Author: Keir, J.J.
Paper Title Page
TUPO014 TRIUMF ISAC LINAC Developments and Upgrades 355
 
  • Z.T. Ang, T. Au, Y. Bylinskii, K. Fong, J.J. Keir, D. Lang, R.E. Laxdal, R. Leewe, B.S. Waraich, Z.Y. Yao, Q. Zheng, V. Zvyagintsev
    TRIUMF, Vancouver, Canada
  
  TRI­UMF ISAC ac­cel­er­a­tor com­plex is in con­sists of ISAC-I room tem­per­a­ture linac and ISAC-II su­per­con­duct­ing linac struc­ture. ISAC-I linac has sev­en­teen RF sys­tems in op­er­a­tion for about twenty years, and ISAC-II linac has forty su­per­con­duct­ing QWR RF cav­i­ties in op­er­a­tion for more than ten years. A small ISAC booster 3-gap struc­ture at 11.78 MHz lo­cated in up­stream of RFQ has been de­signed and in­stalled for en­ergy match­ing to RFQ. A slid­ing mode ex­tremum seek­ing con­trol for LLRF con­trol was de­vel­oped and im­ple­mented in op­er­a­tion. Six of DTL sys­tems have been work­ing in the con­trol mode. Two of them had been com­mis­sion­ing and in op­er­a­tion one and half year re­li­ably. RFQ, two more DTL sys­tem, HEBT re­buncher and DSB buncher sys­tem will be up­graded in the slid­ing mode con­trol soon. Twenty ISAC-II SBC su­per­con­duct­ing cav­ity RF power am­pli­fiers were up­graded from YV-229 tri­ode tube am­pli­fier into solid state am­pli­fier(SSA). The pro­to­type and four SSAs have been com­mis­sioned in 2017 and in op­er­a­tion suc­cess­fully. The rest of 16 SSA have been tested in RF lab and in­stalled for op­er­a­tion at the mid of this year.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO014  
About • paper received ※ 04 September 2018       paper accepted ※ 19 September 2018       issue date ※ 18 January 2019  
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TUPO020 Microphonics Investigation of ARIEL e-Linac Cryomodules 370
 
  • Y. Ma, K. Fong, M. Keikha, J.J. Keir, D. Kishi, S.R. Koscielniak, D. Lang, R.E. Laxdal, R.R. Nagimov, Z.Y. Yao, Q. Zheng, V. Zvyagintsev
    TRIUMF, Vancouver, Canada
  • L. Lilje
    DESY, Hamburg, Germany
  
  Now the stage of the 30MeV por­tion of ARIEL (The Ad­vanced Rare Iso­tope Lab­o­ra­tory) e-Linac is under com­mis­sion­ing which in­cludes an in­jec­tor cry­omod­ule (ICM) and the 1st ac­cel­er­a­tor cry­omod­ule (ACM1) with two cav­i­ties con­fig­u­ra­tion. In this paper, the progress of the mi­cro­phon­ics in­ves­ti­ga­tion and sup­pres­sion of ICM and ACM1 is pre­sented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO020  
About • paper received ※ 12 September 2018       paper accepted ※ 20 September 2018       issue date ※ 18 January 2019  
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TUPO039 Tests of the Balloon Single Spoke Resonator 417
TUOP07   use link to see paper's listing under its alternate paper code  
 
  • Z.Y. Yao, J.J. Keir, D. Kishi, D. Lang, R.E. Laxdal, H. Liu, Y. Ma, B. Matheson, B.S. Waraich, Q. Zheng, V. Zvyagintsev
    TRIUMF, Vancouver, Canada
  
  A bal­loon vari­ant of the sin­gle spoke res­onator (SSR) has been de­signed, fab­ri­cated and tested. The cav­ity is the SSR1 pro­to­type for the Rare Iso­tope Sci­ence Pro­ject (RISP) in Korea. It is specif­i­cally de­signed to re­duce the like­li­hood of mul­ti­pact­ing bar­ri­ers near the op­er­at­ing point. A sys­tem­atic mul­ti­pact­ing study leads to a novel geom­e­try, a spher­i­cal cav­ity with re-en­trant irises and a spoke. Other than elim­i­nat­ing mul­ti­pact­ing around op­er­a­tional gra­di­ent, the bal­loon shape also pro­vides com­pet­i­tive RF pa­ra­me­ters and ro­bust me­chan­i­cal struc­ture. Cryo­stat cold tests demon­strated cav­ity per­for­mance on each de­sign as­pect. The cold tests will be re­ported in this paper.  
slides icon Slides TUPO039 [25.279 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO039  
About • paper received ※ 17 September 2018       paper accepted ※ 21 September 2018       issue date ※ 18 January 2019  
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TUPO040 Tests of Multi-frequency Coaxial Resonators 420
 
  • Z.Y. Yao, J.J. Keir, P. Kolb, A. Kong, R.E. Laxdal, B. Matheson, E. Thoeng, B.S. Waraich, Q. Zheng, V. Zvyagintsev
    TRIUMF, Vancouver, Canada
  
  A sig­nif­i­cant issue in low beta res­onators is medium field Q-slope (MFQS) at 4K. To study the MFQS and the field de­pen­dence of sur­face re­sis­tance in low beta res­onators, a quar­ter-wave res­onator (QWR) and a half-wave res­onator (HWR) were de­signed to be tested at in­te­ger har­monic fre­quen­cies of 200MHz, and up to 1.2GHz. A se­ries of chem­istry and heat treat­ments are pro­posed to these cav­i­ties. A sys­temic study on the sur­face re­sis­tance of the coax­ial res­onators as­so­ci­at­ing with post-pro­cess­ing, RF field, and fre­quency is in progress. The cav­i­ties were de­signed and fab­ri­cated. The cold test re­sults will be dis­cussed in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO040  
About • paper received ※ 17 September 2018       paper accepted ※ 20 September 2018       issue date ※ 18 January 2019  
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