TUPYP —  Young Delegate Poster Session   (07-Nov-23   16:10—17:30)
Chair: B. Mountford, ASCo, Clayton, Victoria, Australia
Paper Title Page
TUPYP001 Shining Light on Precision: Unraveling XBPMs at the Australian Synchrotron 33
 
  • B. Lin, J. McKinlay, S. Porsa, Y.E. Tan
    AS - ANSTO, Clayton, Australia
  
  At the Australian Synchrotron (AS), the need for nondestructive X-ray beam positioning monitors (XBPM) in the beamline front ends led to the development and installation of an in-house prototype using the photoelectric effect in 2021. This prototype served as a proof of concept and an initial step towards creating a customised solution for real time X-ray position monitoring. Of the new beamlines being installed at the AS, the High-Performance Macromolecular Crystallography (MX3) and Nanoprobe beamlines require XBPMs due to their small spot size and high stability requirements. However, a significant hurdle is the short distance from the source point to the XBPM location, resulting in an extremely restricted aperture to accurately monitor the beam position. Scaling down the photoelectric prototype to accommodate the available space has proven challenging, prompting us to explore alternative designs that utilize temperature-based methods to determine the beam position. This paper details insights made from investigating this alternative method and design.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP001  
About • Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 February 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP002
 Equipment Protection Shutter for the Sirius Beamlines Pre Front Ends  
 
  • L.C. Arruda, W.L. Andrade, G.T. Barreto, F.G.R. Carrera, D.R. Cavalcante, J.V.B. Franca, A.L. Malandrin, B.M. Ramos, T.M. Rocha, G.L.M.P. Rodrigues, D.R. Silva, G.H. Silva, U.R. Sposito, L.M. Volpe
    LNLS, Campinas, Brazil
  • P.H.S. Martins, D. Passuelo
    CNPEM, Campinas, SP, Brazil
  
  Funding: Work supported by the Brazilian Ministry of Science, Technology and Innovation
Due to equipment safety at Sirius, the Brazilian 4th generation synchrotron light source, there are conditions where the need to interrupt the beam being provided by the storage ring to the beamline is mandatory. To minimize the duration and quantity of storage ring beam interruptions as the number of beamlines increases, the installation of a new shutter was proposed between the storage ring and the beamline’s front end. This work presents an overview of the project motivation, modes of failures and their effects, project validation, device operation, and preliminary results.
L. C. Arruda et al., "Equipment and Personal Protection Systems for the Sirius Beamlines",ICALEPCS’21, Shanghai, China, Oct. 2021. 		 
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP004 A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates 37
 
  • B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerquepresenter
    LNLS, Campinas, Brazil
  • V.C. Kuriyama
    CNPEM, Campinas, SP, Brazil
  • A. Lopes Ribeiro
    Federal University of Uberlandia, Uberlândia, M.G., Brazil
  • J.H. dos Santos
    IF-UFRGS, Porto Alegre, Brazil
  
  The design of optical elements compass different development areas, such as optics, structures and dynamics, thermal, and control. In particular, the thermal designs of mirrors aim to minimize deformations, whose usual requirements are around 5 nm RMS and slope errors in the order of 150 nrad RMS. One of the main sources of uncertainties in thermal designs is the inconsistency in values of thermal contact resistances (TCR) found in the literature. A device based on the ASTM D5470 standard was proposed and designed to measure the TCR among materials commonly used in mirror systems. Precision engineering design tools were used to deal with the challenges related to the operation at cryogenic temperatures (145 K) and under several pressures rates (1~10 MPa) whilst ensuring the alignment between the specimens. We observed using indium as Thermal Interface Material reduced the TCR in 10~42,2% for SS316/Cu contacts, and 31~81% for Al/Cu. Upon analyzing the measurements, we identified some areas for improvements in the equipment, such as mitigating radiation and improving the heat flow in the cold part of the system that were implemented for the upgraded version.  
poster icon Poster TUPYP004 [2.549 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004  
About • Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP005 On the Performance of Cryogenic Cooling Systems for Optical Elements at Sirius/LNLS 40
 
  • B.A. Francisco, M.P. Calcanha, R.R. Geraldespresenter, L.M. Kofukuda, G.P. Lima, M. Saveri Silva, L.M. Volpe
    LNLS, Campinas, Brazil
  
  Funding: Ministry of Science, Technology and Innovation (MCTI)
Sirius’ long beamlines are equipped with cryogenic cooled optics to take advantage of the Silicon thermal diffusivity and expansion at those temperatures, contributing to the preservation of the beam profile. A series of improvements was evaluated from the experience in the employment of such cooling systems during the early years of operation. The main topic refers to the prevention of instabilities in the temperature of the optics due to variations in the liquid nitrogen cylinder pressure, refill automation or progressive variations of the convective coefficient into the cryostat. This work discusses the performance of these systems after optimizing the pressure of the vessels and their control logics, the effectiveness of occasional purges, cool down techniques, and presents the monitoring interface and interlock architecture. Moreover, we present the reached solution for achieving higher beam stability, considering liquid nitrogen flow active control (commercial and in-house). Also propose the approach for the future 350 mA operation, including different cooling mechanisms. 		 
poster icon Poster TUPYP005 [1.250 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP005  
About • Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 22 November 2023 — Issued ※ 18 July 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP008 Exactly Constrained, High Heat Load Design for SABIA’s First Mirror 44
 
  • V.B. Zilli, G.G. Basilio, J.C. Cezar, F.A. Del Nero, G.R.B. Ferreira, B.A. Francisco, M.E.O.A. Gardingo, R.R. Geraldes, A.C. Pinto, G.L.M.P. Rodrigues, L.M. Volpe, V.S. Ynamassu, R.G. de Oliveira
    LNLS, Campinas, Brazil
  • C. Ambrosio
    CNPEM, Campinas, SP, Brazil
  
  Funding: Ministry of Science, Technology and Innovation (MCTI)
The SABIA beamline (Soft x-ray ABsorption spectroscopy and ImAging) will operate in a range of 100 to 2000 eV and will perform XPS, PEEM and XMCD techniques at SIRIUS/LNLS. Thermal management on these soft x-ray beamlines is particularly challenging due to the high heat loads. SABIA’s first mirror (M1) absorbs about 360 W, with a maximum power density of 0.52 W/mm², and a water-cooled mirror was designed to handle this substantial heat load. To prolong the mirror operation lifetime, often shortened on soft X-ray beamlines due to carbon deposition on the mirror optical surface, a procedure was adopted using high partial pressure of O₂ into the vacuum chamber during the commissioning phase. The internal mechanism was designed to be exactly constrained using folded leaf springs. It presents one degree of freedom for control and alignment: a rotation around the vertical axis with a motion range of about ±0.6 mrad, provided by a piezoelectric actuator and measured using vacuum compatible linear encoders. This work describes the SABIA’s M1 exactly constrained, high heat absorbent design, its safety particularities compared to SIRIUS typical mirrors, and validation tests results. 		 
poster icon Poster TUPYP008 [1.582 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP008  
About • Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 21 February 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP010
 A Novel Coating to Avoid Corrosion Effect and Vibration Coupling Between Eutectic Gallium-Indium Alloy and Heat Sink Metal for X-Ray Optics Cooling  
 
  • T. He, M. Li, W.C. Liu, Z.N. Ou, Z.R. Ren, W.F. Sheng, S. Tang, J.L. Yang, H.H. Yu, X.M. Zhang
    IHEP, Beijing, People’s Republic of China
  • T. He, M. Li, W.C. Liu, W.F. Sheng, S. Tang, J.L. Yang, H.H. Yu, X.M. Zhang
    University of Chinese Academy of Sciences, Beijing, People’s Republic of China
  
  Although the vibration decoupling method based on eutectic gallium-indium (EGaIn) alloy performs excellent in suppressing parasitic vibration caused by the cooling medium and pipes of X-ray optics, the corrosion of EGaIn alloy to the heat sink metal still results in the solidification and the vibration decoupling failure. A novel anti-corrosion coating based on tungsten(W) is proposed. Through the analysis of the micromorphology and the chemical composition after heating for 36 hours at 250°C, there is no obvious evidence that W is corroded which is more effective than the widely used coating of nickle(Ni). And the W coating by using magnetron sputtering has been implemented for feasibility validation. Its corrosion resistance mechanism has also been fully analyzed. Besides, finite element analysis on the differences of vibration decoupling after applying W coatings and Ni coatings are also carried out and discussed. W is proved to be a considerable coating for vibration decoupling to face up to the challenge of the ultra-high requirements of high stability (~10nrad RMS), high surface shape accuracy (¿50nrad RMS) in diffraction-limited storage ring light source.  
poster icon Poster TUPYP010 [10.504 MB]  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP011
 Design of New Crystal Attitude Adjustment Module  
 
  • D.S. Shen
    IHEP, Beijing, People’s Republic of China
  
  Horizontal diffraction monochromator is a typical optical device in synchrotron radiation equipment, which is characterized by high angular accuracy and stability. The fourth generation light source has more strict requirements on spot stability and resolution. This paper introduces a new type of crystal attitude adjustment module, including the Angle adjustment mechanism and the roll Angle adjustment mechanism. In order to improve its stability, the flexible hinge with poor stiffness was optimized, and the auxiliary support hinge design was innovatively proposed to bear the axial load weight and increase the overall rigidity, and the stiffness of the mechanism was improved without increasing the driving force. Through the simulation calculation, the overall mode of the new crystal attitude adjustment module is 234Hz, the maximum stroke of the casting Angle is ±0.5°, and the maximum thrust required is only 40.0N. As the distance between the motor and the rotating center is increased, the resolution is also improved when the same driving motor is used. The new crystal attitude control module offers significant improvements in both stability and resolution.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP012
 Mechanical Design of Water-cooled White Beam Collimating Bent Mirror System at HEPS  
 
  • J.Y. Wang, M. Li, Z.R. Ren, W.F. Sheng, S. Tang, R.Z. Xu
    IHEP, Beijing, People’s Republic of China
  
  The main function of the Water-cooled White Beam Collimating Bent Mirror is to align the synchrotron radiation light to improve the resolution of its downstream monochromator; It also absorbs heat and reduces the heat load transmitted to the monochromator. Therefore, the accuracy of its posture directly affects the quality of the output beam. This article discusses the design of the device. It is mainly divided into 3 parts. The bending mechanism uses constant external force to elastically bend the optical elements to obtain the required surface shape. The cooling mechanism is used to reduce the thermal deformation of the mirror surface, thus reducing the surface error of the mirror. The overall mechanical system provides 5-DOF attitude adjustment. Based on this, this design adopts a combination scheme of a four-bar bender with independent bending moment, the copper blades inserted in the GaIn eutectic filled trough solution and 5-DOF attitude adjustment of multi-layer granite. Through a series of calculations, simulations and tests, it is demonstrated that the design indexes meet the requirements, thus verifying the feasibility of the scheme.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP013
 Highly Efficient Thermal Deformation Optimization Method for Smart-Cut Mirrors over the Entire Photon Energy Range  
 
  • S.F. Wang
    IHEP, Beijing, People’s Republic of China
  
  Funding: X-ray Mirror Innovation Cross Team, Chinese Academy of Sciences, (JCTD-2020-02) Measure and Study of Synchrotron Radiation Optical Components In Situ Environment, IHEP, 2019.
For heat load generated by synchrotron radiation, it is a challenge to optimize the thermal deformation of the mirror over the entire photon energy range. A theoretical method is used to quantitatively evaluate the influence of the thermal load on the thermal deformation of the mirror. The result of theoretical calculations and finite element analysis (FEA) are consistent, which proves the feasibility of the method. The thermal deformation optimization theory proposed in this paper requires only one round optimization calculation and check computation in FEA. Significantly reduce the workload of mirror design. And the design work has taken care of all the photon energy points. Avoid optimizing mirrors at a certain energy point, resulting in large deformations at other energy points. In addition, designers can predict the thermal deformation of the mirror at a certain energy point without FEA simulation. This will provide guidance for the correction of the spherical item of the WBM’s thermal deformation by downstream optics, such as focusing mirror, compound refractive lens (CRL) and so on. 		 
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP015 Investigation of Vibrations Attenuation with Different Frequency Along HEPS Ground 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 icon 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP016
 Quick Scanning Verification of a Monochromator Spindle Based Servo Control at BSRF  
 
  • Z.K. Liu, H. Liang
    IHEP, Beijing, People’s Republic of China
  
  A quick scanning monochromator built for Quick EXAFS experiments needs to perform 2 kinds of movements, one is fast movements in an oscillation way of the spindle, the other is step scan mode. Servo control has never been used on quick scanning monochromators. To verify the feasibility of the 2 modes on quick scanning monochromators by servo control, experiments are designed and carried out on a inhouse built air bearing spindle. An ACS controller is used to drive the motor, encoder provides the position feedback. A laser interferometer is used to measure the actual angular position of the spindle. Test method: The motor is controlled to move with a set trajectory of sinusoidal signals, and the feedback data from the interferometer and encoder are compared to verify the position and speed. The experiments show that with interferometer calibration, there is only 3% systematic error in the encoder feedback value. Overall the stepping mode can achieve a resolution of 0.4 arcsecond per step, and the scanning mode can achieve a 50 Hz, 0.08°sine signal tracking. It is possible to get better results by using lighter loads and motors with better performance.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP017 Design and Test of Precision Mechanics for High Energy Resolution Monochromator at the HEPS 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 icon 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP018 Design and Improvements of a Cryo-Cooled Horizontal Diffracting Double Crystal Monochromator for HEPS 55
 
  • Y.S. Zhang, H. Liang, Y.S. Lu, D.S. Shen, L. Zhang
    IHEP, Beijing, People’s Republic of China
  
  Horizontal diffracting double crystal monochromator(HDCM) are usually used in a 4th generation light source beamline due to the larger source size in the horizontal direction. This paper introduces the mechanical design and optimization of a HDCM for Low-dimension Structure Probe Beamline of HEPS. In order to achieve the high stability requirement of 50nrad RMS, the structural design is optimized and modal improved through FEA. In order to meet the requirement of a total crystal slope error below 0.3¿rad, FEA optimizations of the clamping for first and second crystal are carried out. The vacuum chamber is optimized to become more compact, improving the maintainability. Fabrication of the HDCM is under way. The results show that the design is capable of guarantee the required surface slope error, stability, and adjustment requirements.  
poster icon Poster TUPYP018 [1.172 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP018  
About • Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 May 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP019
 Optical Metrology of High Energy Photon Source  
 
  • C.R. Zhang, R.L. Cui, M. Li, D.N. Zhang
    IHEP, Beijing, People’s Republic of China
  
  Funding: High Energy Photon Source Platform of Advanced Photon Source technology research and development Beijing Synchrotron Radiation Facility, Institute of High Energy Physics
The fourth-generation synchrotron light sources-High Energy Photon Source(HEPS) requires the accuracy of X-ray mirror surface slope and height error to be as high as 50 nrad(rms) and 0.4nm (rms), respectively. Its a huge challenge to detect the X-ray mirrors with such high-precision specification. A new type long trace profiler named FSP (Flag-type Surface Profiler), which is independently developed by Institute of High Energy Physics, Chinese Academy of Sciences, providing high-precision surface shape Metrology services for the X-mirrors of HEPS. So far, we have completed the surface shape Metrology of 25 HEPS high-precision X-ray mirrors, and the surface shape Metrology of FSP were also recognize approved by JTEC. Among them, the Wolter diffraction limit focusing mirror processed by JTEC Company in Japan, the height error is 0.1nm RMS at 1mm high spatial resolution (0.11nm RMS for Wolter KB elliptic area and 0.12nm RMS for hyperbolic area). So far this is the most accurate X-ray mirror for HEPS. At the same time, we also developed the Spatial Frequency decomposition stitching Interferometer (FSI), the standard deviation of surface shape Metrology of FSP and FSI reached 0.33nm. 		 
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP020
 Optimization of Rotating Coil System for Magnetic Center Measurement and Its Application in High Energy Photon Source  
 
  • L.Y. Zhang
    IHEP, Beijing, People’s Republic of China
  
  Funding: This work is supported by the National Natural Science Foundation of China (NSFC) (Grant No.12075264).
To satisfy the rigorous requirements of precise alignment of large quantities of magnets in the High Energy Photon Source (HEPS), a simplified single-turn rotating coil system was designed to expedite the measurement process while maintaining high accuracy. Optimizing the system structure allowed for significant shortening of the measurement time. Furthermore, precision could be further raised by adding a three-coordinate measuring machine (CMM). In this paper, the system’s general design, upgrade, mathematical theory, and measurement results on magnets in the Booster of HEPS are introduced. Tests on an ultra-high quadrupole magnet revealed that the system met both precision and efficiency design requirements. It was confirmed that the entire procedure of installing and aligning the magnet, measuring the magnetic axis, and extracting the magnetic center to fiducials on the magnet, was reduced to just a few hours through the optimized design of the rotating coil system. The system has, subsequently, successfully accomplished the magnet fiducilization of the Booster of HEPS. Concluding remarks are made at the end. 		 
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP021 Development and Improvement of HEPS Mover 58
 
  • S. Yang, S.Y. Chen, C.H. Li, Z.H. Wang, L. Wu, Y.D. Xu
    IHEP, Beijing, People’s Republic of China
  
  Funding: Supported by the National Natural Science Foundation of China (No.12105295)
High Energy Photon Source (HEPS) has been constructed after decade of research. As the first diffraction-limited storage ring light source, many advanced devices are applied in this project, including the Beam Based Alignment Mover (Mover), which support and adjust the position of the Sextupole Magnet. It undertakes to remotely online adjust the position of Sextupole to meet the Physical requirement to correct the optics coefficient of Electron beam current. The positioning accuracy, attitude angle, and coupled error of Mover with 450kg load strictly proposed and tested during the development of Mover. There are three main types of Mover, including Four-layer with sliding guide, Three-layer with rolling guide, and Three-layer with sliding guide. This paper introduces the development and improvement of Mover. 		 
poster icon Poster TUPYP021 [0.842 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP021  
About • Received ※ 23 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 July 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP022 The Development and Application of Motion Control System for HEPS Beamline 61
 
  • Z.Y. Yue, X.B. Deng, Z.H. Gao, G. Li, Y. Liu, C.X. Yin, D.S. Zhang, Q. Zhang, A.Y. Zhou
    IHEP, Beijing, People’s Republic of China
  
  In synchrotron radiation facilities such as the High Energy Photon Source (HEPS) beamline, thousands of motorized actuators are equipped on different optical devices, such as K-B mirrors, monochromator and transfocators, in order to acquire the specified properties of X-ray. The motion control system, as a part of the ultra-precision mechatronics devices, is used to precison positioning control, which not only has ability to realize basic motion functions but also can handle complex motion control requirements. HEPS has developed a standardized motion control system(MCS) for synchrotron radiation applications. In this paper, The structure of hardware and software of MCS will be presented, and some applications are demonstrated in detail.  
poster icon Poster TUPYP022 [0.847 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP022  
About • Received ※ 30 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP023 Design of a Long Versatile Detector Tube System for Pink Beam Small-Angle X-Ray Scattering (SAXS) Beamline at HEPS 64
 
  • Z.Q. Cui, G. Mo, Z.N. Ou, S. Tang, X. Xing, J.C. Zhang
    IHEP, Bejing, People’s Republic of China
  
  The long versatile detector tube system for small-angle X-ray scattering meets the experimental conditions of -5-50° wide-angle X-ray scattering (WAXS), 0.04-6° small-angle X-ray scattering (SAXS) and 0.001-0.1° ultra-small-angle X-ray scattering (USAXS), record the same change process of the same sample, and obtain comprehensive structural information of atomic size, nanometer size and micron size, which can be applied to nanomaterials, mesoporous materials, biological macromolecules, polymers and other fields. The size of the tube system is 26760×1945×2565 mm,and consists of four parts: WAXS device, SAXS device, USAXS device and vacuum chamber. The vacuum chamber is assembled by connecting and assembling parts such as thick and fine pipes, bellows, heads and vacuum valves, with a length of 13775 mm and an inner diameter of 1500mm. The thin pipe is 7740 mm long and has an inner diameter of 300 mm. The design scheme of the tube system is committed to ensuring that the distance between the SAXS detector and the sample is continuously adjustable within the range of 1-13.5 m in vacuum environment, and the straightness of the 13840 mm long track of the SAXS device is better than 1 mm.  
poster icon Poster TUPYP023 [1.737 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP023  
About • Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 January 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP024
 Study of the TiZrV Getter Film Deposited on the Inner Surface of HEPS Undulator Vacuum Tube  
 
  • B.L. Zhu
    IHEP CSNS, Guangdong Province, People’s Republic of China
  
  The clean and stable ultra-high vacuum environment of the particle accelerator storage ring can reduce the beam loss caused by gas scattering, which is the basis for the long-term stable operation of the beam. The HEPS undulator vacuum system is a very small aperture elliptical pipe with an inner diameter of 22×7 mm. In order to meet the requirements of ultra-high vacuum of the narrow-gap insertion devices vacuum system, a non-evaporable getter (NEG) film is deposited on the inner wall of the tube. In this study, a magnetron sputtering coating system suitable for depositing NEG films on the inner wall of a narrow-gap elliptical pipe was designed and built, and TiZrV films were successfully obtained on the inner wall of an elliptical pipe. The microstructure, deposition rate, crystal structure and chemical composition of TiZrV thin films were studied by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The results show that the TiZrV film has a columnar structure and its crystal structure is amorphous. The atomic ratio of the three chemical elements in the TiZrV film is located in the low temperature activation region.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP025
 Thermal Analysis of Crotch Absorbers Designed for Hefei Advanced Light Facility  
 
  • B. Bian
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  The Hefei Advanced Light Facility (HALF) is a vacuum ultraviolet (VUV) and soft X-ray Diffraction-Limited Storage Ring (DLSR) light source, operating at 2.2 GeV with a beam current of 350 mA.The synchrotron radiation (SR) emitted from bend magnets (BM) and insertion devices (ID) has a pretty high power density, which can easily damage the vacuum components and cause the breakdown of the vacuum system. Typically, the crotch absorbers, installed at pump stations, block most of the heat load and allow parts of SR to be sent to the beamline for scientific research and applications.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP026 Influence of the Groove Curvature on the Spectral Resolution in a Varied-Line-Spacing Plane Grating Monochromator (VLS-PGM) 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 icon 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP027 A Subnanometer Linear Displacement Actuator 70
 
  • S.K. Jiang, X.W. Du, Q.P. Wang
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  With the development of synchrotron radiation technology, an actuator with sub-nanometer resolution, 100N driving force, and compatible with ultra-high vacuum environment is required. To achieve synchrotron radiation micro-nano focusing with adjustment resolution of sub-nanometer and high-precision rotation at the nano-arc level, most of the commercial piezoelectric actuators are difficult to meet the requirements of resolution and driving force at the same time. The flexure-based compound bridge-type hinge has the characteristic of amplifying or reducing the input displacement by a certain multiple, and can be used in an ultra-high vacuum environment. According to this characteristic, the bridge-type composite flexible hinge can be combined with commercial piezoelectric actuators, to design a new actuator with sub-nanometer resolution and a driving force of 100N. This poster mainly presents the principle of the new actuator, the design of the prototype and the preliminary test results of its resolution, stroke.  
poster icon Poster TUPYP027 [3.140 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP027  
About • Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 January 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP028 Thermal Analysis Software for Optical Elements of Hefei Advanced Light Facility* 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP029
 The Study on NEG Thin Film Coated by DC Magnetron Sputtering Based on COMSOL  
 
  • W.J. Ma
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  The NEG coated vacuum chambers provide an efficient solution to the obtaining of ultra-high vacuum in the diffraction limited storage ring (DSRL). During the DC magnetron sputtering process, the position of the cathode target will affect the quality of the NEG film. In this work, the simulation of the state of the glow discharge plasma was performed by COMSOL Multiphysics. The distribution of electric potential, argon ion number density and electron density during the discharge of the orthocentric and eccentric targets were simulated.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP030 The Design of High Stability Double Crystal Monochromator for HALF 76
 
  • Z.L. Xu, J. Chen, X.W. Du, Y. Peng, Q.P. Wang
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  HALF is a fourth-generation synchrotron light source with a number of state-of-the-art beamlines. Naturally, the new 4th generation machines, with their small emittances, start to bring higher stability performance requirements. In response to these problems, an concept of a high stability DCM (Double Crystal Monochromator) with angular range between 14 and 81 degrees (equivalent to 2 to 8 keV with Si(111)) has been developed at the National Synchrotron Radiation Laboratory. This poster gives an overview of the DCM prototype project including specifications, Mechanical design, heat load management and stability consideration.  
poster icon Poster TUPYP030 [1.221 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP030  
About • Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 24 January 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP032 An Argon-Oxygen or Argon-Hydrogen Radio-Frequency Plasma Cleaning Device for Removing Carbon Contamination from Optical Surfaces 79
 
  • H.J. Yuan, X.W. Du, Q.P. Wang
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  Due to synchrotron radiation, carbon contamination on the surfaces of optical elements inside the beamlines, such as mirrors and gratings, remains an issue. Future beamline designs will select more optical element surface coating materials according to the specific needs, including gold, platinum, chromium, nickel, and aluminum, and a single cleaning method will not be able to adequately address the demands. We have studied the RF plasma cleaning of optical elements. After the argon/oxygen or argon/hydrogen gas mixture was injected into the chamber, glow discharge was carried out, and the carbon on the surface of the inert metal-coated optical element and oxidation-prone metal-coated optical element was removed by the oxidation or reduction reaction of radicals. In order to optimize the discharge parameters, it utilizes a differential mass spectrometry system and an optical emission spectrometer to monitor the cleaning process. This paper introduces the principles of the two cleaning methods as well as our existing cleaning device.  
poster icon Poster TUPYP032 [2.493 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP032  
About • Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 19 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP034
 A New Design of X-ray White Beam Profile Monitor for HEPS Beamlines  
 
  • Q.H. Duan, Q. Han, Z. Li, S. Liu, Z.Y. Yue, Q. Zhang
    IHEP, People’s Republic of China
  
  The development of x-ray white beam profile monitor is to realize the visual detection of beam contour and position under the condition of high energy and high heat load of HEPS fourth-generation light source. The device includes a electric drive system, an imaging system, and a copper-cooled CVD diamond monitor. SPECTRA and ANSYS were used to verify the mechanism temperature reliability when monitor being used in different HEPS beamlines at current of 200 mA. At the same time, the functional verification of the experimental prototype was carried out on the 3W1 high energy test beamline of BSRF, white beam fluorescence images were successfully obtained. During the test of Multilayer Monochromator for Structural Dvnamics Beamline(HEPS), the change images of white and monochromatic beam profiles and curve of intensity distribution during crystal adjustment are successfully obtained, which verificates the processing function of the monitor for beam profile and intensity distribution.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP035
 Mechanical Design of Compensation Device Using 1D CRL for Wavefront Deformation at HEPS  
 
  • X.H. Kuang, Z.R. Ren, W.F. Sheng, S. Tang
    IHEP, People’s Republic of China
  
  Compensating devices using 1D CRL have been used in many beamlines at HEPS. Due to the deformations caused by the thermal and clamping of the monochromator, the beamline optical focus will be shifted in the horizontal or vertical direction. Then compensation device needs to be added to make the focus align with the sample position. The correction tablet uses 1D compound refractive lens (CRL), which is fixed on a customized five-dimensional manipulator. According to different errors corresponding to different energies, the correction tablet needs to rotate at different angles. If only the rotation angle cannot meet the requirements, a more appropriate CRL should be chose by switching, Generally in the horizontal direction through a large stroke to achieve. When cooling is required, the clamping block of the 1D CRL is made of Cu material with good heat transfer effect, and the displacement compensation of rotation is carried out by copper foil.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP036
 Mechanical Design of Water-cooled Slits System at HEPS  
 
  • Z. Li, Q.H. Duan, L. Gao, Q. Han, Y.X. Ma, W.F. Sheng, Z.Y. Yue
    IHEP, People’s Republic of China
  
  The fourth generation synchrotron radiation light source currently under construction in China has the characteristics of high energy and high brightness. High Energy Photon Source(HEPS) can be used in many basic and engineering research fields, so different spot sizes are modulated for different research needs. This design is a rotary water-cooled white beam slit system, which mainly includes absorber parts and driving mechanism. On the premise of ensuring the integrity of the absorber, the aperture is processed inside the absorber, and the absorber is rotated by the driving mechanism, so as to realize the adjustment of the aperture of the slit. The system has the characteristics of compact structure, high yield and simple processing, and can achieve the same performance index while saving time and space costs. At present, the function of the experimental prototype has been verified on the 3W1 high energy test beam line of BSRF, and the spot size can be adjusted.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP037 Mechanical Design of Multilayer Kirkpatrick-Baez (KB) Mirror System for Structural Dynamics Beamline (SDB) at High Energy Photon Source (HEPS) 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 icon 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP038 A Design of an X-Ray Pink Beam Integrated Shutter for HEPS 85
 
  • S. Liu, Q. Han, G. Mo, A.Y. Zhou
    IHEP, People’s Republic of China
  
  The main function of the shutter is to accurately control the exposure time of the sample so that the sample as well as the detector can be protected. In order to cover the high thermal load and high energy working environment, we designed an integrated shutter device. The device includes a thermal absorber shutter, a piezoelectric ceramic fast shutter, a vacuum chamber and an adjustable height base. Firstly SPECTRA and ANSYS were used to verify the device’s institutional temperature reliability at a thermal power density of 64W/mm2. In addition, the device is suitable for both monochromatic and pink light operation with a horizontal pitch of 15mm. The device is also compatible with both vacuum and atmospheric working environments, and the recollimation of the device is not necessary when switching modes. Finally, the thermal absorber shutter is also able to function as a beam profile monitor, and the position of the spot can be monitored through a viewing window on the cavity.  
poster icon Poster TUPYP038 [0.781 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP038  
About • Received ※ 08 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP039 A Design of an X-ray Monochromatic Adjustable Slit for HEPS Beamlines 88
 
  • S. Liu, Q.H. Duan, Q. Han, Z. Li, J.L. Yang, Z.Y. Yue, Q. Zhang, Z.B. Zhang
    IHEP, People’s Republic of China
  
  The monochromatic slit is a commonly used device in HEPS beamlines. It can limit the synchrotron beam-spot within a desired size required by the downstream optical equipment. In addition, the four-blade structure is the most widely used form of slit. The slit with this form usually consists of a pair or two parallel tungsten carbide blades. With their edges close to each other, a slit can be formed, and the size of which can be controlled by micromechanical guides. This structure is very suitable for the case of large beamsize. In this work, we have designed a monochromatic slit based on the four-blade form for BF-beamline in HEPS. It can be used in ultra-high vacuum, high luminous flux working environment. The maximum opening range is up to 30mm*10mm (H*V), while it can allow a white beam of 136mm*24mm (H*V) to pass through. Furthermore, we adopted a point to surface contact design, which can effectively avoid the over-constraint problem between two guide rails.  
poster icon Poster TUPYP039 [0.457 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP039  
About • Received ※ 10 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP040
 Experimental Setup Design of Hard X-ray Coherent Scattering (HXCS) Beamline at HEPS  
 
  • Z.N. Ou, R.Y. Liao, S. Tang, X. Wang, H.H. Yu, L. Zhou
    IHEP, People’s Republic of China
  
  The HXCS is a dedicated coherent beamline of the High Energy Photon Source (HEPS). The experimental setup of the endstation mainly includes two devices: CDI/WAXS XPCS and SAXS XPCS. To achieve high stability requirements, the CDI/WAXS XPCS device use a nano-focusing AKB mirrors system, which will focus hard x-rays to a focal spot as small as 100 nm with a small working distance of 64 mm. In the narrow working distance, AKB mirror chamber and sample chamber are designed as a unit but separated from the middle. And the device is designed with two sets of switchable sample table, in order to flexibly carry out four coherent techniques. Due to high stability, the CDI/WAXS XPCS device is stringent designed for high stiffness, high temperature stability and metrology. Besides, the other important equipments of the beamline include a 1.5m WAXS tube and a 14m SAXS tube. For high-resolution applications, the WAXS tube can be rotated around the sample in the horizontal and vertical plane by 45°and the SAXS tube can adjust distance and angulation. At present, the whole experimental setup is designed according to the fine mechanical design which can meet the experimental requirements.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP041
 Design for Harmonic Suppression Mirrors Mechanical System with X-Ray Height Compensation Function at HEPS  
 
  • Z.R. Ren, M. Li, W.F. Sheng, S. Tang, L.R. Zheng
    IHEP, People’s Republic of China
  
  In view of the fact that the Harmonic Suppression Mirrors (HSMs) mechanical system under the fast scanning mode of the X-ray Absorption Spectroscopy Beamline (XAS Beamline) of High Energy Photon Source (HEPS) needs to have a X-ray height compensation function in addition to suppressing high harmonics. This paper introduces a high stability 9-axis HSMs mechanical system, which has a basic 5-DOF adjustment, and the relative position relationship between the two mirrors is adjustable. By changing the center distance between the two mirrors, the gap between the two mirrors, and adjusting the parallelism of the two mirrors, the goal of compensating the output X-ray height difference of the upstream Channel Cut Monochromator is achieved. The vacuum machinery volume of the entire HSMs mechanical system is relatively large, which reaches 1766mm. Movement travel of the second mirrors reaches 620mm. Currently, the vacuum machinery has been processed and further testing is being carried out.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP042
 Vacuum System Design of HEPS Beamlines  
 
  • Y. Tian, Q. Han, H. Shi
    IHEP, People’s Republic of China
  
  Vacuum system is the basic component in High Energy Photon Source(HEPS) beamlines. Only when the optical devices in beamlines are operated in a high vacuum or even ultra-high vacuum environment, can avoid the carbon deposition of the optical mirror which might result in the optical reflectivity reduction, and reduce the absorption of synchrotron radiation light by residual gas. The purpose of vacuum system design is to obtain and maintain a reasonable vacuum degree to ensure the stable operation of the beamline. This article introduces the vacuum system design in HEPS beamlines from the aspects of pressure distribution calculation, vacuum material selection, vacuum acquisition, measurement equipment selection, vacuum system gas desorption analysis and vacuum equipment layout. The key point lies in using Mlflow software based on test particle Monte Carlo method to analyze and simulate the static pressure distribution which is without beam throughout the vacuum system and the dynamic pressure distribution after beam cleaning.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP043 The Design of Test Beamline at HEPS 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP044
 Development of Typical Nano-KB/AKB Mirrors Mechanical System at HEPS  
 
  • H.H. Yu, M. Li, R.Y. Liao, W.F. Sheng, S. Tang, R.Z. Xu
    IHEP, People’s Republic of China
  • Y. Li
    BUAA, Beijing, People’s Republic of China
  • Y. Li
    Rejected, -, Tanzania
  • S. Tang, H.H. Yu
    UCAS, Beijing, People’s Republic of China
  
  Nano-KB/AKB mirrors are used to focus spot size to the nanometer level in main performance beamlines at HEPS, including the Hard X-ray Nanoprobe Multimodal Imaging Beamline(NAMI Beamline), the Hard X-ray Coherent Scattering Beamline(HXCS Beamline), and X-ray Absorption Spectroscopy Beamline(XAS Beamline), etc. For the typical Nano-KB/AKB mirrors mechanical system, a common design of the mounting and clamping mechanisms and the adjustment mechanisms is presented. There are also the key components of the Nano-KB/AKB mirrors mechanical system. Currently, through the design and optimisation of the mechanical structure and the corresponding finite element analysis(FEA), the first Nano-KB mirrors mechanical system at HEPS has been fabricated, and the large travel range, high resolution and high stability adjustments mechanisms are achieved, the slope error of the Nano-KB mirrors is well ensured simultaneously, and the test results are consistent with the design.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP045 Usability Study to Qualify a Maintenance Robotic System for Large Scale Experimental Facility 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP046
 Design and Test of Valve Box for HFRS Cryogenic Distribution System  
 
  • Y. Cheng, X.X. Ding
    Lanzhou University of Technology, Lanzhou, People’s Republic of China
  • D.S. Ni, X.D. Wang, B.M. Wu, W. Wu, Q.G. Yao, L. Zhu
    IMP/CAS, Lanzhou, People’s Republic of China
  
  High Intensity heavy ion Accelerator Facility (HIAF) is a major scientific research facility proposed by the Institute of Modern Physics, Chinese Academy of Sciences. Among them, HIAF Fragmentation Separator (HFRS) is an important radioactive beamline on this device. In order to cooperate with the superconducting magnet to operate stably in the 4.5K environment, there are 24 cryostats on the entire beamline, and each cryostat is equipped with a distribution valve box, which is installed in the cryogenic composite pipeline and the superconductor. It is used to modulate and deliver cryogenic fluid into the cryostat to cool the superconducting magnets. In addition¿there are one main valve box and two end valve boxes in cryogenic distribution system. The finite element analysis software ANSYS is used to simulate the deformation and stress distribution of the valve box in a vacuum environment. Using the bending structure to compensate for cold deformation, omitting the bellows, reducing the difficulty of the process, and improving reliability. A new type of support structure has been designed to reduce heat leakage. At the same time, the temperature distribution is simulated  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP047 Design of Liquid Injection Device for the Hard X-Ray Ultrafast Spectroscopy Experiment Station 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 icon 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP048 A High Repetition Rate Free-electron Laser Shutter System 101
 
  • J.C. Gu, H. Jiang, Y. Tong, Z. Wang
    ShanghaiTech University, Shanghai, People’s Republic of China
  
  The Shanghai High repetition rate XFEL and Extreme light facility (SHINE) is the first high repetition rate XFEL in China. It is a powerful tool for scientific research. However, the high repetition rate XFEL has a high peak power and average power. The high peak power can damage optics and devices in the optical path in femtosecond. And the high average power will cause the distortion of optics. Consequently, it becomes crucial to protect optics and devices in the optical path. This shutter system is designed to protect the diagnostics and avoid thermal distortion and thermal damage. It can control the number of pulses and average power on the diagnostics. The time window of shutter can be as small as 10 ms. It has can absorb most of FEL power.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP048  
About • Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 January 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP050 Design and Calculation of Vacuum System for WALS Storage Ring 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP051 Progress of WALS NEG Coating Equipment and Technology 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP052
 An Application of Plant Ramification Structures to the Biomimetic Design of Girders for the Synchrotron Radiation Accelerator Storage Ring  
 
  • X. Cao, L. Lu, W. Ma, S. Tang, C.Y.B. Xing, Z. Yang, L.P. Zou
    Sun Yat-sen University, Zhuhai, Guangdong, People’s Republic of China
  • Z. Yang
    Institute of Advanced Science Facilities, Shenzhen, People’s Republic of China
  
  Funding: Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, 519082 Zhuhai, China Institute of Advanced Science Facilities, 518107 Shenzhen, China
In order to ensure the high stability and avoid the ground vibration amplification, it is necessary to improve the 1st eigenfrequency of the Magnet-Girder Assembly in the 4th Generation Light Source storage ring. At present, it is mainly parameters such as thickness, spacing, and height of girders are adjusted"*". In the natural world, plants have evolved highly ingenious support structures after billions of years of experimentation with load-bearing topological structures. By observing the growth process of plant ramifications, a simple and direct topology method is proposed. An algorithm based on MATLAB and APDL is used to iteratively optimize the mass configuration of the stiffeners, resulting in a novel bio-inspired girder. It introduces a growth and branching model, where growth and branching are vigorous in high-stress areas and slow down or even atrophy in low-stress areas. In this paper, we will investigate the effect of volume increase rates, branching thresholds, and other parameters, including the position and quantity of stiffener sprouting points, the growing process, support conditions, and the shape of the girder, on stiffener growth and the 1st eigenfrequency.
"*"Andresen S. Impact of Different Components and Boundary Conditions on the Eigenfrequencies of a Magnet¿Girder Assembly[J/OL]. Instruments, 2021, 5(3): 29. 		 
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP053 Current Status of Vibration Monitoring System at SOLARIS 111
 
  • M. Piszak
    NSRC SOLARIS, Kraków, Poland
  
  Solaris synchrotron radiation centre, despite being relatively new facility, began expansion of its experimental hall in 2022 in order to accommodate new beamlines. The construction works were carried out along with regular accelerators and beamlines operation and generated high levels of vibration. To better understand the influence of vibrations on electron and x-ray beams¿ stability, an accelerometer-based monitoring system was designed and implemented. The system consists of a triaxial measurement point equipped with seismic accelerometers located on bending magnet inside storage ring and a central signal conditioning and acquisition point. The results of long-term vibration data collection and analysis will be presented along with plans for the future system expansion.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP053  
About • Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP054 Mechanical Design of the Beam Gas Ionisation (BGI) Beam Profile Monitor for CERN Super Proton Synchrotron 114
 
  • M.T. Ramos Garcia, W. Andreazza, P. Bestmann, H. Bursali, N.S. Chritin, W. Devauchelle, A. Harrison, G. Khatri, M. McLean, C. Pasquino, F. Sanda, P. Schwarz, J.W. Storey, R. Veness, W. Vollenberg, C. Vollinger
    CERN, Meyrin, Switzerland
  
  The Beam Gas Ionisation (BGI) instrument of the Proton Synchrotron (PS), presently installed and operational, has been re-designed for the Super Proton Synchrotron (SPS), the following machine along the Large Hadron Collider (LHC) injector chain at CERN accelerator complex. Using the same detection technology, Timepix3, the SPS-BGI infers the beam profile from the electrons created by the ionisation of rest gas molecules and accelerated onto an imaging detector. This measurement method will allow for continuous, non-destructive beam size measurement in the SPS. In view of the upgrade, the design has been simplified and validated for integration, radio-frequency & impedance, high-voltage and ultra-high vacuum compatibility.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP054  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 14 November 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP055 Application of QXAFS in the Medium-Energy X-ray Absorption Spectroscopy 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 icon 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
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)