Author: de Albuquerque, G.S.
Paper Title Page
TUPYP004 A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates 37
 
  • B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerque
    LNLS, Campinas, Brazil
  • V.C. Kuriyama
    CNPEM, Campinas, SP, Brazil
  • A. Lopes Ribeiro
    Federal University of Uberlandia, Uberlândia, M.G., Brazil
  • J.H. dos Santos
    IF-UFRGS, Porto Alegre, Brazil
  
  The de­sign of op­ti­cal el­e­ments com­pass dif­fer­ent de­vel­op­ment areas, such as op­tics, struc­tures and dy­nam­ics, ther­mal, and con­trol. In par­tic­u­lar, the ther­mal de­signs of mir­rors aim to min­i­mize de­for­ma­tions, whose usual re­quire­ments are around 5 nm RMS and slope er­rors in the order of 150 nrad RMS. One of the main sources of un­cer­tain­ties in ther­mal de­signs is the in­con­sis­tency in val­ues of ther­mal con­tact re­sis­tances (TCR) found in the lit­er­a­ture. A de­vice based on the ASTM D5470 stan­dard was pro­posed and de­signed to mea­sure the TCR among ma­te­ri­als com­monly used in mir­ror sys­tems. Pre­ci­sion en­gi­neer­ing de­sign tools were used to deal with the chal­lenges re­lated to the op­er­a­tion at cryo­genic tem­per­a­tures (145 K) and under sev­eral pres­sures rates (1~10 MPa) whilst en­sur­ing the align­ment be­tween the spec­i­mens. We ob­served using in­dium as Ther­mal In­ter­face Ma­te­r­ial re­duced the TCR in 10~42,2% for SS316/Cu con­tacts, and 31~81% for Al/Cu. Upon an­a­lyz­ing the mea­sure­ments, we iden­ti­fied some areas for im­prove­ments in the equip­ment, such as mit­i­gat­ing ra­di­a­tion and im­prov­ing the heat flow in the cold part of the sys­tem that were im­ple­mented for the up­graded ver­sion.  
poster icon Poster TUPYP004 [2.549 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004  
About • Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024
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WEPPP002 The Status of the High-Dynamic DCM-Lite for Sirius/LNLS 154
 
  • G.S. de Albuquerque, J.P.S. Furtado, N.P. Hara, M. Saveri Silva, T.R. Silva Soares
    LNLS, Campinas, Brazil
  
  Funding: Ministry of Science, Technology and Innovation (MCTI)
Two new High-Dy­nam­ics Dou­ble Crys­tal Mono­chro­ma­tors (HD-DCM-Lite) are under in­stal­la­tion for QUATI (su­per­bend) and SA­PU­CAIA (un­du­la­tor) beam­lines at Sir­ius. The HD-DCM-Lite por­trays an up­dated ver­sion of Sir­ius LNLS HD-DCMs not only in terms of being a lighter equip­ment for si­nu­soidal scans speeds with even higher sta­bil­ity goals, but also bring­ing for­ward greater ro­bust­ness for Sir­ius mono­chro­ma­tors pro­jects. It takes ad­van­tage of the ex­pe­ri­ence gained from as­sem­bly and op­er­a­tion of the pre­vi­ous ver­sions dur­ing the last years con­sid­er­ing sev­eral work fronts, from the me­chan­ics of the bench and cool­ing sys­tems to FMEA, align­ment pro­ce­dures and con­trol up­grades. In this work those chal­lenges are de­picted, and first of­fline re­sults re­gard­ing ther­mal and dy­nam­i­cal as­pects are pre­sented. 		 
poster icon Poster WEPPP002 [7.970 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP002  
About • Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 11 December 2023
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THOAM05 Modeling the Disturbances and the Dynamics of the New Micro CT Station for the MOGNO Beamline at Sirius/LNLS 256
 
  • G.S. Baldon, F. Ferracioli, R.R. Geraldes, G.B.Z.L. Moreno, G.S. de Albuquerque
    LNLS, Campinas, Brazil
  
  Funding: Ministry of Science, Technology and Innovation (MCTI)
At the 4th gen­er­a­tion syn­chro­tron lab­o­ra­tory Sir­ius at the Brazil­ian Syn­chro­tron Light Lab­o­ra­tory (LNLS), MOGNO is a high en­ergy imag­ing beam­line*, whose Nano Com­puted To­mog­ra­phy (CT) sta­tion is al­ready in op­er­a­tion. The beam­line’s 120x120 nm focus size, 3.1x3.1 mrad beam di­ver­gence, and 9·1011 ph/s flux at 22-67 keV en­ergy, al­lows ex­per­i­ments with bet­ter tem­po­ral and spa­tial res­o­lu­tion than lower en­ergy and lower sta­bil­ity light sources. To fur­ther uti­lize its po­ten­tial, a new Micro CT sta­tion is under de­vel­op­ment to per­form ex­per­i­ments with 0.5-55 um res­o­lu­tion, and up to 4 Hz sam­ple ro­ta­tion. To achieve this, a model of the dis­tur­bances af­fect­ing the sta­tion was de­vel­oped, which com­prised: i) the char­ac­ter­i­za­tion and sim­u­la­tion of dis­tur­bances, such as ro­ta­tion forces; and ii) the mod­el­ing of the dy­nam­ics of the Mi­cro-sta­tion. The dy­namic model was built with the in-house de­vel­oped Dy­namic Error Bud­get­ing Tool**, which uses dy­namic sub­struc­tur­ing to model 6 de­grees of free­dom rigid body sys­tems. This work dis­cusses the trade­offs be­tween ro­ta­tion-re­lated pa­ra­me­ters af­fect­ing the sam­ple to op­tics sta­bil­ity and the ex­per­i­ment res­o­lu­tion in the fre­quency do­main in­te­grated up to 2kHz.
* N. L. Archilha, et al. 2022, J. Phys.: Conf. Ser. 2380 012123.
** R. R. Geraldes et al. 2022, Precision Engineering Vol. 77, 90-103. 		 
slides icon Slides THOAM05 [11.814 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM05  
About • Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 March 2024
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)