MEDSI2023 - List of Keywords (radiation)

Paper	Title	Other Keywords	Page
TUOAM05	Thermal-Deformation-Based X-Ray Active Optics Development in IHEP	optics, synchrotron, vacuum, synchrotron-radiation	10
	F.G. Yang, D.Z. Diao, H. Dong, J. Han, M. Li, W.F. Sheng, S.F. Wang, X.W. Zhang IHEP, Beijing, People’s Republic of China L. Kang IHEP CSNS, Guangdong Province, People’s Republic of China
	Funding: National Natural Science Foundation of China (11505212, 11875059); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2019012). Advanced light source require small wavefront distortion to maintain the quality of the X-ray beam. Active optical wavefront correction technology is a very important solution to solve the service problems of ultra-precise devices under such conditions. In this paper, we will report our recent progress on this active optics system development including surface metrology and mirror modulation. Based on the research of laser-heating-based thermal deformation modulation technology, this project proposes to modify the mirror surface of X-ray mirrors based on semiconductor microfabrication process, and modulate the local deformation of the mirror surface by electric heating to realize the surface shape correction /modulation of X-ray mirrors. Since the modulation unit acts directly on the reflective region of the mirror surface, it has a better surface shape correction capability than the conventional body deformation modulation. The solution also has the advantage of high efficiency and low cost. *Yang F, Li M, Gao L, et al. Laser-heating-based active optics for synchrotron radiation applications[J]. Optics Letters, 2016, 41(12): 2815-2818.
	Slides TUOAM05 [18.205 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM05
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 February 2024
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TUPYP004	A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates	cryogenics, vacuum, interface, alignment	37
	B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerque LNLS, Campinas, Brazil V.C. Kuriyama CNPEM, Campinas, SP, Brazil A. Lopes Ribeiro Federal University of Uberlandia, Uberlândia, M.G., Brazil J.H. dos Santos IF-UFRGS, Porto Alegre, Brazil
	The design of optical elements compass different development areas, such as optics, structures and dynamics, thermal, and control. In particular, the thermal designs of mirrors aim to minimize deformations, whose usual requirements are around 5 nm RMS and slope errors in the order of 150 nrad RMS. One of the main sources of uncertainties in thermal designs is the inconsistency in values of thermal contact resistances (TCR) found in the literature. A device based on the ASTM D5470 standard was proposed and designed to measure the TCR among materials commonly used in mirror systems. Precision engineering design tools were used to deal with the challenges related to the operation at cryogenic temperatures (145 K) and under several pressures rates (1~10 MPa) whilst ensuring the alignment between the specimens. We observed using indium as Thermal Interface Material reduced the TCR in 10~42,2% for SS316/Cu contacts, and 31~81% for Al/Cu. Upon analyzing the measurements, we identified some areas for improvements in the equipment, such as mitigating radiation and improving the heat flow in the cold part of the system that were implemented for the upgraded version.
	Poster TUPYP004 [2.549 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004
About •	Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024
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TUPYP023	Design of a Long Versatile Detector Tube System for Pink Beam Small-Angle X-Ray Scattering (SAXS) Beamline at HEPS	detector, experiment, vacuum, scattering	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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TUPYP028	Thermal Analysis Software for Optical Elements of Hefei Advanced Light Facility*	software, optics, interface, synchrotron	73
	M.H. Lin, J. Chen, S.K. Jiang, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Thermal deformation is a key influencing factor in the surface shape of optical components for beamline optics. In the process of beamline design, it is necessary not only to select different cooling schemes based on thermal loading conditions but also to extensively optimize the parameters of these cooling schemes. The traditional approach for optimizing cooling scheme design often requires significant manual effort. By integrating existing experience in optimizing cooling scheme designs, this study transforms the parameterized design tasks that were originally performed manually into automated processes using software. This paper presents the latest advancements in the automated design software for cooling schemes of beamline optical components, and the results indicate that the optimization outcomes of the existing automated design software are close to those achieved through manual optimization.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP028
About •	Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 03 December 2023
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TUPYP030	The Design of High Stability Double Crystal Monochromator for HALF	synchrotron, vacuum, optics, cryogenics	76
	Z.L. Xu, J. Chen, X.W. Du, Y. Peng, Q.P. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	HALF is a fourth-generation synchrotron light source with a number of state-of-the-art beamlines. Naturally, the new 4th generation machines, with their small emittances, start to bring higher stability performance requirements. In response to these problems, an concept of a high stability DCM (Double Crystal Monochromator) with angular range between 14 and 81 degrees (equivalent to 2 to 8 keV with Si(111)) has been developed at the National Synchrotron Radiation Laboratory. This poster gives an overview of the DCM prototype project including specifications, Mechanical design, heat load management and stability consideration.
	Poster TUPYP030 [1.221 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP030
About •	Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 24 January 2024
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TUPYP032	An Argon-Oxygen or Argon-Hydrogen Radio-Frequency Plasma Cleaning Device for Removing Carbon Contamination from Optical Surfaces	plasma, vacuum, synchrotron, experiment	79
	H.J. Yuan, X.W. Du, Q.P. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Due to synchrotron radiation, carbon contamination on the surfaces of optical elements inside the beamlines, such as mirrors and gratings, remains an issue. Future beamline designs will select more optical element surface coating materials according to the specific needs, including gold, platinum, chromium, nickel, and aluminum, and a single cleaning method will not be able to adequately address the demands. We have studied the RF plasma cleaning of optical elements. After the argon/oxygen or argon/hydrogen gas mixture was injected into the chamber, glow discharge was carried out, and the carbon on the surface of the inert metal-coated optical element and oxidation-prone metal-coated optical element was removed by the oxidation or reduction reaction of radicals. In order to optimize the discharge parameters, it utilizes a differential mass spectrometry system and an optical emission spectrometer to monitor the cleaning process. This paper introduces the principles of the two cleaning methods as well as our existing cleaning device.
	Poster TUPYP032 [2.493 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP032
About •	Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 19 December 2023
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TUPYP045	Usability Study to Qualify a Maintenance Robotic System for Large Scale Experimental Facility	experiment, framework, target, 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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TUPYP050	Design and Calculation of Vacuum System for WALS Storage Ring	vacuum, photon, storage-ring, synchrotron	105
	C.Y. Liu, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, Y. Nie, J. Wang, Y. Wang, G. Wei, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou IAS, Wuhan City, People’s Republic of China
	Funding: * Work supported by the Key R&D Project of Hubei Provincial Department of Science and Technology, No. 2021AFB001. Wuhan Advanced Light Source (WALS) is a fourth-generation synchrotron radiation facility with 1.5 GeV designed energy and 500 mA beam current. The storage ring vacuum system has to be designed in such a way which is compatible with a multi-bend achromat (MBA) compact lattice. the new technology of non-evaporable getter (NEG) coating was used, which is more and more popular in accelerator equipment. The design of the whole vacuum chamber and the nec-essary calculations were posted in the paper. The results indicated that the design of the vacuum system can meet the design requirement.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP050
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024
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WEPPP015	Progress of Front Ends at HEPS	photon, insertion-device, synchrotron, storage-ring	175
	H. Shi, P. Luo, Y.X. Ma, Y. Tan, H.Y. Wang IHEP, Beijing, People’s Republic of China
	High Energy Photon Source (HEPS) is a 6GeV synchrotron radiation facility building in Huairou, with a storage ring perimeter of 1390.6m and 41 straight sections. In phase I, 15 front ends will be installed, including 14 insertion device front ends and 1 bending magnet front end. These front ends are divided into three types: the Undulator front end, the Wiggler front end, and the BM front end. The U-type front end will receive 766W/mrad² of peak power density and 25kW of the total power. The design of the W-type front end is based on compatibility with various insertion devices, including udulators and wigglers. In this paper, the designs and the progress of HEPS front ends are presented.
	Poster WEPPP015 [2.147 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP015
About •	Received ※ 01 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 January 2024
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WEPPP016	Mechanical Design of XRS & RIXS Multi-Functional Spectrometer at the High Energy Photon Source	scattering, photon, synchrotron, synchrotron-radiation	178
	J.C. Zhang, Z.Y. Guo, X. Jia, S.X. Jin, Z.N. Ou, W.F. Sheng, S. Tang, R.Z. Xu, W. Xu, Y.J. Zhang IHEP, Beijing, People’s Republic of China
	The integration of an X-ray Raman spectroscopy (XRS) spectrometer and a Resonant Inelastic X-ray scattering (RIXS) spectrometer at HEPS is described. The XRS has 6 regular modular groups and 1 high resolution modular group. In total 90 pieces of spherically bent analyzer crystals are mounted in low vacuum chambers with pressure lower than 100Pa. On the other hand, the RIXS spectrometer possesses one spherically bent analyzer crystal configured in Rowland geometry whose diameter is changeable from 1m to 2m. The scattering X-ray photons transport mostly in helium chamber to reduce absorption by air. The RIXS and the high resolution module can be exchanged when needed. Six air feet are set under the granite plate to unload the weight when the heavy spectrometer is aligned. The natural frequency and statics of the main granite rack were analyzed and optimized to maintain high stability for the HEPS-ID33 beamline at the 4th generation source. A type of compact and cost-effective adjustment gadget for the crystals was designed and fabricated. Economic solutions in selection of motors and sensors and other aspects were adopted for building the large spectrometer like this.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP016
About •	Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 April 2024
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WEPPP019	Coating Removal of Silicon-Based Mirror in Synchrotron Radiation by Soluble Underlayers	optics, synchrotron, synchrotron-radiation, photon	181
	Q. Hou, G.C. Chang, B. Ji, M. Li, S.P. Yue IHEP, People’s Republic of China
	Multilayer optics is widely used for the x-ray beam monochromatization, focusing, and collimation in synchrotron light source. However, the multilayer coatings might be damaged by the high heat loads, the poor film adhesion, the high internal stress, or the inadequate vacuum conditions. As a result, it is essential to develop a method to make the optical substrate reusable without compromising its quality. In our published work, we successfully prepared a W/B4C multilayer coating with a 2 nm Cr buffer layer on a small-sized Si wafer. The coating was stripped from the Si substrate by dissolving the Cr buffer layer using an etchant. After the etching process, the sample’s roughness was comparable to that of a brand-new substrate. We have since utilized this method to clean the multilayers on the surface of a 20 cm × 5 cm silicon-based mirror for High Energy Photon Source (HEPS). The surface roughness and shape were measured, and they reached the level of a brand-new mirror.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP019
About •	Received ※ 02 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 19 December 2023
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WEPPP025	Application of CuCrZr in the Front-end of Shanghai Synchrotron Radiation Facility	synchrotron, vacuum, synchrotron-radiation, SRF	187
	S. Wu, Y. Li, J.N. Liu, J.W. Wang SARI-CAS, Pudong, Shanghai, People’s Republic of China
	Glidcop, oxygen free copper and other materials are mainly used in the Front-end of the Shanghai Synchrotron Radiation Facility(SSRF). CuCrZr material has high heat load capacity, high yield strength and tensile strength, good thermal conductivity and low vacuum outgassing rate. At present, it has been used as a heat sink material in the heat exchanger of nuclear reactors. In this paper, based on the previous process exploration, the Front-end absorber is made of CuCrZr material, and the technical scheme of integral processing of flange and absorber is adopted. The thermal stress and deformation of CuCrZr absorber are analyzed by finite element method, and the processing of CuCrZr absorber is completed, and it is applied to the SSRF BL04Ucanted front end. After a period of electron beam cleaning, vacuum and temperature tests were carried out under high thermal load power, and the characteristics of the material in practical use were analyzed, which proved that CuCrZr material can be used in SSRF under high heat load.
	Poster WEPPP025 [0.815 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP025
About •	Received ※ 01 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 December 2023
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WEPPP040	Experimental Methods Based on Grazing Incidence at the 1W1A Beamline of the Beijing Synchrotron Radiation Facility and Its Application inn Characterizing the Condensed State Structure of Conjugated Po	experiment, operation, synchrotron, synchrotron-radiation	210
	Y. Chen IHEP, Beijing, People’s Republic of China P. Cheng, H.X. Li Sichuan University, Chengdu, People’s Republic of China Y.C. Han CIAC, Changchun, People’s Republic of China
	The diffuse scattering experimental station of BSRF uses the dual focused monochromatic X-ray provided by 1W1A beam line to carry out structural research on crystal and film materials. This experimental station can carry out high-resolution XRD, XRR, GIXRD, GIWAXS/GISAXS and other experimental methods. GIWAXS/GISAXS is an important method for characterizing the condensed structure of conjugated polymers. We have upgraded and optimized the grazing incidence experimental method of the experimental station, and developed a grazing incidence remote rapid sampling platform. Greatly reduces testing time and enables remote online testing operations for users. Subsequently, we further established in-situ steam treatment, in-situ thermal annealing, in-situ drip coating, in-situ spin coating, in-situ scraping coating, and GISAXS testing platforms, enriching the line station grazing incidence testing methods.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP040
About •	Received ※ 30 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024
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WEPPP044	Development of High Power Density Photon Absorber for Super-B Sections in SSRF	photon, vacuum, SRF, storage-ring	215
	Q. Tang, Y. Liu, Q.L. Zhang, Y.L. Zhao SARI-CAS, Pudong, Shanghai, People’s Republic of China C. Jin SKY Technology Development Co., Ltd. Chinese Academy of Sciences, Shengyang, People’s Republic of China
	There are two symmetrical standard bend sections been updated to super-bend sections in the storage of Shanghai Synchrotron Radiation Facility(SSRF). Photon absorbers made up of CuCrZr were used for absorbing radiation with very high power density in the super-bend sections. Meanwhile, CuCrZr absorbers were also used as beam chamber and pump port for the lattice of super-bend section is very compacted. The absorbing surface was designed as serrate structure in order to diminish the power density. CuCrZr was cold-forged before machining to enhance its strength, thermal conductivity and hardness. Friction welding is adopted for absorber fabrication to avoid the material properties of absorber deterioration. Rectangle flanges of absorbers were designed as step rather than knifer for vacuum seal. These high power density photon absorbers have been installed on the storage ring, both pressure and temperature being in accordance with design anticipation in the case of beam of 240 mA running.
	Poster WEPPP044 [1.597 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP044
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 02 April 2024
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WEPPP049	Designs of Multiple Experimental Models for Pink SAXS Station	experiment, scattering, detector, 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
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THOAM04	Overall Progress on Development of X-ray Optics Mechanical Systems at High Energy Photon Source (HEPS)	optics, synchrotron, vacuum, synchrotron-radiation	252
	S. Tang, Y.H. Dong, X.H. Kuang, M. Li, H. Liang, R.Y. Liao, L.H. Ma, Z.N. Ou, H. Qian, Z.R. Ren, W.F. Sheng, J. Wang, R.Z. Xu, H.H. Yu IHEP, Beijing, People’s Republic of China
	Funding: This work is supported by the project of High Energy Photon Source (HEPS). High Energy Photon Source (HEPS) regarded as a new 4th generation synchrotron radiation facility, is under construction in a virgin green field in Beijing, China. The X-ray optics/mirror mechanical systems (MMS) play an important role, which would be expected to be designed carefully and rigidly for the extremely stable performance requirement of HEPS. In addition, there are indeed big challenges due to so many types of mirror systems, such as white beam mirror (WBM), harmonic suppression mirror (HSM), combined deflecting mirror (CDM), bending mirror, Nano-KB, and the transfocator of Compound refractive lens (CRLs), etc. Therefore, overall progress on design and maunfacturing of the MMS is introduced, in which a promoting strategy and generic mirror mechanical system as a key technology is presented and developed for the project of HEPS. Furthermore, ultra-stable structucture, multi-DOF precision positioning, Eutectic Galium Indium (E-GaIn)-based vibration-decoupling watercooling, clamping, and bending have always been prior designs and considerations. Shanzhi Tang, Weifan Sheng, Jianye Wang, et al, Overall progress on the design of mirror mechanical systems at High Energy Photon Source (HEPS), SRI2021, Hamburg Germany, 2022. POSTER
	Slides THOAM04 [2.328 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM04
About •	Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024
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THPPP008	Optimization of Thermal Deformation of a Horizontally Deflecting High-Heat-Load Mirror Based on eInGa Bath Cooling	synchrotron, factory, optics, undulator	283
	J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility. The synchrotron facility are developing towards higher brightness, lower divergence, narrower pulse, higher stability, etc. Therefore, the requirements of the first mirror of the beamline, who bear high-heat-load, were upgraded, and the performances of the mirror will be affected easily by other factors, such as flow induced vibration, clamping force, etc. Indirect water cooling based on eInGa bath is regarded as an effective mean to solve these thorny problems in designing of the first mirror cooling. However, for the case a horizontal de-flection mirror, the unilateral cooling method is usually adopted, resulting in some changes in the structure of the mirror. In this paper, a first mirror horizontally deflect-ing in Hefei advanced light source (HALF) are taken as examples to introduce the optimization method to achieve ultra-low meridian slope error of the first hori-zontal deflection mirror. The results show that this opti-mization method provides a rapid design mean to design the cooling scheme of the horizontally deflecting mirror based on the eInGa bath.
	Poster THPPP008 [2.901 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP008
About •	Received ※ 01 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 February 2024
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THPPP009	The Heat Load Calculation in the Grating-Based Beamline at Hefei Advanced Light Facility (HALF)	synchrotron, undulator, synchrotron-radiation, optics	287
	Z. Wang, J. Chen, X.W. Du, D. Feng, Q.P. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei diffraction limited light source. For the 4th generation synchrotron radiation (SR) light source, the heat load causes severe thermal deformation on the beamline optics as the emittance is reaching at the physical limit. The precise calculation of heat load on the optical elements is important for the thermal analysis including cooling method and thermal deformation simulation. A heat load calculation code has been developed for grating based SR beamline optics, which consists of modules of SR source simulation, mirror reflectivity and grating efficiency. The calculation results has been checked with SRCalc results. This code has been used to calculate the heat load of the Test Beamline optics at Hefei Advanced Light Facility (HALF). The heat absorbed by the first three optical elements¿including a toroidal mirror, a plane mirror and a plane grating¿is calculated. [1]R. Reininger. SRCalc (2001). Unpublished [2]L. Rebuffi, et.el., J. Synchrotron Radiat. 27: 1108-1120 (2020). [3]Z. Sun, et.al., The Innovation, 4 (6), 100514 (2023).
	Poster THPPP009 [1.853 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP009
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 09 January 2024
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THPPP013	Studies on the Influences of Longitudinal Gradient Bending Magnet Fabrication Tolerances on the Field Quality for SILF Storage Ring	HOM, storage-ring, extraction, synchrotron	296
	J. Zhu, D.H. Liang, Y. Shi, C.G. Wang, M. Zhang IASF, Shenzhen, Guangdong, People’s Republic of China
	The advanced storage ring of 4th generation synchrotron radiation facility, known as the diffraction-limited storage ring (DLSR), is based on multi-bend achromat (MBA) lattices, which enable an emittance reduction of one to two orders of magnitude pushing beyond the radiation brightness and coherence reached by the 3rd generation storage ring. The longitudinal gradient bending (LGB) magnets, with multiple magnetic field stages in beam line direction, are required in the DLSR to reduce the emittance. The permanent magnet based LGB magnets are selected for the Shenzhen Innovation Light-source Facility (SILF) due to the advantages of operation economy, compactness and stability compare to the electro-magnet. In this paper, the influences of typical LGB magnet fabrication tolerances on the field qualities are presented using a dedicated parameterized finite element (FE) model, such as the poles height and width tolerances, the pole tips parallelism (in different orientations) and etc. Meanwhile the influences of permanent magnets discreteness and the magnetic forces (between top and bottom pole tips) induced yoke deformation on the field qualities are studied and presented.
	Poster THPPP013 [0.599 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP013
About •	Received ※ 27 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 08 May 2024
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THPPP014	A Special-Shaped Copper Block Cooling Method for White Beam Mirrors Under Ultra-High Heat Loads*	synchrotron, synchrotron-radiation, controls, simulation	299
	J.Y. Liu, H. Qin, X.X. Yan IASF, Shenzhen, Guangdong, People’s Republic of China
	In order to fulfil the more stringent requirements of op-tical figure accuracy for cooled X-Ray mirrors imposed to high heat loads, especially from advanced insertion de-vices in the diffraction limited storage rings (DLSR), investigations on the cooling system for white beam mirrors are conducted in this paper. A special-shaped copper block (SSCB) cooling method is proposed, using eutectic indium-gallium alloy as heat transfer medium. The SSCB cooling technology can keep a 550mm-length mirror slope error of 0.2 ¿rad (RMS) under 230 W absorp-tion heat power, showing great advantages in the accura-cy and flexibility for thermal deformation minimization when compared with the traditional ones.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP014
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 10 December 2023
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THPPP028	Design and Analysis of CSNS-II Primary Stripper Foil	injection, GUI, operation, proton	319
	J.X. Chen, Y.J. Yu, J.S. Zhang IHEP CSNS, Guangdong Province, People’s Republic of China L. Kang, L. Liu, G.Y. Wang, J.B. Yu, J.Y. Zhang IHEP, Beijing, People’s Republic of China
	Funding: National Natural Science Foundation of China, 11975253 Stripper foil is a key equipment for converting negative hydrogen ions into protons in the RCS injection zone of CSNS. The structure of the CSNS primary stripper foil adopts a rotating steel strip structure, and the replacement time of the foil is long, requiring operators to carry out maintenance work in close proximity for a long time. The energy of CSNS-II injection beam has significantly increased from 80MeV to 300MeV, and the radiation dose in the injection area will also increase, making it impossible to maintain the equipment in close proximity for a long time. Therefore, it is necessary to redesign the primary stripper foil. This article will analyze the stripper efficiency and beam injection thermodynamics of CSNS-II stripper foil, carry out automatic foil store replacement structure design, motion analysis, and prototype testing, and envision remote maintenance solutions to achieve maintenance and repair of the stripper foil with minimal human intervention.
	Poster THPPP028 [3.748 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP028
About •	Received ※ 31 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 04 March 2024
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THPPP036	Prototype of High Stability Mechanical Support for SHINE Project	quadrupole, undulator, feedback, FEL	328
	R. Deng, H.X. Deng, F. Gao, X. Huang, Z. Lei, T.T. Zhen SARI-CAS, Pudong, Shanghai, People’s Republic of China
	Funding: CAS Project for Young Scientists in Basic Research (YSBR-042), National Natural Science Foundation of China (12125508, 11935020)¿Program of Shanghai Academic/Technology Research Leader (21XD1404100). Quadrupole stability of undulator segment is key to the beam performance in SHINE project. Vibration stability requirement of quadrupole is not larger than 200nm displacement RMS between 1 and 100Hz, but the field test of SHINE tunnel shows that the underground vibration during the day time is greater than 200nm. In this paper, a mechanical support including marble base and active vibration reduction platform is sophisticated designed. With this support, vibration stability of the key quadrupole is expected to be improved and the performances of the quadrupole meet the demands.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP036
About •	Received ※ 25 October 2023 — Revised ※ 07 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 January 2024
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Paper

Title

Other Keywords

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TUOAM05

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

optics, synchrotron, vacuum, synchrotron-radiation

10

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

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

Slides TUOAM05 [18.205 MB]

DOI •

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

About •

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

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TUPYP004

A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates

cryogenics, vacuum, interface, alignment

37

B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerque
LNLS, Campinas, Brazil
V.C. Kuriyama
CNPEM, Campinas, SP, Brazil
A. Lopes Ribeiro
Federal University of Uberlandia, Uberlândia, M.G., Brazil
J.H. dos Santos
IF-UFRGS, Porto Alegre, Brazil

The design of optical elements compass different development areas, such as optics, structures and dynamics, thermal, and control. In particular, the thermal designs of mirrors aim to minimize deformations, whose usual requirements are around 5 nm RMS and slope errors in the order of 150 nrad RMS. One of the main sources of uncertainties in thermal designs is the inconsistency in values of thermal contact resistances (TCR) found in the literature. A device based on the ASTM D5470 standard was proposed and designed to measure the TCR among materials commonly used in mirror systems. Precision engineering design tools were used to deal with the challenges related to the operation at cryogenic temperatures (145 K) and under several pressures rates (1~10 MPa) whilst ensuring the alignment between the specimens. We observed using indium as Thermal Interface Material reduced the TCR in 10~42,2% for SS316/Cu contacts, and 31~81% for Al/Cu. Upon analyzing the measurements, we identified some areas for improvements in the equipment, such as mitigating radiation and improving the heat flow in the cold part of the system that were implemented for the upgraded version.

Poster TUPYP004 [2.549 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004

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Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024

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TUPYP023

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

detector, experiment, vacuum, scattering

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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TUPYP028

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

software, optics, interface, synchrotron

73

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

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

DOI •

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

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

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TUPYP030

The Design of High Stability Double Crystal Monochromator for HALF

synchrotron, vacuum, optics, cryogenics

76

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

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

Poster TUPYP030 [1.221 MB]

DOI •

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

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

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TUPYP032

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

plasma, vacuum, synchrotron, experiment

79

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

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

Poster TUPYP032 [2.493 MB]

DOI •

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

About •

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

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TUPYP045

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

experiment, framework, target, 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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TUPYP050

Design and Calculation of Vacuum System for WALS Storage Ring

vacuum, photon, storage-ring, synchrotron

105

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

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

DOI •

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

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

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WEPPP015

Progress of Front Ends at HEPS

photon, insertion-device, synchrotron, storage-ring

175

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

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

Poster WEPPP015 [2.147 MB]

DOI •

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

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

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WEPPP016

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

scattering, photon, synchrotron, synchrotron-radiation

178

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

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

DOI •

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

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

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WEPPP019

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

optics, synchrotron, synchrotron-radiation, photon

181

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

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

DOI •

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

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

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WEPPP025

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

synchrotron, vacuum, synchrotron-radiation, SRF

187

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

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

Poster WEPPP025 [0.815 MB]

DOI •

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

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

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WEPPP040

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

experiment, operation, synchrotron, synchrotron-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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WEPPP044

Development of High Power Density Photon Absorber for Super-B Sections in SSRF

photon, vacuum, SRF, storage-ring

215

Q. Tang, Y. Liu, Q.L. Zhang, Y.L. Zhao
SARI-CAS, Pudong, Shanghai, People’s Republic of China
C. Jin
SKY Technology Development Co., Ltd. Chinese Academy of Sciences, Shengyang, People’s Republic of China

There are two symmetrical standard bend sections been updated to super-bend sections in the storage of Shanghai Synchrotron Radiation Facility(SSRF). Photon absorbers made up of CuCrZr were used for absorbing radiation with very high power density in the super-bend sections. Meanwhile, CuCrZr absorbers were also used as beam chamber and pump port for the lattice of super-bend section is very compacted. The absorbing surface was designed as serrate structure in order to diminish the power density. CuCrZr was cold-forged before machining to enhance its strength, thermal conductivity and hardness. Friction welding is adopted for absorber fabrication to avoid the material properties of absorber deterioration. Rectangle flanges of absorbers were designed as step rather than knifer for vacuum seal. These high power density photon absorbers have been installed on the storage ring, both pressure and temperature being in accordance with design anticipation in the case of beam of 240 mA running.

Poster WEPPP044 [1.597 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP044

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Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 02 April 2024

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WEPPP049

Designs of Multiple Experimental Models for Pink SAXS Station

experiment, scattering, detector, 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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THOAM04

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

optics, synchrotron, vacuum, synchrotron-radiation

252

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

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

Slides THOAM04 [2.328 MB]

DOI •

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

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

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THPPP008

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

synchrotron, factory, optics, undulator

283

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

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

Poster THPPP008 [2.901 MB]

DOI •

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

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

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THPPP009

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

synchrotron, undulator, synchrotron-radiation, optics

287

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

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

Poster THPPP009 [1.853 MB]

DOI •

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

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

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

THPPP013

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

HOM, storage-ring, extraction, synchrotron

296

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

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

Poster THPPP013 [0.599 MB]

DOI •

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

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

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THPPP014

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

synchrotron, synchrotron-radiation, controls, simulation

299

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

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

DOI •

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

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

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THPPP028

Design and Analysis of CSNS-II Primary Stripper Foil

injection, GUI, operation, proton

319

J.X. Chen, Y.J. Yu, J.S. Zhang
IHEP CSNS, Guangdong Province, People’s Republic of China
L. Kang, L. Liu, G.Y. Wang, J.B. Yu, J.Y. Zhang
IHEP, Beijing, People’s Republic of China

Funding: National Natural Science Foundation of China, 11975253
Stripper foil is a key equipment for converting negative hydrogen ions into protons in the RCS injection zone of CSNS. The structure of the CSNS primary stripper foil adopts a rotating steel strip structure, and the replacement time of the foil is long, requiring operators to carry out maintenance work in close proximity for a long time. The energy of CSNS-II injection beam has significantly increased from 80MeV to 300MeV, and the radiation dose in the injection area will also increase, making it impossible to maintain the equipment in close proximity for a long time. Therefore, it is necessary to redesign the primary stripper foil. This article will analyze the stripper efficiency and beam injection thermodynamics of CSNS-II stripper foil, carry out automatic foil store replacement structure design, motion analysis, and prototype testing, and envision remote maintenance solutions to achieve maintenance and repair of the stripper foil with minimal human intervention.

Poster THPPP028 [3.748 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP028

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Received ※ 31 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 04 March 2024

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THPPP036

Prototype of High Stability Mechanical Support for SHINE Project

quadrupole, undulator, feedback, FEL

328

R. Deng, H.X. Deng, F. Gao, X. Huang, Z. Lei, T.T. Zhen
SARI-CAS, Pudong, Shanghai, People’s Republic of China

Funding: CAS Project for Young Scientists in Basic Research (YSBR-042), National Natural Science Foundation of China (12125508, 11935020)¿Program of Shanghai Academic/Technology Research Leader (21XD1404100).
Quadrupole stability of undulator segment is key to the beam performance in SHINE project. Vibration stability requirement of quadrupole is not larger than 200nm displacement RMS between 1 and 100Hz, but the field test of SHINE tunnel shows that the underground vibration during the day time is greater than 200nm. In this paper, a mechanical support including marble base and active vibration reduction platform is sophisticated designed. With this support, vibration stability of the key quadrupole is expected to be improved and the performances of the quadrupole meet the demands.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP036

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Received ※ 25 October 2023 — Revised ※ 07 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 January 2024

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