Author: Wang, S.F.
Paper Title Page
TUOAM05 Thermal-Deformation-Based X-Ray Active Optics Development in IHEP 10
 
  • F.G. Yang, D.Z. Diao, H. Dong, J. Han, M. Li, W.F. Sheng, S.F. Wang, X.W. Zhang
    IHEP, Beijing, People’s Republic of China
  • L. Kang
    IHEP CSNS, Guangdong Province, People’s Republic of China
  
  Funding: National Natural Science Foundation of China (11505212, 11875059); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2019012).
Ad­vanced light source re­quire small wave­front dis­tor­tion to main­tain the qual­ity of the X-ray beam. Ac­tive op­ti­cal wave­front cor­rec­tion tech­nol­ogy is a very im­por­tant so­lu­tion to solve the ser­vice prob­lems of ul­tra-pre­cise de­vices under such con­di­tions. In this paper, we will re­port our re­cent progress on this ac­tive op­tics sys­tem de­vel­op­ment in­clud­ing sur­face metrol­ogy and mir­ror mod­u­la­tion. Based on the re­search of laser-heat­ing-based ther­mal de­for­ma­tion mod­u­la­tion tech­nol­ogy, this pro­ject pro­poses to mod­ify the mir­ror sur­face of X-ray mir­rors based on semi­con­duc­tor mi­cro­fab­ri­ca­tion process, and mod­u­late the local de­for­ma­tion of the mir­ror sur­face by elec­tric heat­ing to re­al­ize the sur­face shape cor­rec­tion /mod­u­la­tion of X-ray mir­rors. Since the mod­u­la­tion unit acts di­rectly on the re­flec­tive re­gion of the mir­ror sur­face, it has a bet­ter sur­face shape cor­rec­tion ca­pa­bil­ity than the con­ven­tional body de­for­ma­tion mod­u­la­tion. The so­lu­tion also has the ad­van­tage of high ef­fi­ciency and low cost.
*Yang F, Li M, Gao L, et al. Laser-heating-based active optics for synchrotron radiation applications[J]. Optics Letters, 2016, 41(12): 2815-2818. 		 
slides icon Slides TUOAM05 [18.205 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM05  
About • Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 February 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPYP013
 Highly Efficient Thermal Deformation Optimization Method for Smart-Cut Mirrors over the Entire Photon Energy Range  
 
  • S.F. Wang
    IHEP, Beijing, People’s Republic of China
  
  Funding: X-ray Mirror Innovation Cross Team, Chinese Academy of Sciences, (JCTD-2020-02) Measure and Study of Synchrotron Radiation Optical Components In Situ Environment, IHEP, 2019.
For heat load gen­er­ated by syn­chro­tron ra­di­a­tion, it is a chal­lenge to op­ti­mize the ther­mal de­for­ma­tion of the mir­ror over the en­tire pho­ton en­ergy range. A the­o­ret­i­cal method is used to quan­ti­ta­tively eval­u­ate the in­flu­ence of the ther­mal load on the ther­mal de­for­ma­tion of the mir­ror. The re­sult of the­o­ret­i­cal cal­cu­la­tions and fi­nite el­e­ment analy­sis (FEA) are con­sis­tent, which proves the fea­si­bil­ity of the method. The ther­mal de­for­ma­tion op­ti­miza­tion the­ory pro­posed in this paper re­quires only one round op­ti­miza­tion cal­cu­la­tion and check com­pu­ta­tion in FEA. Sig­nif­i­cantly re­duce the work­load of mir­ror de­sign. And the de­sign work has taken care of all the pho­ton en­ergy points. Avoid op­ti­miz­ing mir­rors at a cer­tain en­ergy point, re­sult­ing in large de­for­ma­tions at other en­ergy points. In ad­di­tion, de­sign­ers can pre­dict the ther­mal de­for­ma­tion of the mir­ror at a cer­tain en­ergy point with­out FEA sim­u­la­tion. This will pro­vide guid­ance for the cor­rec­tion of the spher­i­cal item of the WBM’s ther­mal de­for­ma­tion by down­stream op­tics, such as fo­cus­ing mir­ror, com­pound re­frac­tive lens (CRL) and so on. 		 
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THOBM03
 Progress and Core Technologies Development of Monochromators for HEPS  
 
  • H. Liang, M.W. Chen, X.B. Deng, Q.S. Diao, L. Gao, Z. Hong, G. Li, M. Li, Z.K. Liu, Y.S. Lu, D.S. Shen, W.F. Sheng, S.F. Wang, Y. Yang, Z.Y. Yue, L. Zhang, S. Zhang, Y.S. Zhang, A.Y. Zhou
    IHEP, Beijing, People’s Republic of China
  
  HEPS is the first low emit­tance 4th gen­er­a­tion light source in China, as mono­chro­ma­tors are often lim­it­ing the per­for­mance of beam­lines, many chal­lenges are faced to pre­serve the qual­ity of the beam. In order to meet the strin­gent and ver­sa­tile re­quire­ments of 12 in house de­vel­oped mono­chro­ma­tors for dif­fer­ent beam­lines, sev­eral core tech­nolo­gies have been stud­ied and de­vel­oped. Sta­bil­ity con­sid­er­a­tions, vi­bra­tion mea­sure­ment sys­tem and meth­ods are in­tro­duced, sta­bil­ity below 10 nrad RMS are mea­sured for op­er­a­tion con­di­tions by laser in­ter­fer­om­e­ters. Ther­mal re­sis­tance study at low tem­per­a­ture was car­ried out, en­abling more ac­cu­rate FEA of cool­ing. Clamp­ing de­for­ma­tion of crys­tals at low tem­per­a­ture are ex­per­i­men­tally stud­ied, slope er­rors below 0.1 mi­cro­ra­dian RMS are mea­sured. De­sign and test re­sults on dif­fer­ent types of mono­chro­ma­tors will also be pre­sented. Re­sults show that the in house de­vel­oped mono­chro­ma­tors are able to meet the re­quire­ments of HEPS beam­lines.  
slides icon Slides THOBM03 [8.445 MB]  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)