Author: Yu, H.H.
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.  
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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 icon Poster TUPYP037 [1.234 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP037  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024
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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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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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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 		 
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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. 		 
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