WEPPP —  Poster Session   (08-Nov-23   16:10—17:30)
Chair: M. Dommach, EuXFEL, Schenefeld, Germany
Paper Title Page
WEPPP002 The Status of the High-Dynamic DCM-Lite for Sirius/LNLS 154
 
  • G.S. de Albuquerque, J.P.S. Furtado, N.P. Hara, M. Saveri Silva, T.R. Silva Soares
    LNLS, Campinas, Brazil
  
  Funding: Ministry of Science, Technology and Innovation (MCTI)
Two new High-Dynamics Double Crystal Monochromators (HD-DCM-Lite) are under installation for QUATI (superbend) and SAPUCAIA (undulator) beamlines at Sirius. The HD-DCM-Lite portrays an updated version of Sirius LNLS HD-DCMs not only in terms of being a lighter equipment for sinusoidal scans speeds with even higher stability goals, but also bringing forward greater robustness for Sirius monochromators projects. It takes advantage of the experience gained from assembly and operation of the previous versions during the last years considering several work fronts, from the mechanics of the bench and cooling systems to FMEA, alignment procedures and control upgrades. In this work those challenges are depicted, and first offline results regarding thermal and dynamical aspects are presented. 		 
poster icon Poster WEPPP002 [7.970 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP002  
About • Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 11 December 2023
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WEPPP004 High Heat Load Transfocator for the New ID14 ESRF Beamline 158
 
  • L. Eybert, P. Brumund, J. Reyes-Herrera
    ESRF, Grenoble, France
  
  X ray refractive lenses (CRL) are powerful in-line optics for focusing x-rays. They offer many advantages such as compactness, a comfortable working distance, robustness, and are suitable for use in a wide range of energy. In the scope of the new nuclear resonance ID14 beamline at ESRF, a new transfocator was developed. This transfocator benefits from the previous experience of ESRF’s transfocators to withstand the high power densities (645W/mm2) and total power (405W) generated by the future CPMU18 and the high positioning tolerance required = <± 20µm within the same LCR assembly and between different assemblies. A thermal load analysis was carried out to optimize the cooling design for both 1D and 2D Beryllium lenses unit assembly. The tight alignment specifications was achieved thanks a good machining of both lenses unit mechanical assembly and reference V shaped rail. High positioning repeatability of CRLs actuator is assured by an optimized flexor and a good alignment procedure. The transfocator vessel is installed on a granite and a 4-DOF alignment table.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP004  
About • Received ※ 27 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 January 2024
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WEPPP006
 Setup for a Combined XEOL and XAFS Spectroscopy Measurement at the X-Ray Absorption Spectroscopy Beamline P65 of Petra III  
 
  • R. Biller, E. Welter
    DESY, Hamburg, Germany
  • S. Levcenco, C.S. Schnohr
    Leipzig University, Felix Bloch Institute for Solid State Physics, Leipzig, Germany
  
  A recently designed setup to perform steady-state X-ray excited optical luminescence (XEOL) spectroscopy and simultaneous X-ray absorption fine structure (XAFS) characterization at the beamline P65 of PETRA III is described. The so-named XEOL setup is equipped with a customized Helium-flow cryostat and a state of-the-art optical detection system, which covers a wide wavelength range from near-infrared (NIR), visible (VIS) and ultraviolet (UV) wavelength ranges. The cryostats’ and vacuum chambers’ design required special layouts and design due to certain geometrical constraints which was challenging to realize. The result of the now implemented assembly make two measuring methods simultaneously possible. First case studies show the experiments¿ success. The main advantage of the elaborated setup is that it does not require modification of either the sample alignment or the basic instruments at the beamline P65. The XAFS-XEOL setup, covering wide spectral and temperature ranges, is available for the user experiments and we expect that future studies will provide valuable information about fine structures of a broad range of materials.  
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WEPPP008
 Flexible X-Ray Focusing Using CRL Transfocators for GI-SAXS/WAXS Experiments  
 
  • J.R. Rubeck, A. Chumakov, M. Schwartzkopf
    DESY, Hamburg, Germany
  
  P03 operates a micro- and a nanofocus endstation both capable of transmission as well as grazing-incidence X-ray scattering experiments [1,2,3]. The beam sizes range from typically 22 x 13 ¿m2 to 350 x 250 nm². Common, unique features of the different focusing schemes are the exceptional long focal distance, allowing for a variety of advanced in situ and operando sample environments [1]. The newly commissioned CRL3-system consists of two binary stacks of one-dimensional (1D) BeCRL mounted on an in-vacuum lens-exchanger with two train units, piezo-driven motors and a hexapod for generating a round-shaped microfocus beam with increased flux at 600 mm focal distance. An additional condenser system CRL4 for beam parallelization prior to focusing systems will increase the flux at both endstations. CRL4 consist of two Smarpods in-vacuum stages, both equipped with a stepped cascade of 1D lenses each for decoupled horizontal and vertical focusing. We will present the different focusing schemes incl. projected performances as well asthe current status of both new CRL-stations and technical challenges, e.g. space constraints, precise positioning, stability
[1] A. Buffet et al., J. Synchr. Rad. 19 (2012), 647.
[2] C. Krywka et al., J. Appl. Cryst. 45 (2012), 85.
[3] G. Santoro et al., Rev. Sci. Instr. 85 (2014), 043901.
 		 
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WEPPP009 POLAR Synchrotron Diffractometer 161
 
  • G. Olea, N. Huber, J. Zeeb
    HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany
  
  A new product for research purposes aiming to work in a synchrotron facility after its upgradation (APS-U) has been recently developed. Based on specific beam characteristics (emittance, coherence, variable polarization) and several X-ray diffraction (XRD) techniques applied (resonant, reflectivity) on single crystal and thin films under extreme conditions (temperature, pressure), the product is expected to fast progress the investigations of magnetic materials at nanoscale level. The dedicated machine (diffractometer) will be in one of the newly constructed experimental enclosure (G) of a main beamline (POLAR) in the 4th (ID-4) sector, serving a large spectrum of investigations for Magnetic Material (MM) group. POLAR-Dm was conceived on a traditional 6C (C-circles) geometry, maintaining the common kinematic structural principle of its family. With the addition of several interchangeable positioning devices (e.g., Euler cradle, air bearings stages, etc) the system is expanding the spectrum of possible investigations, maintaining the precision of new setups. The kinematic, design and precision concepts applied, together with the obtained test results are all in detail presented.
* J. Strempfer et al., Possibilities at Polar beamline with APS-U, 14th Int. Conf. SRI2021, J. Phys., 2380 (2022) 012038
** HUBER Diffractionstechnik GmbH&Co.KG, 2023, www.xhuber.com
 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP009  
About • Received ※ 02 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 28 February 2024
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WEPPP010 The MID Instrument of European XFEL: Upgrades and Experimental Setups 164
 
  • G. Ansaldi, T. Andersen, A. Bartmann, U. Boesenberg, J. Hallmann, A. Madsen, J. Möller, J.-E. Pudell, A. Rodriguez-Fernandez, A. Schmidt, R.A. Shayduk, K. Sukharnikov, J. Wonhyuk, A. Zozulya
    EuXFEL, Schenefeld, Germany
  
  It is given an insight on examples of Upgrades currently under development at the Material Imaging and Dynamics (MID) Instrument of the European XFEL GmbH [1], [2] in the X-ray Scattering System (XSIS) [3]: - The Multi-Environment Setups for a Multi-Detector System (MDS2) are the Setups designed around an additional detector chamber (MDS) to be used at the same time of the AGIPD detector [4], allowing it to cover simultaneously WAXS, SAXS and large field of view regions by using two area detectors, one close to the sample and a second one further away. - The Multi-Purpose Chamber 2 (MPC-2) represents the evolution of the current version and includes the upgraded design of both the exterior vessel and of some local optics assemblies in interior. Both these Upgrades will allow to improve the current MID Beamline performance capabilities and make entirely new experiments possible. - Reported are also Examples of some relevant Experimental Setups successfully designed and implemented going as well in the simultaneous multi-detector-use direction.  
poster icon Poster WEPPP010 [5.728 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP010  
About • Received ※ 10 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024
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WEPPP011
 Design and CNC Manufacturing of the Sample Holder for the Forward Scattering Fixed - Target (FFT) Chamber  
 
  • A.R. Reich, R. Carley, C. Deiter, J.T. Delitz, G. Mercurio, A. Scherz, M. Teichmann
    EuXFEL, Schenefeld, Germany
  
  The Forward- scattering Fixed-Target chamber (FFT) hosts the coherent diffraction imaging experiments, which are the baseline experimental studies to be performed at the Spectrosopy and Coherent Scattering (SCS) instrument of the European XFEL. The sample environment allows for changing samples without breaking the vacuum. This is realized by a fast sample changer system connected to a load lock. With different and customized sample holders it is possible to achieve user specific requirements. This poster describes the process of converting a Computer Aided Design (CAD) file into a Computer Aided Manufacturing (CAM) file, which in turn is converted into Numerical Control (NC) code. The sample holder is manufactured on an adapted CNC machine, with a vacuum table and specially selected tools. In addition, all important mechanical and vacuum boundary conditions are explained. Due to the adapted processes it is possible to react immediately to changes during an experimental campaign.  
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WEPPP012 Multiple Detector Stage at the MID Instrument of European XFEL 168
 
  • A. Schmidt, G. Ansaldi, A. Bartmann, U. Boesenberg, J. Hallmann, A. Madsen, J. Möller, K. Sukharnikov
    EuXFEL, Schenefeld, Germany
  
  The Multiple Detector Stage (MDS) is an ancillary detector setup for the Materials Imaging and Dynamics (MID) instrument at the European X-Ray Free-Electron Laser Facility (EuXFEL). It is developed to improve the current capabilities concerning X-ray detection and make entirely new experiments possible. A unique feature of the MID instrument is the large flexibility in positioning of the AGIPD detector relative to the sample. This enables a large variety of instrument configurations ranging from small-angle (SAXS) to wide-angle (WAXS) X-ray scattering setups. A recurrent request from the users, which is currently not enabled, is the option of simultaneously recording both wide- and the small angle scattering by using two area detectors. The aim of developing MDS is to provide this missing capability at MID so that SAXS and WAXS experiments can be performed in parallel. The MDS will not be installed permanently at the instrument but only on request to provide as much flexibility as possible. In this article, the background and status of the MDS project is described in detail.  
poster icon Poster WEPPP012 [1.731 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP012  
About • Received ※ 10 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 23 March 2024
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WEPPP013 Mechanical Design and Integration of the SXP Scientific Instrument at the European XFEL 172
 
  • V.V. Vardanyan, D.G. Doblas-Jimenez, M. Dommach, P.G. Grychtol, M. Izquierdo, N. Kohlstrunk, D. La Civita, S. Molodtsov, O.J. Ohnesorge, T.E. Tikhodeeva, M. Vannoni
    EuXFEL, Schenefeld, Germany
  • J. Buck, R.K. Rossnagel
    DESY, Hamburg, Germany
  • S.G. Schönhense
    Johannes Gutenberg University Mainz, Institut für Physik, Mainz, Germany
  • T.S. Thiess
    IEAP, Kiel, Germany
  
  The European XFEL provides femtosecond X-ray pulses with a MHz repetition rate in an extended photon energy range from 0.3 to 30 keV. Soft X-rays between 0.3 and 3 keV are produced in the SASE3 undulator system, enabling both spectroscopy and coherent diffraction imaging of atoms, molecules, clusters, ions and solids. The high repetition rate opens the possibility to perform femtosecond time-resolved photoelectron spectroscopy (TR-XPES) on solids. This technique allows the simultaneous understanding of the evolution of the electronic, chemical and atomic structure of solids upon an ultrafast excitation. The realization with soft X-rays requires the use of MHz FELs. In this contribution, we present the mechanical design and experimental realization of the SXP instrument. The main technical developments of the instrument components and the TR-XPES experimental setup are described.  
poster icon Poster WEPPP013 [1.253 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP013  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 12 March 2024
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WEPPP014
 Research on High Quality Channel-Cut Crystal Optics for High Energy Photon Source  
 
  • Z. Hong, Q.S. Diao, M. Li, H. Lian
    IHEP, Beijing, People’s Republic of China
  • M. Li
    University of Chinese Academy of Sciences, Beijing, People’s Republic of China
  
  Funding: 1 National Natural Science Foundation of China (NSFC; Proposal No. 12105310). 2 The High Energy Photon Source project, a major national science and technology infrastructure in China.
In this paper, a machining scheme of magnetically controlled small tool was proposed, which gets rid of the limitation of the power system and transmission system, and realized the free machining of channel-cut crystal with narrow space, a high quality channel-cut crystal with high wavefront maintenance and high transmission efficiency in a large size range was obtained. The results of offline characterization showed that: The roughness of inner surfaces reached 0.6nm RMS; Microstructure analysis show that the perfect lattice substrate was only covered 2.5nm thickness uniform SiO₂ layer, and there was no uneven bending of the oxide layer caused byμstress concentration. The results of online tests showed that: the Darwin widths of the channel-cut crystal processed by MC-CMP were consistent with the theoretical values, the two diffraction reflectivity rate of the crystal reached 85.1%, very close to the theoretical limit of 88.3%. The morphology of channel-cut crystal treated by MC-CMP technology was uniform, scratches and spot defects were eliminated completely. The wavefront equivalent crystal profile error of the two diffraction reached 130nrad RMS with 5 mm dimension. 		 
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WEPPP015 Progress of Front Ends at HEPS 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 icon 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 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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WEPPP017
 Radiation Shielding Design for Huts of HEPS Beamlines  
 
  • Q.Y. Guo
    IHEP, People’s Republic of China
  
  High Energy Photon Source (HEPS) belongs to the fourth generation synchrotron radiation device. The electron beam energy of storage ring is 6 GeV, and the current intensity is 200 mA. After completion, it will be the first high-energy photon source in China. HEPS can provide X-rays with energy up to 300keV and has the capacity to build over 80 high-performance beamlines. The maximum energy of the HEPS beamline reaches 300KeV, which can construct more than 80 high-performance beamlines. Harmful radiation is inevitably generated, which becomes a direct source of radiation dose for workers during the operation and maintenance. Therefore, it is necessary to adopt a comprehensive shielding method of hut to contain harmful radiation. In this paper, the first step is to standardize the huts and analyze the types of radiation source terms. Secondly, the source term distribution and radiation dose attenuation inside the wall were simulated using FLKUA and STAC8. Finally, the shielding design thickness of the side walls, roof, and back walls of huts were given.  
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WEPPP018
 Water-cooled Tungsten Bremsstrahlung Collimator with Adjustable Height for Adapting the Offset of Beamline  
 
  • Z.Q. Gao, Q. Han
    IHEP, People’s Republic of China
  
  Bremsstrahlung collimator is a device located in HPES(High Energy Photon Source) beamline station. It is used to completely block the possible line of sight of the radiation and to properly collimate the bremsstrahlung radiation so that it has a defined opening angle at collimator exit. Because of the application in vacuum and with the aid of bremsstrahlung ray tracing a tungsten block with transverse dimension 200 millimeters is used as the bremsstrahlung stop. In order to adapt the vertically beam offset caused by monochromator, a lifting mechanism which uses stepper motor as driving part is designed to accomplish the up and down movement of the tungsten block. To meet the white light mode with high power density of the light beam, which might result in a high-heat-load on the tungsten block surface after the interaction between synchrotron radiation and block, a water-cooled structure made of oxygen-free copper rod with inlet and outlet water-cooling channels is assembled in front of the tungsten block. Thus, contributing to heat dissipation of the whole structure.  
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WEPPP019 Coating Removal of Silicon-Based Mirror in Synchrotron Radiation by Soluble Underlayers 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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WEPPP020
 A Photon Shutter with a Translational Switching Mechanism at HEPS  
 
  • P. Luo, Y.X. Ma, H. Shi, H.Y. Wang
    IHEP, People’s Republic of China
  
  Currently under construction on High Energy Photon Source (HEPS) is a 6GeV at 200mA¿4th Generation Synchrotron Light Source in Beijing. In order to meet all experimental light requirements for the three types of insertion devices of the hard X-ray imaging beamline at HEPS, a photon shutter that considers both large optical aperture and high heat load has been designed for the beamline Front-End. By designing a segmented surface with different grazing incidence angles, the power density of the incident surface irradiation is effectively reduced, while the length of the absorber is effectively shortened. The photon shutter can switch between open and closed states with a translational switching mechanism through a cylinder and a horizontal slide. And it can receive a maximum bam size of 25.2×22.7mm2 with handling a maximum total thermal power of up to 17.2kW and a peak power density of up to 652W/mm2. The structure of the photon shutter was introduced. Finally, the thermal analyses on the absorber of the photon shutter under various insertion operating modes was completed to verify its safety performance.  
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WEPPP021
 A Novel Design of Front End Slits for Hard X-Ray Imaging Beamline in High Energy Photon Source  
 
  • Y.X. Ma, P. Luo, H. Shi, H.Y. Wang
    IHEP, People’s Republic of China
  
  The Hard X-ray Imaging Beamline, being constructed at High Energy Photon Source (HEPS), will use three types of insertion devices in different operating modes, including CPMU, IAW73 and Mango Wiggler. Therefore, the front end of this beamline will receive synchrotron radiation with different distribution, including peak power density and receiving angle. To adequate diverse power distribution with a general geometry, a novel design of front end slits is development. Its absorbers are reasonably designed into segmented surfaces with different grazing angles according to the power density distribution of synchrotron radiation. Through this design, the slits can withstand thermal loads with a peak power density of 414kW/mrad2 and a maximum section of 30×30mm. Detailed thermal analyses of the absorbers under various operating modes are implemented to verify its safety performance under high heat loads. This new type of slits not only can adjust the aperture according to the needs of different operating modes, but also effectively shorten the length of the absorbers in the limited space of the front end.  
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WEPPP022
 Structural Design of the First Optics Enclosure (FOE) and Hutch for High Energy Photon Source  
 
  • H. Sun, H. Han, Q. Han
    IHEP, People’s Republic of China
  
  The High Energy Photon Source (HEPS) will construct 15 Beamlines in the first phase. In order to meet the needs of basic scientific research and protect the personal safety of laboratory personnel, each beamline is equipped with multiple radiation protection sheds, including FOE and Hutch. This paper introduces the overall structure of FOE and Hutch, including the basic radiation protection structure design between the wall panels of the shed, between the side walls and the roof, and the special radiation protection structure design for the relatively weak links of radiation protection such as the ground and wall corners. Additionally, the strengthening measures for FOE were introduced. At present, the structural design of the FOE and Hutch for all line stations has been completed, the installation of the FOE and Hutch for two line stations has been completed, and the installation of the FOE and Hutch for three line stations is currently underway.  
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WEPPP023
 Selection Calculation for the Absorbers of the Filter Equipment of HEPS  
 
  • H.Y. Wang, P. Luo, Y.X. Ma, H. Shi, J.L. Yang
    IHEP, People’s Republic of China
  
  The under-construction High Energy Photon Source is a fourth-generation synchrotron radiation source. It has two operation modes for its BF beamline station’s insertion devices and extremely high thermal loads. Therefore, it is necessary to use filters to modulate the energy and power of the beam. Filters can effectively absorb part of the thermal load in synchrotron radiation, thereby reducing the thermal load at downstream optical components or experimental samples. This article introduces the parameter design method of the absorbers in the filter, including material selection, thickness allocation, combination method of absorbers, and determination of the number of filter groups. A complete design process is obtained, and key factors affecting the use of filters are analyzed, providing a theoretical basis for the optimization design of the filter equipment. The filter designed using this method has been successfully applied to BF beamline of HEPS.  
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WEPPP024 Design of a Hard X-Ray Nanoprobe based on FZP 184
 
  • K.L. Liao, P.Y. Li, M.H. Song
    Jinan Hanjiang Opto-Electronics Technology Company Ltd., Jinan, People’s Republic of China
  • Q.L. He, P.P. Zhu
    IHEP, Beijing, People’s Republic of China
  • W.Q. Hua, P. Zhou
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  • L. Luo
    TUB, Beijing, People’s Republic of China
  
  A high-resolution hard X-ray nanoprobe (HXNP) based on Fresnel Zone plate (FZP) was designed. The HXNP relies on a compact, high stiffness, low heat dissipation and low vibration design philosophy and utilizes FZP as nanofocusing optics. The optical layout and overall mechanical design of the HXNP were introduced. Several important modules, such as probe module, sample module, interferometer module and vacuum chambers were discussed in detail.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP024  
About • Received ※ 02 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 12 April 2024
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WEPPP025 Application of CuCrZr in the Front-end of Shanghai Synchrotron Radiation Facility 187
 
  • S. Wu, Y. Li, J.N. Liu, J.W. Wang
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  
  Glidcop, oxygen free copper and other materials are mainly used in the Front-end of the Shanghai Synchrotron Radiation Facility(SSRF). CuCrZr material has high heat load capacity, high yield strength and tensile strength, good thermal conductivity and low vacuum outgassing rate. At present, it has been used as a heat sink material in the heat exchanger of nuclear reactors. In this paper, based on the previous process exploration, the Front-end absorber is made of CuCrZr material, and the technical scheme of integral processing of flange and absorber is adopted. The thermal stress and deformation of CuCrZr absorber are analyzed by finite element method, and the processing of CuCrZr absorber is completed, and it is applied to the SSRF BL04Ucanted front end. After a period of electron beam cleaning, vacuum and temperature tests were carried out under high thermal load power, and the characteristics of the material in practical use were analyzed, which proved that CuCrZr material can be used in SSRF under high heat load.  
poster icon Poster WEPPP025 [0.815 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP025  
About • Received ※ 01 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPPP026
 Sample Holders and In Situ Cell Construction  
 
  • M. Brzyski
    NSRC SOLARIS, Kraków, Poland
  
  In situ and operando spectroscopy became more popular in synchrotron beamline measurments. It contributes to develop beamline samble chambers. New technology like 3D printing provide more possibilites of manufacturing complex sample holders and cell assemblies.  
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WEPPP027
 Infrared Line Design  
 
  • M. Brzyski, P.N. Nowak
    NSRC SOLARIS, Kraków, Poland
  
  The SOLARIS synchrotron in Kraków is a third-generation synchrotron radiation source operating in the medium electron energy range. In 2019 a decision has been taken to design and build an infrared line. We designed the chamber supports and the mirror movement system. the line is at the stage of assembly and testing. We would like to present it  
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WEPPP028
 SOLARIS National Synchrotron Radiation Centre: The Infrastructure for Science and Industry  
 
  • P.N. Nowak
    NSRC SOLARIS, Kraków, Poland
  
  The SOLARIS synchrotron in Kraków is a third-generation synchrotron radiation source operating in the medium electron energy range. The first synchrotron light in SOLARIS was observed in 2016, while the first user experiments were performed in 2018. SOLARIS is expanding its activities, constantly developing experimental beamlines and complementary infrastructure such as cryo-electron microscopes. Research opportunities offered by SOLARIS, the only synchrotron in Central-Eastern Europe, allow for conducting unique scientific projects in fundamental research and applied sciences. It should be emphasized that access to the research infrastructure in SOLARIS is free of charge and provided based on the assessment of the beamtime applications by the international review panel. In the presentation, we will present the SOLARIS synchrotron project and available infrastructure, provide practical information on access to the infrastructure, and show examples of the research results obtained at the Centre by the Users.  
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WEPPP029 A Novel Flexible Design of the FaXToR End Station at ALBA 190
 
  • L.R.M. Ribó, N. González, L. Nikitina, A.P. Patera
    ALBA-CELLS, Cerdanyola del Vallès, Spain
  • A. Mittone
    ANL, Lemont, Illinois, USA
  
  FaXToR is one of the beamlines currently in con-struction and commissioning phase at ALBA, dedicat-ed to fast hard X-ray imaging. It will offer absorption and phase contrast imaging to users. Possible applica-tions of the beamline include 3D static and dynamic inspections in a wide range of applications. FaXToR aims to provide both white and monochromatic beam of maximum 36x14 mm (HxV) at sample position with a photon energy up to 70 keV. The optical layout of the beamline will tune the beam depending on the specific experimental conditions. Among the required optical elements, there is a multilayer monochromator, the cooled slits, the filtering elements, the intensity moni-tor and the beam absorption elements. The end station will be equipped with a rotary sample stage and a de-tector system table to accommodate a dual detection thus simultaneously scanning the samples with high spatial and temporal resolutions. On top of it, a motor-ized auxiliary table dedicated to complex sample envi-ronment or future upgrades will translate along the total table length, independently from the two detector system bridges. The design and construction process of the beamline will be presented.  
poster icon Poster WEPPP029 [0.851 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP029  
About • Received ※ 26 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 10 December 2023
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WEPPP030 MAX IV –- MicroMAX Detector Stage 193
 
  • S.M. Benedictsson, M.A. Al-Najdawi, O. Aurelius, G. Felcsuti, J. Lidón-Simon, M. Milas, T. Ursby
    MAX IV Laboratory, Lund University, Lund, Sweden
  
  Funding: "Funded by Novo Nordisk Fonden for the MicroMAX project, grant number NNF17CC0030666"
The MicroMAX beamline at MAX IV Laboratory will employ two detectors to be used independently and move along the beam depending on the diffraction target resolution, starting close to the sample hanging partially over the sample table. The X-ray beam can be deflected by Kirkpatrick-Baez (KB) mirrors in the horizontal and vertical directions or pass undeflected. The MAX IV Design office designed a detector stage as an in-house project based on the ALBA table skin concept [1] to switch between the two detectors and accurately position the selected detector, either with or without the KB mirrors. To achieve stability and precision during translations, a large granite block is used, as well as preloaded linear and radial guides, and preloaded ball screws with stepper motors and, in most cases, a gear box. Flexures are used to allow linear motion’s pitch and yaw angles. The various motions are layered so that alignment to the beam axis can be done first, and then sample-to-detector distance can be adjusted independently. A Finite Element Analysis (FEA) were performed to achieve a stable design and measurements of resonance frequencies on the finalized stage were done to verify it.
* Colldelram C., Rudget C., Nikitina L. October 2011. ALBA XALOC beamline diffractometer table skin concept design. Diamond Light Source Proceedings. 		 
poster icon Poster WEPPP030 [58.619 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP030  
About • Received ※ 25 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 January 2024
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WEPPP032 Photon Slits Prototype for High Beam Power Using Rotational Motions 196
 
  • X. Liu, W. Cheng, L. Hudson, H. Patel, A.C. Walters
    DLS, Oxfordshire, United Kingdom
  
  A new slits prototype utilising a rotatable oxygen-free high thermal conductivity (OFHC) copper block to absorb high heat load is developed for the Diamond-II upgrade. The slits will be used at front end of Diamond I13 X-ray Imaging and Coherence beamline which has two canted beamline branches. Required by the beamline optics, the front end slits function as virtual sources for the 250 meters long beamline. Working for the dual beam geometry, these specialised slits can vary the size of one x-ray beam with rotational motions while allowing the second beam to pass through unaffected. The rotational operations of the slits are achieved by an innovative commercial flex pivot and a unique in-house designed pivoting flexure.  
poster icon Poster WEPPP032 [1.377 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP032  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 February 2024
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WEPPP033
 Commercial Diamond X-Ray Lenses: Current Status  
 
  • S.P. Antipov
    PALM Scientific, Naperville, Illinois, USA
  
  Next-generation light sources necessitate the use of x-ray optical components capable of handling high power densities. Diamond, with its exceptional thermal and mechanical properties, is an ideal material for refractive focusing optics. Polished diamond x-ray lenses exhibit minimal background scattering. Over the past several years, we have been engaged in the development of a production process for x-ray refractive diamond lenses. Simultaneously, numerous other research groups have been pursuing variations of this task. Recently, we have entered the commercial market, offering diamond lenses for sale. Some geometries have undergone extensive testing, such as at the ESRF [1], demonstrating focusing performance comparable to industry-standard beryllium lenses. However, due to the complexity of the production process, certain geometries are still undergoing fabrication development and beamline testing. Our process utilizes high-precision femtosecond laser ablation in combination with the chemical mechanical polishing. This poster reviews our current progress, outline the parameter space for laser ablation and polishing of 1D and 2D lenses.
[1] R. Celestre, S. Antipov, E. Gomez, T. Zinn, R. Barrett, T. Roth, "Polished Diamond X-Ray Lenses", J. Synchrotron Rad., vol. 29, pp. 629-643, 2022. 		 
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WEPPP034 ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions 199
 
  • O. Traver Ramos, J.J. Casas, C. Colldelram, J.L. Frieiro, B. Molas, M. Quispepresenter, M. Sanchez
    ALBA-CELLS, Cerdanyola del Vallès, Spain
  
  The Thermal Contact Conductance (TCC) between two surfaces plays a very important role in the design of components in particle accelerators. The TCC depends on many variables such as surface finish, type of material, pressure, temperature, etc. As a general rule, the TCC comes from experimental results reported in the specialized literature. However, it is not always possible to find this information, especially if components are designed to operate in cryogenic and vacuum conditions, for this reason, assumptions are made that render results with high uncertainty. In this context, ALBA has designed an experimental set up to carry out axial heat flow steady state experiments for the evaluation of TCC under vacuum and cryogenic conditions. The minimum pressure achievable in the set up will be 1e-5 mbar while the temperature may vary between 80 and 300 K. The results will provide inputs to further optimize ALBA designs, including ALBA II, our ongoing fourth-generation synchrotron upgrade project. This paper describes the experimental setup, the thermal and mechanical design considerations and experimental validation tests.  
poster icon Poster WEPPP034 [0.616 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP034  
About • Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 05 April 2024
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WEPPP035 Design and Fluid Dynamics Study of a Recoverable Helium Sample Environment System for Optimal Data Quality in the New Microfocus MX Beamline at the ALBA Synchrotron Light Source 203
 
  • M. Quispe, J.J. Casas, C. Colldelram, D. Garriga, N. González, J. Juanhuix, J. Nicolàs, Y. Nikitin
    ALBA-CELLS, Cerdanyola del Vallès, Spain
  • M. Rabasa
    ESEIAAT, Terrassa, Spain
  
  XAIRA is the new microfocus MX beamline under construction at the ALBA Synchrotron Light Source. For its experiments, the quality will be optimized by enclosing all the end station elements, including the diffractometer in a helium chamber, so that the background due to air scattering is minimized and the beam is not attenuated in the low photon energy range, down to 4 keV. This novel type of chamber comes with new challenges from the point of view of stability control and operation in low pressure conditions while enabling the recovery of the consumed helium. In particular, it is planned to collect the helium gas with a purity > 99.5% and then to recover the gas at the ALBA Helium Liquefaction Plant. Besides, the circuit includes a dedicated branch to recirculate the helium used by the goniometer bearing at the diffractometer. This paper describes the fluid dynamic conceptual design of the Helium chamber and its gas circuit, as well as numerical results based on one-dimensional studies and Computational Fluid Dynamics (CFD).  
poster icon Poster WEPPP035 [1.794 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP035  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 June 2024
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WEPPP038
 Carbon Film for Copping the Electron Cloud and the Synchrotron-Radiation-Induced Heat Load  
 
  • Y.G. Wang
    IHEP, Beijing, People’s Republic of China
  
  Carbon material has a high reflectivity on the synchrotron radiation. It might be introduced into the accelerator to eliminate heat load in the cryogenic section induced by the high synchrotron radition. Coating carbon film on the accelerator wall has been confirmed a very effective method to mitigate the electron cloud. Here we will analyze the relatonship between the reflectivity and the secondary electron yield.  
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WEPPP039 Data Preprocessing Method of High-Frequency Sampling XAFS Spectra Collected in a Novel Combined SAXS/XRD/XAFS Technique 207
 
  • Y.P. Liu, Z.J. Chen, G. Mo, Z.H. Wu
    IHEP, Beijing, People’s Republic of China
  
  High-frequency (HF) sampling X-ray absorption fine structure (XAFS) spectra with a time-resolution of ~8s were collected in our newly developed synchrotron radiation small-angle X-ray scattering (SAXS)/X-ray diffraction (XRD)/XAFS combined technique. Restoring the HF XAFS spectrum which contains hundreds of thousands to millions of data points to a normal XAFS spectrum consisting of hundreds of data points is a critical step for the subsequent neighbor structure analysis. Herein, the data preprocessing method and procedure of HF XAFS spectra were proposed according to the absorption edge of the standard sample and the rotation angular velocity of the monochromator. This work is expected to facilitate the potential applications of HF XAFS spectra in a time-resolved SAXS/XRD/XAFS experiment.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP039  
About • Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 18 May 2024
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WEPPP040 Experimental Methods Based on Grazing Incidence at the 1W1A Beamline of the Beijing Synchrotron Radiation Facility and Its Application inn Characterizing the Condensed State Structure of Conjugated Po 210
 
  • Y. Chen
    IHEP, Beijing, People’s Republic of China
  • P. Cheng, H.X. Li
    Sichuan University, Chengdu, People’s Republic of China
  • Y.C. Han
    CIAC, Changchun, People’s Republic of China
  
  The diffuse scattering experimental station of BSRF uses the dual focused monochromatic X-ray provided by 1W1A beam line to carry out structural research on crystal and film materials. This experimental station can carry out high-resolution XRD, XRR, GIXRD, GIWAXS/GISAXS and other experimental methods. GIWAXS/GISAXS is an important method for characterizing the condensed structure of conjugated polymers. We have upgraded and optimized the grazing incidence experimental method of the experimental station, and developed a grazing incidence remote rapid sampling platform. Greatly reduces testing time and enables remote online testing operations for users. Subsequently, we further established in-situ steam treatment, in-situ thermal annealing, in-situ drip coating, in-situ spin coating, in-situ scraping coating, and GISAXS testing platforms, enriching the line station grazing incidence testing methods.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP040  
About • Received ※ 30 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024
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WEPPP041 The Joy of Vibration Mitigation 212
 
  • J.H. Kelly, S.G. Alcock, S.A. Beamish, D. Crivelli
    DLS, Oxfordshire, United Kingdom
  
  The decision was made to build a new Optics Metrology Lab at the Diamond Light Source in a location with 100 times higher floor velocity in the range 50-150Hz than the original location. This paper describes the successful engineering developments to mitigate this. The raft of measures included ‘skyhook¿ damping i.e. active damping using geophone velocity feedback, novel 2 stage passive vibration isolation and fundamental research into acoustic coupling of air conditioning noise. The new systems have been installed, the final performance tested and the optics scientists have been able to continue their sensitive measurements.  
poster icon Poster WEPPP041 [1.826 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP041  
About • Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 25 March 2024
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WEPPP042
 Application of Surface-Partially Nitrided High-Purity Ti as a Nonevaporable Getter for Synchrotron Radiation Beamline  
 
  • T. Kikuchi, K. Kataoka, K. Mase, H. Nitani, T. Ohigashi, H. Tanaka
    KEK, Tsukuba, Japan
  • K. Mase
    Sokendai, The Graduate University for Advanced Studies, Tsukuba, Japan
  • H. Nitani, T. Ohigashi
    Sokendai, Ibaraki, Japan
  • M. Ono, I. Yoshikawa, K. Yoshioka
    University of Tokyo, Kashiwa, Japan
  • T. Sakurai, N. Uezono
    Tsukuba University, Ibaraki, Japan
  
  Funding: This work was partly supported by KAKENHI (JP17K05067, JP19K05280, 22K04937) TIA-Kakehashi (TK20-026, TK21-046, TK22-053) and Takahashi Industrial Economic Research Foundation (08-003-172).
Nonevaporable getter (NEG) pumps are widely used in synchrotron radiation facilities because they are oil-free, vibration-free, space-saving, lightweight, and energy-saving. When a NEG thin film is deposited on the inner wall of a vacuum duct, the residual active gases are pumped after baking. Recently we have developed a new NEG thin film that was prepared by the following simple procedure, sublimation of high-purity Ti under UHV in the range of 10-7 to 10-8 Pa, followed by N₂ introduction.*,** We confirmed that partially nitrided high-purity Ti coating on inner surface of a vacuum vessel pumped H₂, H₂O, O₂ gases, and CO even after 30 cycles of pumping, baking at 185 °C for 6 hours, cooling down to room temperature, introduction of high-purity N₂, and exposure to air.** In the present study, we applied surface-partially nitrided high-purity Ti on the inner surface of the vacuum ducts in the upstream section of BL-12C in the Photon Factory 2.5 GeV ring and baked them at 250°C. Pressure in the section reached ultrahigh vacuum of 2.2×10-8 Pa without ion pumps after isolation from the turbomolecular pump with gate valve.
* T. Miyazawa et al., Vac. Surf. Sci. 61, 227 (2018).
** K. Mase, et al., MEDSI2020 Proceedings, TUPA01 (2021)
 		 
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WEPPP044 Development of High Power Density Photon Absorber for Super-B Sections in SSRF 215
 
  • Q. Tang, Y. Liu, Q.L. Zhang, Y.L. Zhao
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  • C. Jin
    SKY Technology Development Co., Ltd. Chinese Academy of Sciences, Shengyang, People’s Republic of China
  
  There are two symmetrical standard bend sections been updated to super-bend sections in the storage of Shanghai Synchrotron Radiation Facility(SSRF). Photon absorbers made up of CuCrZr were used for absorbing radiation with very high power density in the super-bend sections. Meanwhile, CuCrZr absorbers were also used as beam chamber and pump port for the lattice of super-bend section is very compacted. The absorbing surface was designed as serrate structure in order to diminish the power density. CuCrZr was cold-forged before machining to enhance its strength, thermal conductivity and hardness. Friction welding is adopted for absorber fabrication to avoid the material properties of absorber deterioration. Rectangle flanges of absorbers were designed as step rather than knifer for vacuum seal. These high power density photon absorbers have been installed on the storage ring, both pressure and temperature being in accordance with design anticipation in the case of beam of 240 mA running.  
poster icon Poster WEPPP044 [1.597 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP044  
About • Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 02 April 2024
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WEPPP045 Particle-Free Engineering in SHINE Superconducting Linac Vacuum System 219
 
  • Y.L. Zhao, Y. Liu, Y.F. Liu, Q. Tang, L. Yin
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  
  The Shanghai high-repetition-rate XFEL and extreme light facility (SHINE) is under design and construction. The linac of SHINE facility is superconducting accelerat-ing structures of high gradients, whose performance is closely related to the cleanliness of superconducting cavities. Therefore, the beam line vacuum system has extremely high requirement for particle free to avoid particles down to submicrometric scale. To control parti-cle contamination, particle-free environment has been built for cavity string assembly and other beam line vacuum components installation, clean assembly criteri-on has been established. Furthermore, the particle gener-ation of vacuum components (valve, pump, et al.) has been studied. Moreover, dedicated equipment and com-ponent (slow pumping & slow venting system, non-contact RF shielding bellow) have been developed for particle-free vacuum system.  
poster icon Poster WEPPP045 [1.429 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP045  
About • Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 28 June 2024
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WEPPP046
 The Pumping Properties of Ti-Zr-V Non-Evaporable Getter Film Coated Vacuum Chambers  
 
  • J. Li, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, C.Y. Liu, Y. Nie, J. Wang, Y. Wang, G. Wei, P. Xiang, 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. In order to meet specific requirements, most of the vacuum chambers for the WALS 1.5 GeV storage ring are small aperture tubes. To achieve the vacuum requirement, the technology of non-evaporable getter (NEG) films deposited on the inner wall of chambers to deal with the small aperture of vacuum chambers. In this paper, the ternary Ti-Zr-V getter film was deposited on the stainless-steel tubes by using a developed cylindrical magnetron sputtering system. Microstructure characterizations were obtained by scanning electron microscopy. The pumping property for H₂ and CO of the films with different surface morphologies (dense and columnar) activated at various temperature were tested by the pumping property evaluate facility. The result in this paper indicated that the columnar films have a better pumping performance compared with the dense films. With the number of activations increases, the pumping performance decreases. To achieve the same pumping performance, the increase of the activation temperature or activation time is needed. 		 
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WEPPP047 Installation Process Experiment of HEPS Storage Ring Equipment 222
 
  • C.H. Li, F.S. Chen, S.Y. Chen, L. Dong, G. Feng, S. Lu, Z.H. Wang, L. Wu, Y.F. Wu, Y.D. Xu, M. Yang, S. Yang
    IHEP, Beijing, People’s Republic of China
  
  HEPS is a new generation synchrotron radiation source under construction in China. In order to complete high-precision installation of the 1.4km storage ring within a limited construction period, it is necessary to identify and solve potential issues in various aspects, including opera-tion space, installation process, alignment scheme, and unit transportation, prior to the regular batch installation. Therefore, a full-process installation experiment was performed and the feasibility of relevant schemes are verified. Batch installation is currently in progress based on the experimental experience.  
poster icon Poster WEPPP047 [0.874 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP047  
About • Received ※ 20 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 23 March 2024
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WEPPP048
 The Fabrication of Bonding Channel-Cut Monochromatic Crystal  
 
  • Q.S. Diao, Z. Hong, H. Lian
    IHEP, Beijing, People’s Republic of China
  
  Crystal monochromator is one of the core optical components of X-ray transmission, and its internal residual stress and surface roughness directly affect the quality of X-ray. With the development of synchrotron radiation sources, better uniformity and stability of X-ray beams are required. The beam intensity and position stability of conventional double crystal monochromator is affected by clamping and cooling mechanism. Although channel-cutl monochromator can meet the requirements of X-ray stability, but the polishing of the inside diffraction surface is a really challenge. It is difficult to promote implementation because the only guiding principle of empirical and lack of scientific data support system. So it is imperative to develop crystal monochromator with good beam quality and high stability. This project intends to combine the crystal polishing technology and optical surface shape measuring instrument to carry out research on micro-radian level high-precision crystal orientation and massive crystal silicon bonding technology, and complete a group of stress-free plane crystals with ultra-high surface shape accuracy within 1 ¿rad orientation error.  
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WEPPP049 Designs of Multiple Experimental Models for Pink SAXS Station 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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WEPPP050 Quick scanning Channel-Cut crystal monochromator for millisecond time resolution EXAFS at HEPS 229
 
  • Y.S. Lu, H. Liang, Z.K. Liu, D.S. Shen, Z. Sun, Y. Yang, S. Zhang, Y.S. Zhang
    IHEP, Beijing, People’s Republic of China
  
  The design and capabilities of a Quick scanning Channel-Cut monochromator (QCCM) for HEPS are presented. The quick scan and step scan are realized by a torque motor directly driven Bragg axis, controlled by a servo controller. This design allows easy and remote control of the oscillation frequency and angular range, providing comprehensive control of QXAFS measure-ments. The cryogenically cooled Si (311) and Si(111) crystals, which extends the energy range from 4.8 keV-45 keV. The dynamic analysis verifies the rationality of the mechanical structure design. The device was fabri-cated and tested, results show an oscillation frequency up to 50Hz with a range of 0.8°, and a resolution of 0.2 arcsecond in step scan mode. This device demonstrates the feasibility of large range quick scan and step scan by a single servo control system.
Quick scanning Channel-Cut crystal monochromator 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP050  
About • Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024
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WEPPP051 The Design of a 2 m Long Copper Light Extraction Vessel at Diamond Light Source for the Diamond-II Upgrade 233
 
  • V. Danielyan, M.P. Cox, R.T. Fielder, S.L. Hodbod, T. Lockwood, P.J. Vivian
    DLS, Oxfordshire, United Kingdom
  
  Challenges associated with the design are, firstly, the heat loads of I05 beamline upgrade involving the installation of a powerful and highly divergent APPLE-II Knot Insertion Device. Secondly, it is not easy to produce the required homogeneous NEG (non-evaporable getter) coating on the complex internal geometry of the vessel. Synchrotron light raytracing and thermal analysis has shown that an aluminium vessel with discrete copper absorbers was not capable of handling the high heat loads and it was decided to change to a copper vessel with large integrated absorbing surfaces. FEA analysis of the copper vessel shows the peak temperature is reduced from 446°C to 95°C for the copper vessel as compared to the aluminium vessel. NEG coating trials are currently in progress and will be followed by a full prototype. The minimum vertical aperture is 6 mm and the trials will show whether it can be reduced to 5 mm. The change from an aluminium vessel to a copper vessel will not only reduce the peak temperature of the vessel thereby making it a workable solution, but has the added benefits of improved vacuum performance, reduced beam impedance and reduced capital and operating cost.  
poster icon Poster WEPPP051 [1.861 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP051  
About • Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 02 June 2024
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WEPPP053
 PAL-EUV Storage Ring Girder System Design, Manufacturing, and Installation  
 
  • B.J. Kim, S.B. Lee, D.H. Na
    PAL, Pohang, Republic of Korea
  
  The PAL-EUV accelerator is relatively small in size, and the SRARC, which corresponds to 1/4 of the Storage Ring, consists of a total of 35 magnets with a diameter of approximately 7.2m, which is about 1/4 of the full size. The distance between the magnets in this section (Coil Epoxy) is approximately 20mm, and there are no bellows included. Initially, the Girder System Concept considered placing girders in separate cells, but due to the absence of bellows that compensate for the flexibility of the Vacuum Chamber, it was changed to a 1 piece type that can support the entire SRARC. In order to fabricate the curved structure with precision tolerances of approximately 6m, the girder was divided into 3 pieces and assembled to achieve the 1 piece type. The actual fabrication and installation work were conducted to verify its functionality.  
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WEPPP054 Vibration Analysis of Storage Ring Girder for the Korea 4GSR 236
 
  • G.W. Hong, T. Ha, H.S. Han, H.-G. Lee
    PAL, Pohang, Republic of Korea
  
  Ensuring the mechanical stability of the girder for a 4th generation storage ring (4GSR) is crucial to provide a high-quality photon beam to users because the mechanical motion should be maintained at less than 10% of the electron beam size which is expected to be sub-micrometer. One of the key roles of the girder is to provide structural rigidity and temperature stability while effectively suppressing vibrations from the ground during accelerator operation. The Korea 4GSR girder is being designed to have the first natural frequency above 50 Hz to minimize the effect of the ground vibration. In order to maintain better mechanical stability, it is necessary to conduct research not only on the natural vibration evaluation of the girder but also on external vibrations to the girder structure. In this paper, we introduce the result of the harmonic analysis of the girder structure using the finite element method.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP054  
About • Received ※ 25 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 July 2024
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WEPPP055
 Development of Photon Absorber for Multipurpose Synchrotron Radiation  
 
  • S.B. Lee, T. Ha, M.S. Hong, D.H. Na
    PAL, Pohang, Republic of Korea
  
  A photon absorber is a device used to protect vacuum chambers from intense photon beams generated from insertion devices and bending magnets. Such absorber absorbs excess photons as thermal energy and protects vacuum chambers and experimental apparatuses from potential damage. Simultaneously, these absorbers provide precisely tuned photon beams into beamlines.  
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WEPPP056
 PAL-EUV Vacuum System  
 
  • D.H. Na, B.J. Kim, S.H. Kim, S.B. Lee, Y.J. Park
    PAL, Pohang, Republic of Korea
  
  The PAL-EUV accelerator consists of a linear accelerator, booster, and storage-ring, including an injector. The electron beam generated by the injector laser is accelerated to 20 MeV in the linear accelerator, then its energy is raised to 400 MeV in the booster before being injected into the storage-ring. The electron beam injected into the storage-ring emits the photons used in the beamline as it passes through the insertion device. All vacuum devices, chambers, and supports for EUV have been manufactured, and individual vacuum leak tests have been completed for both the chambers and the vacuum devices. Currently, all vacuum devices and supports have been installed. Additionally, based on vacuum simulation results, vacuum components such as ion pumps, vacuum gauges, and vacuum valves have been positioned and the required vacuum levels for each section have been satisfied. Specifically, Baking and NEG activation procedures were performed to reach the required vacuum levels for storage-ring, thus achieving the vacuum level required for the EUV accelerator  
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WEPPP057
 Development of Advanced Mirror Adjustment Device for Multipurpose Synchrotron Radiation  
 
  • S.H. Kim, D. Jeong, S.H. Kim
    PAL, Pohang, Republic of Korea
  
  The Pohang Accelerator Laboratory’s PLS-II beamline currently utilizes three types of mirror adjustment devices, which have been developed and in use for several years. Based on the experience gained from the development and production of these mirror adjustment devices, a new type of mirror adjustment device is being developed for the Multi-Purpose Synchrotron Radiation Accelerator (4GSR) beamline under construction in Ochang, Chungcheongbuk-do. The types of mirror adjustment devices are categorized as the KB Mirror System, Bender Mirror System, and Mirror System. In the development of the mirror adjustment device, the design should aim to minimize the deformation of the mirror in the Mirror Mounting process. Additionally, efforts are being made to design the mirror cooling system to maximize cooling efficiency, and various tests are being conducted to improve the mechanical stability and address vibration issues in the Mirror Manipulator structure. The development of the mirror adjustment device aims to upgrade its performance and successfully install it in the Multi-Purpose Synchrotron Radiation Accelerator beamline.  
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WEPPP058 Permanent Magnets in SOLEIL II 240
 
  • A. Berlioux, Y. Benyakhlef, C.A. Kitégi, F. Marteau, A. Mary, R.E. Raimon, M. Ribbens, K. Tavakoli
    SOLEIL, Gif-sur-Yvette, France
  
  Twenty years after SOLEIL Synchrotron was established, the facility needs to adapt to follow new scientific fields that have emerged since. The proposed new lattice for upgrading SOLEIL storage ring will reduce the horizontal emittance by a factor 50 to reach less than 100 pm.rad. This new lattice presents significant challenges and requires compact magnets that provide strong gradients. As a result, permanent magnet (PM) technology is preferred over electromagnet (EM) technology whenever possible. All sextupoles and octupoles will be EM to ensure efficient optic correction. However, all dipoles, reverse bends and quadrupoles will be PM. The replacement of aging infrastructure and the use of PM will lead to a noticeable reduction in SOLEIL’s electric power consumption and environmental footprint. SOLEIL II lattice consists of 116 dipoles with gradient and 354 PM quadrupoles which can also be used as reverse bends. All PM multipoles have been designed by SOLEIL¿s Mechanical Engineering Group in close collaboration with the Magnetic and Insertion Devices Group. This contribution will present the design, assembly procedure, and prototyping of SOLEIL II PM multipoles.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP058  
About • Received ※ 23 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 July 2024
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WEPPP059
 Design of a High Stability Six Degrees of Freedom Precision Adjustable Mirror Box  
 
  • W.Y. Zhou
    USTC, Hefei, Anhui, People’s Republic of China
  • X. Xia
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  With the construction of synchrotron radiation light source entering the fourth generation light source stage of low emissivity and high brightness, the requirements for the resolution and stability of beam line optical equipment are getting higher and higher. This paper designs and analyzes a high stability six degrees of freedom precision adjustment mirror box. The vibration natural frequency of optical elements is 70.5Hz, the horizontal and vertical vibration amplification coefficient is 1.46 times of the X-axis of the optical path, and the vibration displacement RMS value is 35.8nm, Meet the requirement that the mirror vibration of the fourth generation light source beam optical equipment should not exceed 50nm.  
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