MEDSI2023 - List of Authors (Tang, S.)

Paper	Title	Page
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 TUPYP010 [10.504 MB]
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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.
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TUPYP023	Design of a Long Versatile Detector Tube System for Pink Beam Small-Angle X-Ray Scattering (SAXS) Beamline at HEPS	64
	Z.Q. Cui, G. Mo, Z.N. Ou, S. Tang, X. Xing, J.C. Zhang IHEP, Beijing, People’s Republic of China
	The long versatile detector tube system for small-angle X-ray scattering meets the experimental conditions of -5-50° wide-angle X-ray scattering (WAXS), 0.04-6° small-angle X-ray scattering (SAXS) and 0.001-0.1° ultra-small-angle X-ray scattering (USAXS), record the same change process of the same sample, and obtain comprehensive structural information of atomic size, nanometer size and micron size, which can be applied to nanomaterials, mesoporous materials, biological macromolecules, polymers and other fields. The size of the tube system is 26760×1945×2565 mm,and consists of four parts: WAXS device, SAXS device, USAXS device and vacuum chamber. The vacuum chamber is assembled by connecting and assembling parts such as thick and fine pipes, bellows, heads and vacuum valves, with a length of 13775 mm and an inner diameter of 1500mm. The thin pipe is 7740 mm long and has an inner diameter of 300 mm. The design scheme of the tube system is committed to ensuring that the distance between the SAXS detector and the sample is continuously adjustable within the range of 1-13.5 m in vacuum environment, and the straightness of the 13840 mm long track of the SAXS device is better than 1 mm.
	Poster TUPYP023 [1.737 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP023
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 January 2024
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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, Beijing, 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.
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TUPYP037	Mechanical Design of Multilayer Kirkpatrick-Baez (KB) Mirror System for Structural Dynamics Beamline (SDB) at High Energy Photon Source (HEPS)	82
	R.Y. Liao, L. Gao, Z.N. Ou, S. Tang, H.H. Yu, B.B. Zhang IHEP, Bejing, People’s Republic of China
	SDB aims in-situ real-time diagnosis in dynamic compression science and additive manufacturing. Nano-experimental environment requires highly multilayer KB mirror system in thermal deformation and stability of mechanism. This paper illustrates the KB cooling scheme and mechanical design. Only using variable-length water cooling to control the temperature and thermal deformation of mirror has limitations here. First, the installation of cooling system should be non-contact so that the surface shape can be sophisticatedly controlled without deformation of chucking power. Second, the distance between the HKB and the sample stage is too small to arrange the cooling pipe. Third, the KB mirror has multi-dimensional attitude adjustment. Cu water cooling pipe would be dragged with adjustment thus it has to be bent for motion decoupling, which occupies considerable space. Thus, the Cu cooling block and water cooling pipe are connected by copper braid. Eutectic Gallium-Indium fills a 100 ¿m gap between the cooling block and KB mirror to avoid chunking power deformation. Finally, the structural stability and chamber sealability is analyzed.
	Poster TUPYP037 [1.234 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP037
About •	Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024
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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.
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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, Beijing, 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.
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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.
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WEOBM02	Development of the Bent Focusing Mirror in HEPS from Design to Test	136
	M.W. Chen, M. Li, S. Tang, F.G. Yang IHEP, Beijing, People’s Republic of China
	The focusing mirrors are important for each beamline in the 4th generation photon source. One bent focusing face-down mirror in HEPS is taken for an example to be introduced from the design to the test. The effect of the gravity of the mirror is considered in the design. Moreover, for the sake of the compromise between the processing and the precision, the polygonal structure is adopted. Also, the iteration of the solution is improved to increase the design efficiency. The results reveal that the theoretical precision of the mirror after bending can reach less than 100 nrad RMS. In the aspect of the mechanics, the scheme of four roller bender comes out to avoid the parasitic moment, and the movable component in the bender are all coated with the MoS2. As the type of the measurement is facing side which is different from the type of the actual condition, the effect of the gravity must be included in the metrology results. In the meantime, the stability and the repeatability are also measured. The result can be converged to around 200 nrad RMS, which is less than the required error. The stability, ¿R/R, can be constrained under the 0.6%, showing the outstanding performance.
	Slides WEOBM02 [3.638 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM02
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 16 April 2024
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WEOBM07	Design, Modeling and Analysis of a Novel Piezoactuated XY Nanopositioner Supporting Beamline Optical Scanning	150
	L.F. Wang, G.C. Chang, S. Tang, Z.Y. Yue, L. Zhang IHEP, Beijing, People’s Republic of China
	In recent years, with the advancement of X-ray optics technology, the spot size of synchrotron beamlines has been reduced to 10nm or even smaller. The reduction in spot size and the emergence of ultra-bright synchrotron sources necessitate higher stability, resolution, and faster scanning speeds for positioning systems. This paper presents the design, analysis, and simulation of an XY piezoelectric driven nanopositioning platform that supports high-precision optical scanning systems. To achieve fast and highly precise motion under the load of an optical system, a design scheme based on a hollow structure with flexible amplification and guiding mechanisms is proposed. This scheme increases displacement output while minimizing coupling displacement to ensure a high natural frequency. The rationality of this platform design is verified through modeling and finite element simulation.
	Slides WEOBM07 [3.448 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM07
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 18 April 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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THOAM04	Overall Progress on Development of X-ray Optics Mechanical Systems at High Energy Photon Source (HEPS)	252
	S. Tang, Y.H. Dong, X.H. Kuang, M. Li, H. Liang, R.Y. Liao, L.H. Ma, Z.N. Ou, H. Qian, Z.R. Ren, W.F. Sheng, J. Wang, R.Z. Xu, H.H. Yu IHEP, People’s Republic of China
	Funding: This work is supported by the project of High Energy Photon Source (HEPS). High Energy Photon Source (HEPS) regarded as a new 4th generation synchrotron radiation facility, is under construction in a virgin green field in Beijing, China. The X-ray optics/mirror mechanical systems (MMS) play an important role, which would be expected to be designed carefully and rigidly for the extremely stable performance requirement of HEPS. In addition, there are indeed big challenges due to so many types of mirror systems, such as white beam mirror (WBM), harmonic suppression mirror (HSM), combined deflecting mirror (CDM), bending mirror, Nano-KB, and the transfocator of Compound refractive lens (CRLs), etc. Therefore, overall progress on design and maunfacturing of the MMS is introduced, in which a promoting strategy and generic mirror mechanical system as a key technology is presented and developed for the project of HEPS. Furthermore, ultra-stable structucture, multi-DOF precision positioning, Eutectic Galium Indium (E-GaIn)-based vibration-decoupling watercooling, clamping, and bending have always been prior designs and considerations. Shanzhi Tang, Weifan Sheng, Jianye Wang, et al, Overall progress on the design of mirror mechanical systems at High Energy Photon Source (HEPS), SRI2021, Hamburg Germany, 2022. POSTER
	Slides THOAM04 [2.328 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM04
About •	Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024
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THPPP021	Ultra-Stable and Multi-DOF Bent KB Mirror Mechanical System for Hard X-Ray High Energy Resolution Spectroscopy (HX-HERS) Beamline of HEPS
	R.Z. Xu, M. Li, W.F. Sheng, S. Tang, H.H. Yu IHEP, Beijing, People’s Republic of China
	The KB mirror system designed for the HX-HERS beamline was expected to focus the spot size down to 2¿m×2¿m and achieve 5-DOF adjustment of each mirror. However, the long mirror length leaded large size of the overall mechanism and the limited height space for multi-dimensional adjustment makes the mechanical design of the KB system with both stability and functionality difficult. In this KB system, each mirror is bent by a four-bar bender universally used in HEPS to obtain the required profile. A combination of parallel and serial mechanism with totally 11-DOF is designed to realize the adjustment requirements. Specifically, the parallel mechanism is a three-point support design that serves as the base of the KB mirror chamber and offers coarse tuning of 5-DOF, exhibiting great compactness and high stiffness. The series mechanism is a stacking of four angle and two displacement adjustment mechanisms up to 6-DOF. These independent stages with high resolution are assigned to VFM and HFM respectively to achieve fine adjustment of their relative positions. In the design of each angle and displacement adjustment stage, the height and rigidity of the mechanism are also fully considered.
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THPPP022	A compact direct measurement method for relative positioning of KB mirrors nano-experimental apparatus based on grating interferometers
	S. Tang, T. He, M. Li, R.Y. Liao, Z.N. Ou, W.F. Sheng, Y. Tao, H.H. Yu, L. Zhou IHEP, People’s Republic of China T. He University of Chinese Academy of Sciences, Beijing, People’s Republic of China H.H. Yu UCAS, Beijing, People’s Republic of China
	Funding: This work is supported by the project of High Energy Photon Source (HEPS). Positioning measurement is regraded as an effective way for the position compensation and feedback of nano-experimental apparatus. However, it usually suffers many restrictions from the complicated applied occasion of a typical performance beamline for next-generation synchrotron radiation light source. To deal with the problem, a compact direct measurement method based on grating interferometers is presented. The principle, configuration, experiment are designed and implemented for the verification of the feasibility. It performs a high resolution in orthogonal/lateral direction relative to laser beam, which can overcome an infeasible shortage of a typical interferometer for direct lateral positioning. So, it is used for positioning measurement & compensation between KB mirrors and nano-stages of a sample for the experiments of CDI, bragg-CDI, pytchograph, XPCS, etc. Compared with the existed methods, huge frame, two vacuum chambers restriction, multi-axis interferometer and benchmark relay are avoided for the compact system by using proposed method.
	Poster THPPP022 [2.006 MB]
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THPPP033	Design of Ultra-Stable and Multi-DOF Generic Mirror Mechanical System at High Energy Photon Source (HEPS)
	L.H. Ma, M. Li, W.F. Sheng, S. Tang, J.Y. Wang IHEP, Beijing, People’s Republic of China M. Li, W.F. Sheng University of Chinese Academy of Sciences, Beijing, People’s Republic of China S. Tang UCAS, Beijing, People’s Republic of China
	The main function of the generic mirror chamber system in HEPS is to support, adjust the pose and provide the ultra-high vacuum environment of the optical elements in the beamline. Its pose adjustment requires micrometer or submicroradian level repetitive positioning accuracy and adjustment resolution. The white beam bending mirror chamber in the generic mirror chamber system of the Hard X-ray Nanoprobe Multimodal Imaging Beamline(B2) is taken as an example, to discuss the design of its pose adjustment mechanism. It needs to achieve 5-DOF for pose adjustment function. This paper proposes using a multi-layer marble structure and a combination of multiple motion mechanisms to achieve this function. The motor and screw-nut pair drive sliders can achieve 2-DOF adjustment. The motor and screw-nut pair drive two wedge-shaped blocks can achieve 2-DOF adjustment. The motor and straight circular flexible hinge drive a disc-type flexible hinge can achieve one angle adjustment. Finally, through series of numerical calculations, finite element simulations and physical experiments, it is demonstrated that the design indexes meet the requirements, thus verifying the feasibility of the scheme.
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Paper

Title

Page

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 TUPYP010 [10.504 MB]

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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.

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TUPYP023

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

64

Z.Q. Cui, G. Mo, Z.N. Ou, S. Tang, X. Xing, J.C. Zhang
IHEP, Beijing, People’s Republic of China

The long versatile detector tube system for small-angle X-ray scattering meets the experimental conditions of -5-50° wide-angle X-ray scattering (WAXS), 0.04-6° small-angle X-ray scattering (SAXS) and 0.001-0.1° ultra-small-angle X-ray scattering (USAXS), record the same change process of the same sample, and obtain comprehensive structural information of atomic size, nanometer size and micron size, which can be applied to nanomaterials, mesoporous materials, biological macromolecules, polymers and other fields. The size of the tube system is 26760×1945×2565 mm,and consists of four parts: WAXS device, SAXS device, USAXS device and vacuum chamber. The vacuum chamber is assembled by connecting and assembling parts such as thick and fine pipes, bellows, heads and vacuum valves, with a length of 13775 mm and an inner diameter of 1500mm. The thin pipe is 7740 mm long and has an inner diameter of 300 mm. The design scheme of the tube system is committed to ensuring that the distance between the SAXS detector and the sample is continuously adjustable within the range of 1-13.5 m in vacuum environment, and the straightness of the 13840 mm long track of the SAXS device is better than 1 mm.

Poster TUPYP023 [1.737 MB]

DOI •

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

About •

Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 25 January 2024

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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, Beijing, 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.

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TUPYP037

Mechanical Design of Multilayer Kirkpatrick-Baez (KB) Mirror System for Structural Dynamics Beamline (SDB) at High Energy Photon Source (HEPS)

82

R.Y. Liao, L. Gao, Z.N. Ou, S. Tang, H.H. Yu, B.B. Zhang
IHEP, Bejing, People’s Republic of China

SDB aims in-situ real-time diagnosis in dynamic compression science and additive manufacturing. Nano-experimental environment requires highly multilayer KB mirror system in thermal deformation and stability of mechanism. This paper illustrates the KB cooling scheme and mechanical design. Only using variable-length water cooling to control the temperature and thermal deformation of mirror has limitations here. First, the installation of cooling system should be non-contact so that the surface shape can be sophisticatedly controlled without deformation of chucking power. Second, the distance between the HKB and the sample stage is too small to arrange the cooling pipe. Third, the KB mirror has multi-dimensional attitude adjustment. Cu water cooling pipe would be dragged with adjustment thus it has to be bent for motion decoupling, which occupies considerable space. Thus, the Cu cooling block and water cooling pipe are connected by copper braid. Eutectic Gallium-Indium fills a 100 ¿m gap between the cooling block and KB mirror to avoid chunking power deformation. Finally, the structural stability and chamber sealability is analyzed.

Poster TUPYP037 [1.234 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP037

About •

Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024

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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.

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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, Beijing, 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.

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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.

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WEOBM02

Development of the Bent Focusing Mirror in HEPS from Design to Test

136

M.W. Chen, M. Li, S. Tang, F.G. Yang
IHEP, Beijing, People’s Republic of China

The focusing mirrors are important for each beamline in the 4th generation photon source. One bent focusing face-down mirror in HEPS is taken for an example to be introduced from the design to the test. The effect of the gravity of the mirror is considered in the design. Moreover, for the sake of the compromise between the processing and the precision, the polygonal structure is adopted. Also, the iteration of the solution is improved to increase the design efficiency. The results reveal that the theoretical precision of the mirror after bending can reach less than 100 nrad RMS. In the aspect of the mechanics, the scheme of four roller bender comes out to avoid the parasitic moment, and the movable component in the bender are all coated with the MoS2. As the type of the measurement is facing side which is different from the type of the actual condition, the effect of the gravity must be included in the metrology results. In the meantime, the stability and the repeatability are also measured. The result can be converged to around 200 nrad RMS, which is less than the required error. The stability, ¿R/R, can be constrained under the 0.6%, showing the outstanding performance.

Slides WEOBM02 [3.638 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM02

About •

Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 16 April 2024

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WEOBM07

Design, Modeling and Analysis of a Novel Piezoactuated XY Nanopositioner Supporting Beamline Optical Scanning

150

L.F. Wang, G.C. Chang, S. Tang, Z.Y. Yue, L. Zhang
IHEP, Beijing, People’s Republic of China

In recent years, with the advancement of X-ray optics technology, the spot size of synchrotron beamlines has been reduced to 10nm or even smaller. The reduction in spot size and the emergence of ultra-bright synchrotron sources necessitate higher stability, resolution, and faster scanning speeds for positioning systems. This paper presents the design, analysis, and simulation of an XY piezoelectric driven nanopositioning platform that supports high-precision optical scanning systems. To achieve fast and highly precise motion under the load of an optical system, a design scheme based on a hollow structure with flexible amplification and guiding mechanisms is proposed. This scheme increases displacement output while minimizing coupling displacement to ensure a high natural frequency. The rationality of this platform design is verified through modeling and finite element simulation.

Slides WEOBM07 [3.448 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOBM07

About •

Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 18 April 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

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

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THOAM04

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

252

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

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

Slides THOAM04 [2.328 MB]

DOI •

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

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

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THPPP021

Ultra-Stable and Multi-DOF Bent KB Mirror Mechanical System for Hard X-Ray High Energy Resolution Spectroscopy (HX-HERS) Beamline of HEPS

R.Z. Xu, M. Li, W.F. Sheng, S. Tang, H.H. Yu
IHEP, Beijing, People’s Republic of China

The KB mirror system designed for the HX-HERS beamline was expected to focus the spot size down to 2¿m×2¿m and achieve 5-DOF adjustment of each mirror. However, the long mirror length leaded large size of the overall mechanism and the limited height space for multi-dimensional adjustment makes the mechanical design of the KB system with both stability and functionality difficult. In this KB system, each mirror is bent by a four-bar bender universally used in HEPS to obtain the required profile. A combination of parallel and serial mechanism with totally 11-DOF is designed to realize the adjustment requirements. Specifically, the parallel mechanism is a three-point support design that serves as the base of the KB mirror chamber and offers coarse tuning of 5-DOF, exhibiting great compactness and high stiffness. The series mechanism is a stacking of four angle and two displacement adjustment mechanisms up to 6-DOF. These independent stages with high resolution are assigned to VFM and HFM respectively to achieve fine adjustment of their relative positions. In the design of each angle and displacement adjustment stage, the height and rigidity of the mechanism are also fully considered.

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THPPP022

A compact direct measurement method for relative positioning of KB mirrors nano-experimental apparatus based on grating interferometers

S. Tang, T. He, M. Li, R.Y. Liao, Z.N. Ou, W.F. Sheng, Y. Tao, H.H. Yu, L. Zhou
IHEP, People’s Republic of China
T. He
University of Chinese Academy of Sciences, Beijing, People’s Republic of China
H.H. Yu
UCAS, Beijing, People’s Republic of China

Funding: This work is supported by the project of High Energy Photon Source (HEPS).
Positioning measurement is regraded as an effective way for the position compensation and feedback of nano-experimental apparatus. However, it usually suffers many restrictions from the complicated applied occasion of a typical performance beamline for next-generation synchrotron radiation light source. To deal with the problem, a compact direct measurement method based on grating interferometers is presented. The principle, configuration, experiment are designed and implemented for the verification of the feasibility. It performs a high resolution in orthogonal/lateral direction relative to laser beam, which can overcome an infeasible shortage of a typical interferometer for direct lateral positioning. So, it is used for positioning measurement & compensation between KB mirrors and nano-stages of a sample for the experiments of CDI, bragg-CDI, pytchograph, XPCS, etc. Compared with the existed methods, huge frame, two vacuum chambers restriction, multi-axis interferometer and benchmark relay are avoided for the compact system by using proposed method.

Poster THPPP022 [2.006 MB]

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THPPP033

Design of Ultra-Stable and Multi-DOF Generic Mirror Mechanical System at High Energy Photon Source (HEPS)

L.H. Ma, M. Li, W.F. Sheng, S. Tang, J.Y. Wang
IHEP, Beijing, People’s Republic of China
M. Li, W.F. Sheng
University of Chinese Academy of Sciences, Beijing, People’s Republic of China
S. Tang
UCAS, Beijing, People’s Republic of China

The main function of the generic mirror chamber system in HEPS is to support, adjust the pose and provide the ultra-high vacuum environment of the optical elements in the beamline. Its pose adjustment requires micrometer or submicroradian level repetitive positioning accuracy and adjustment resolution. The white beam bending mirror chamber in the generic mirror chamber system of the Hard X-ray Nanoprobe Multimodal Imaging Beamline(B2) is taken as an example, to discuss the design of its pose adjustment mechanism. It needs to achieve 5-DOF for pose adjustment function. This paper proposes using a multi-layer marble structure and a combination of multiple motion mechanisms to achieve this function. The motor and screw-nut pair drive sliders can achieve 2-DOF adjustment. The motor and screw-nut pair drive two wedge-shaped blocks can achieve 2-DOF adjustment. The motor and straight circular flexible hinge drive a disc-type flexible hinge can achieve one angle adjustment. Finally, through series of numerical calculations, finite element simulations and physical experiments, it is demonstrated that the design indexes meet the requirements, thus verifying the feasibility of the scheme.

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