysis, grouting experiments, dynamic stiffness test and modal analysis, and the rationality of the structure was verified through prototype experiments. During the tunnel installation, the performance of the magnet support system was again verified to be better than the design requirements through test work after installation.
	Slides FROAM01 [7.976 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-FROAM01
About •	Received ※ 25 October 2023 — Revised ※ 07 November 2023 — Accepted ※ 17 February 2024 — Issued ※ 12 March 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUOAM02

Update of the BM18 ESRF Beamline Development: Presentation of Selected Equipment and Their Commissioning

detector, vacuum, SRF, 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 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

Cite •

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TUOAM04

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

detector, optics, synchrotron, cryogenics

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)

TUOBM01

ForMAX: A Beamline for Multi-Scale and Multi-Modal Structural Characterisation of Hierarchical Materials

detector, focusing, scattering, operation

15

J.B. González Fernández, V.H. Haghighat, S.A. McDonald, K. Nygård, L.K. Roslund
MAX IV Laboratory, Lund University, Lund, Sweden

Funding: Knut and Alice Wallenberg Foundation
ForMAX is an advanced beamline at MAX IV Laboratory, enabling multi-scale structural characterisation of hierarchical materials from nm to mm length scales with high temporal resolution. It combines full-field microtomography with small- and wide-angle x-ray scattering (SWAXS) techniques, operating at 8-25 keV and providing a variable beam size. The beamline supports SWAXS, scanning SWAXS imaging, absorption contrast tomography, propagation-based phase contrast tomography, and fast tomography. The experimental station is a versatile in-house design, tailored for various sample environments, allowing seamless integration of multiple techniques in the same experiment. The end station features a nine-meter-long evacuated flight tube with a motorized small-angle x-ray scattering (SAXS) detector trolley. Additionally, a granite gantry enables independent movement of the tomography microscope and custom-designed wide-angle x-ray (WAXS) detector. These features facilitate efficient switching and sequential combination of techniques. With commissioning completed in 2022, ForMAX End Station has demonstrated excellent performance and reliability in numerous high-quality experiments.

Slides TUOBM01 [85.355 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM01

About •

Received ※ 23 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 12 May 2024

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TUPYP015

Investigation of Vibrations Attenuation with Different Frequency Along HEPS Ground

site, controls, ion-source, storage-ring

48

Y. Yang, X.Y. Tan, Z.H. Wang, F. Yan
IHEP, Beijing, People’s Republic of China
X.R. Fu, W. Wu, L. Yan
CAU, Haidian District, Beijing, People’s Republic of China
J. Lei
Peking University, Beijing, Haidian District, People’s Republic of China

High Energy Photon Source (HEPS) has a strict restriction on vibration instabilities. To fulfill the stability specification, vibration levels on HEPS site must be controlled. The control standards are highly related with the vibration amplitude of the sources and the distance between sources and the critical positions. To establish reasonable regulations for new-built vibration sources, the decay patterns on ground are investigated on HEPS site for different frequency noises. A series of experiments were conducted using shaker to generate vibrations with frequency from 1Hz up to 100Hz. The vibration attenuation on ground and slab were measured using seismometers and the attenuation law were analyzed. Details will be presented in this paper.

Poster TUPYP015 [0.525 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP015

About •

Received ※ 08 November 2023 — Revised ※ 08 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 12 April 2024

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TUPYP017

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

synchrotron, 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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TUPYP023

Design of a Long Versatile Detector Tube System for Pink Beam Small-Angle X-Ray Scattering (SAXS) Beamline at HEPS

detector, vacuum, 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 TUPYP023 [1.737 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP023

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Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 January 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, synchrotron, target

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, synchrotron, vacuum

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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TUPYP032

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

plasma, vacuum, synchrotron, radiation

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, synchrotron, 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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TUPYP043

The Design of Test Beamline at HEPS

brightness, photon, wiggler, undulator

90

J.L. Yang, Q.J. Jia, M. Li, P. Liu, Y. Tao
IHEP, People’s Republic of China

This paper describes the design of a test beamline for a new generation of high-energy, high-flux, and high-coherence SR beamlines. The beamline will be built at ID42 of HEPS. The beamline includes two sources, a wiggler and an undulator, to provide high-energy, high thermal power, large size, and high-coherence, high-brightness X-ray beams, respectively. In the current design, the beamline mainly has optical components such as monochromators, CRLs, and filters. With different combinations of sources and optical components, the beamline can provide various modes, including white, monochromatic, and focused beam. Using a Si111 DCM, the beamline covers a wide photon energy range from 5 to 45 keV. In the future, the beamline will be capable of providing monochromatic beam with photon energy over 300 keV. The wiggler’s white beam can provide high thermal load test conditions over 1 kW. The beamline offers high flexibility and versatility in terms of available beam size (from micrometers to over 100 mm), energy resolution, and photon flux range. Various experimental techniques including diffraction, spectroscopy, imaging, and at-wavelength measurement can be performed on this beamline.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP043

About •

Received ※ 08 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024

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TUPYP045

Usability Study to Qualify a Maintenance Robotic System for Large Scale Experimental Facility

framework, target, radiation, hardware

93

J.Y. Zhang, L. Kang
IHEP, People’s Republic of China
J.X. Chen, R.H. Liu, J.B. Yu
IHEP CSNS, Guangdong Province, People’s Republic of China
J.Y. Zhang
UCAS, Beijing, People’s Republic of China

Funding: This work was supported by the National Natural Science Foundation of China (NSFC)[E0113T5C10],and the Institute for High Energy Physics University of Chinese Academy of Sciences.
The primary stripper foil device is one of the most critical devices of The China Spallation Neutron Source Project Phase-II (CSNS-II), which requires regular foil replacement maintenance to ensure its stable operation. To mitigate the potential hazards posed to workers by prolonged exposure to high levels of radiation, a maintenance robotic system has been developed to perform repetitive and precise foil changing task. The proposed framework encompasses various aspects of the robotic system, including hardware structure, target detection, manipulator kinematics design, and system construction. The correctness and efficiency of the sys-tem are demonstrated through simulations carried out using ROS Moveit! and GAZEBO.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP045

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Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 28 January 2024

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TUPYP047

Design of Liquid Injection Device for the Hard X-Ray Ultrafast Spectroscopy Experiment Station

FEL, electron, free-electron-laser, injection

97

L.H. Li, B. Li, X. Liu, J.W. Meng, T.C. Weng, K.Y. Zhang, R.X. Zhu
ShanghaiTech University, Shanghai, People’s Republic of China

Funding: The National Natural Science Foundation of China (Grant NO.21727801), the Shanghai Sailing Program (No.22YF1454600).
The Hard X-ray Ultrafast Spectroscopy Experiment Station (HXS) of the Shanghai high repetition rate XFEL and extreme light facility (SHINE) requires the design and manufacture of a specialized liquid sample injection device when studying the liquid phase state of matter. Due to the damage caused by high-repetition-rate XFEL pulses on the sample, it is necessary to ensure that the liquid sample is refreshed before the next pulse arrives. In order to reduce the impact of liquid film thickness on pump-probe ultrafast spectroscopy experiments, it is required that the liquid film thickness be less than 20 ¿m. This article describes the use of oblique collision of two jets, from simulation calculation to the construction of experimental device, and the use of absorption spectroscopy principle to construct a thickness characterization system. This system can stably produce ultrathin liquid films with thickness ranging from 3-20 ¿m. This article proposes views on the limitations and future improvements of this device.

Poster TUPYP047 [0.494 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP047

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Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 December 2023

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TUPYP051

Progress of WALS NEG Coating Equipment and Technology

vacuum, controls, target, 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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TUPYP055

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

synchrotron, 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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WEPPP010

The MID Instrument of European XFEL: Upgrades and Experimental Setups

detector, laser, FEL, vacuum

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 WEPPP010 [5.728 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP010

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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, vacuum, electron, FEL

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 WEPPP012 [1.731 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP012

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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, laser, electron, vacuum

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 WEPPP013 [1.253 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP013

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Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 12 March 2024

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WEPPP029

A Novel Flexible Design of the FaXToR End Station at ALBA

detector, GUI, photon, synchrotron

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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WEPPP030

MAX IV –- MicroMAX Detector Stage

detector, GUI, resonance, alignment

193

S.M. Benedictsson, M.A. Al-Najdawi, O. Aurelius, G. Felcsuti, J. Lidón-Simon, M. Milas, T. Ursby
MAX IV Laboratory, Lund University, Lund, Sweden

Funding: "Funded by Novo Nordisk Fonden for the MicroMAX project, grant number NNF17CC0030666"
The MicroMAX beamline at MAX IV Laboratory will employ two detectors to be used independently and move along the beam depending on the diffraction target resolution, starting close to the sample hanging partially over the sample table. The X-ray beam can be deflected by Kirkpatrick-Baez (KB) mirrors in the horizontal and vertical directions or pass undeflected. The MAX IV Design office designed a detector stage as an in-house project based on the ALBA table skin concept [1] to switch between the two detectors and accurately position the selected detector, either with or without the KB mirrors. To achieve stability and precision during translations, a large granite block is used, as well as preloaded linear and radial guides, and preloaded ball screws with stepper motors and, in most cases, a gear box. Flexures are used to allow linear motion’s pitch and yaw angles. The various motions are layered so that alignment to the beam axis can be done first, and then sample-to-detector distance can be adjusted independently. A Finite Element Analysis (FEA) were performed to achieve a stable design and measurements of resonance frequencies on the finalized stage were done to verify it.
* Colldelram C., Rudget C., Nikitina L. October 2011. ALBA XALOC beamline diffractometer table skin concept design. Diamond Light Source Proceedings.

Poster WEPPP030 [58.619 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP030

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Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 January 2024

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WEPPP034

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

interface, vacuum, 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 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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WEPPP035

Design and Fluid Dynamics Study of a Recoverable Helium Sample Environment System for Optimal Data Quality in the New Microfocus MX Beamline at the ALBA Synchrotron Light Source

detector, operation, cryogenics, MMI

203

M. Quispe, J.J. Casas, C. Colldelram, D. Garriga, N. González, J. Juanhuix, J. Nicolàs, Y. Nikitin
ALBA-CELLS, Cerdanyola del Vallès, Spain
M. Rabasa
ESEIAAT, Terrassa, Spain

XAIRA is the new microfocus MX beamline under construction at the ALBA Synchrotron Light Source. For its experiments, the quality will be optimized by enclosing all the end station elements, including the diffractometer in a helium chamber, so that the background due to air scattering is minimized and the beam is not attenuated in the low photon energy range, down to 4 keV. This novel type of chamber comes with new challenges from the point of view of stability control and operation in low pressure conditions while enabling the recovery of the consumed helium. In particular, it is planned to collect the helium gas with a purity > 99.5% and then to recover the gas at the ALBA Helium Liquefaction Plant. Besides, the circuit includes a dedicated branch to recirculate the helium used by the goniometer bearing at the diffractometer. This paper describes the fluid dynamic conceptual design of the Helium chamber and its gas circuit, as well as numerical results based on one-dimensional studies and Computational Fluid Dynamics (CFD).

Poster WEPPP035 [1.794 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP035

About •

Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 June 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, synchrotron, 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

operation, synchrotron, 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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WEPPP047

Installation Process Experiment of HEPS Storage Ring Equipment

alignment, sextupole, vacuum, 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 WEPPP047 [0.874 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP047

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Received ※ 20 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 23 March 2024

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WEPPP049

Designs of Multiple Experimental Models for Pink SAXS Station

scattering, detector, radiation, undulator

226

G. Mo, Z.J. Chen, Z.Q. Cui, Z.H. Li, Y.P. Liu, Y. Tian, Z.H. Wu, X. Xing
IHEP, Beijing, People’s Republic of China

Pink SAXS (small angle X-ray scattering) station is dedicated to performing scattering experiments. A classical planar undulator is adopted as the beam source. The pink beam from the fundamental radiation of the undulator at the range of 8-12keV will be used directly after reflected by a pure silicon reflector. The high flux pink beam will be used to perform high time-resolution SAXS experiments. Monochromatic beam, which is obtained by a normal horizontal monochromator, also can be used alternately to perform high energy resolution experiments. Monochromatic beam and pink beam can be switched through moving in and out of the monochromator. The scattering background is reduced effectively using three sets of scatterless slits. Three diamond compound refractive lenses with different curvatures are employed to focus the 12keV monochromatic beam at sample position, detector position and infinite position respectively. A totally 24 meters long vacuum detector tube is adopted as SAXS camera. Three vacuum compatibility EIGER detectors are equipped at different positions to collect WAXS, SAXS and USAXS signals respectively. Then simultaneous USAXS/SAXS/WAXS measurement could be performed.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP049

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Received ※ 01 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 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

synchrotron, 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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THOBM04

Development of a Mirror Chamber System for SHINE Project

ISOL, vacuum, 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

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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

Windows, vacuum, 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

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Received ※ 19 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 08 December 2023

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THPPP010

Mechanical Analysis and Tests of Austenitic Stainless Steel Bolts for Beamline Flange Connection

FEL, cryogenics, vacuum, 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

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Received ※ 25 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 November 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

simulation, HOM, synchrotron, 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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THPPP029

Technologies Concerning Metal Seals of the UHV System for Accelerators

vacuum, interface, simulation, 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

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Received ※ 27 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 November 2023

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FROAM01

Design and Testing of HEPS Storage Ring Magnet Support System

simulation, alignment, storage-ring, sextupole

358

Z.H. Wang, S.Y. Chen, C.H. Li, M.X. Li, H. Wang, L. Wu, Y.D. Xu, S. Yang, N.C. Zhou
IHEP, Beijing, People’s Republic of China

Very low emittance of High Energy Photon Source (HEPS) demands high stability and adjusting performance of the magnet support. The alignment error between girders should be less than 50 ¿m. Based on that, the adjusting resolution of the girder are required to be less than 5 ¿m in both transverse and vertical directions. Besides, the natural frequency of magnet support system should be higher than 54 Hz to avoid the amplification of ground vibrations. To fulfill the requirements, during the development of the prototype, the structure was designed through topology optimization, static analysis, grouting experiments, dynamic stiffness test and modal analysis, and the rationality of the structure was verified through prototype experiments. During the tunnel installation, the performance of the magnet support system was again verified to be better than the design requirements through test work after installation.

Slides FROAM01 [7.976 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-FROAM01

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Received ※ 25 October 2023 — Revised ※ 07 November 2023 — Accepted ※ 17 February 2024 — Issued ※ 12 March 2024

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