Author: Lin, M.H.
Paper Title Page
TUPYP028 Thermal Analysis Software for Optical Elements of Hefei Advanced Light Facility* 73
 
  • M.H. Lin, J. Chen, S.K. Jiang, Q.P. Wang, Z. Wang
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
 
  Ther­mal de­for­ma­tion is a key in­flu­enc­ing fac­tor in the sur­face shape of op­ti­cal com­po­nents for beam­line op­tics. In the process of beam­line de­sign, it is nec­es­sary not only to se­lect dif­fer­ent cool­ing schemes based on ther­mal load­ing con­di­tions but also to ex­ten­sively op­ti­mize the pa­ra­me­ters of these cool­ing schemes. The tra­di­tional ap­proach for op­ti­miz­ing cool­ing scheme de­sign often re­quires sig­nif­i­cant man­ual ef­fort. By in­te­grat­ing ex­ist­ing ex­pe­ri­ence in op­ti­miz­ing cool­ing scheme de­signs, this study trans­forms the pa­ra­me­ter­ized de­sign tasks that were orig­i­nally per­formed man­u­ally into au­to­mated processes using soft­ware. This paper pre­sents the lat­est ad­vance­ments in the au­to­mated de­sign soft­ware for cool­ing schemes of beam­line op­ti­cal com­po­nents, and the re­sults in­di­cate that the op­ti­miza­tion out­comes of the ex­ist­ing au­to­mated de­sign soft­ware are close to those achieved through man­ual op­ti­miza­tion.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP028  
About • Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 03 December 2023
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THPPP007 Optimizing Indirect Cooling of a High Accuracy Surface Plane Mirror in Plane-Grating Monochromator 280
 
  • J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
 
  Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility.
For the cool­ing of the plane mir­ror in VIA-PGMs (var-iable-in­cluded-an­gle plane-grat­ing mono­chro­ma­tors), the top-side in­di­rect cool­ing based on water is pre­ferred for its ad­van­tages, such as cheaper, eas­ier to use, smart notches, etc, when com­pared to the in­ter­nal cool­ing. But it also arises chal­lenges to con­trol the RMS resid­ual slope error of the mir­ror, whose re­quire­ment is less than 100 nano-ra­dian. This re­quire­ment is even hard to ful­fill, when com­bined with 1) the asym­me­try ther­mal de­for-ma­tion on the merid­ian of the foot­print area dur­ing the en­ergy scan­ning, 2) the high heat load de­duced by the syn­chro­tron light and 3) the no ob­vi­ous ef­fects of the clas­si­cal op­ti­miza­tions, such as in­creas­ing foot­print size, cool­ing ef­fi­ciency or adding smart notches. An ef­fec­tive way was found after nu­mer­ous at­tempts, which is to make the foot­print area far from the mir­ror¿s edge to re­duce the asym­me­try of the ther­mal de­for­ma­tion ex­cept for lead­ing to a longer mir­ror. This paper will il­lus­trate how the asym­me­try af­fects the mir­ror¿s resid­ual slope error and then, focus on the re­la­tion­ship among the asym­me­try of cool­ing and the dis­tance to pro­vide a ref-er­ence for op­ti­cal cool­ing.
 
poster icon Poster THPPP007 [1.805 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP007  
About • Received ※ 26 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 March 2024
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THPPP008 Optimization of Thermal Deformation of a Horizontally Deflecting High-Heat-Load Mirror Based on eInGa Bath Cooling 283
 
  • J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
 
  Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility.
The syn­chro­tron fa­cil­ity are de­vel­op­ing to­wards higher bright­ness, lower di­ver­gence, nar­rower pulse, higher sta­bil­ity, etc. There­fore, the re­quire­ments of the first mir­ror of the beam­line, who bear high-heat-load, were up­graded, and the per­for­mances of the mir­ror will be af­fected eas­ily by other fac­tors, such as flow in­duced vi­bra­tion, clamp­ing force, etc. In­di­rect water cool­ing based on eInGa bath is re­garded as an ef­fec­tive mean to solve these thorny prob­lems in de­sign­ing of the first mir­ror cool­ing. How­ever, for the case a hor­i­zon­tal de-flec­tion mir­ror, the uni­lat­eral cool­ing method is usu­ally adopted, re­sult­ing in some changes in the struc­ture of the mir­ror. In this paper, a first mir­ror hor­i­zon­tally de­flect-ing in Hefei ad­vanced light source (HALF) are taken as ex­am­ples to in­tro­duce the op­ti­miza­tion method to achieve ul­tra-low merid­ian slope error of the first hori-zon­tal de­flec­tion mir­ror. The re­sults show that this opti-miza­tion method pro­vides a rapid de­sign mean to de­sign the cool­ing scheme of the hor­i­zon­tally de­flect­ing mir­ror based on the eInGa bath.
 
poster icon Poster THPPP008 [2.901 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP008  
About • Received ※ 01 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 February 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)