Author: Ren, Z.R.
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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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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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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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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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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 icon 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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