Author: Parise, R.L.
Paper Title Page
TUPAB400 Manufacturing of Ceramic Vacuum Chambers for Sirius On-Axis Kicker 2457
 
  • R. Defavari, O.R. Bagnato, M.W.A. Feitosa, F.R. Francisco, D.Y. Kakizaki, R.L. Parise, R.D. Ribeiro
    LNLS, Campinas, Brazil
  
  Ce­ramic vac­uum cham­bers were pro­duced by LNLS for the Sir­ius kick­ers. Alu­mina tubes with an el­lip­ti­cal inner shape of 9.5 mm (V) x 29 mm (H) and 500 mm long were suc­cess­fully man­u­fac­tured by a Brazil­ian com­pany. Metal­lic F136 ti­ta­nium flanges were brazed to Nb in­serts using Ag-58.5Cu-31.5Pd wt% alloy, these in­serts were brazed to the ce­ramic using Ag-26.7Cu-4.5Ti wt% ac­tive filler metal. A ti­ta­nium film was coated in­side the cham­ber using argon plasma by RF Mag­netron Sput­ter­ing tech­nique. Sam­ples have been in­ves­ti­gated by Scan­ning Elec­tron Mi­croscopy (SEM) to mea­sure film thick­ness along the inner sec­tion of the tube, coat­ing mor­phol­ogy, chem­i­cal com­po­si­tion and ho­mo­gene­ity. The total elec­tri­cal re­sis­tance of the tube was also mon­i­tored dur­ing the sput­ter­ing process to achieve the de­sired value (0.2 ohms/square). In this con­tri­bu­tion, we pre­sent the re­sults of an On-Axis kicker man­u­fac­tur­ing process de­vel­oped by LNLS.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB400  
About • paper received ※ 18 May 2021       paper accepted ※ 31 May 2021       issue date ※ 29 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPAB401 Mechanical Design, Fabrication and Characterization of Electron Beam Position Monitors for Sirius 2461
 
  • R. Defavari, O.R. Bagnato, M.W.A. Feitosa, F.R. Francisco, G.R. Gomes, D.Y. Kakizaki, R.L. Parise, R.D. Ribeiro
    LNLS, Campinas, Brazil
  
  Beam Po­si­tion Mon­i­tors were de­signed and man­u­fac­tured to meet Sir­ius op­er­a­tion re­quire­ments. Final di­men­sional ac­cu­racy and sta­bil­ity of the BPM were achieved by care­ful spec­i­fi­ca­tion of its com­po­nents’ man­u­fac­tur­ing tol­er­ances and ma­te­ri­als. AISI-305 Stain­less Steel was used for the BPM sup­port fab­ri­ca­tion due to mag­netic and ther­mal ex­pan­sion con­straints. High pu­rity molyb­de­num for the elec­trode pin and Ti6Al4V F136 G23 alloy for hous­ing was used to man­u­fac­ture the sen­sor com­po­nents for their ther­mal char­ac­ter­is­tics. The elec­tri­cal in­su­la­tor was made of high alu­mina. The ma­te­ri­als were joined by an ac­tive metal braz­ing process using 0,01mm ac­cu­rate fix­tures. The brazed sen­sors were sub­jected to di­men­sional, me­chan­i­cal, and met­al­lur­gi­cal test­ing, as well as leak de­tec­tion and op­ti­cal mi­croscopy in­spec­tion at each stage. The sen­sors were joined in Ti6Al4V F136 BPM bod­ies using TIG weld­ing. Di­men­sional sort­ing was used to choose groups of sen­sors-to-body, and body-to-sup­port pairs dur­ing the final as­sem­bly. 160 BPMs are cur­rently in op­er­a­tion on Sir­ius stor­age ring. In this con­tri­bu­tion, we pre­sent the re­sults of BPM man­u­fac­tur­ing and test­ing processes de­vel­oped for Sir­ius.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB401  
About • paper received ※ 18 May 2021       paper accepted ※ 31 May 2021       issue date ※ 29 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPAB334 Development of Diffusion Bonded Joints of AA6061 Aluminum Alloy to AISI 316LN Stainless Steel for Sirius Planar Undulators 3459
 
  • R.L. Parise, O.R. Bagnato, R. Defavari, M.W.A. Feitosa, F.R. Francisco, D.Y. Kakizaki, R.D. Ribeiro
    LNLS, Campinas, Brazil
  
  LNLS has been com­mis­sion­ing Sir­ius, a 4th-gen­er­a­tion syn­chro­tron light source. The com­mis­sion­ing of the beam­lines has been mainly done by using pla­nar un­du­la­tor, which uses in-house built alu­minum vac­uum cham­bers with ul­tra-high vac­uum tight bimetal­lic flanges. In order to man­u­fac­ture these flanges, dif­fu­sion bonded joints of AA6061 alu­minum alloy to AISI 316LN stain­less steel were de­vel­oped. Dif­fu­sion bond­ing was car­ried out at 400-500°C for 45-60 min, ap­ply­ing a load of 9.8MPa in a vac­uum fur­nace. Also, the sur­face prepa­ra­tion for Al and SS was in­ves­ti­gated. SEM ob­ser­va­tion re­vealed that an 1-3 µm re­ac­tion layer was formed at the AA6061/Ni-plated in­ter­face. The in­ter­metal­lic com­pound Al3Ni was iden­ti­fied in the re­ac­tion layer. The ob­tained Al/SS joints showed mean ul­ti­mate strength of 84 MPa, with the frac­ture oc­cur­ring in the Al/re­ac­tion layer in­ter­face. Bake-out cy­cles fol­lowed by leak tests were car­ried out to val­i­date the process and ap­prove their use on the pla­nar un­du­la­tor vac­uum cham­bers. Two un­du­la­tors with Al/SS flanges have been in­stalled and are under op­er­a­tion in the stor­age ring.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB334  
About • paper received ※ 17 May 2021       paper accepted ※ 17 June 2021       issue date ※ 31 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)