Keyword: ISAC
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TUP19 First Tests of Model-Based Linac Phasing in ISAC-II cavity, linac, controls, solenoid 113
 
  • S. Kiy, R.A. Baartman, O.K. Kester, O. Shelbaya
    TRIUMF, Vancouver, Canada
  
  As the e-linac and ARIEL fa­cil­i­ties at TRI­UMF progress, the im­pend­ing com­plex­ity of op­er­at­ing three si­mul­ta­ne­ous rare ion beams (RIBs) ap­proaches. To help pre­pare for this, a frame­work for the de­vel­op­ment of High Level Ap­pli­ca­tions has been con­stucted, upon which mul­ti­ple av­enues for im­prove­ment to­wards model-based and au­to­mated tun­ing are being pur­sued. Along one of these av­enues, the 40-cav­ity su­per­con­duct­ing ISAC-II heavy ion linac has been stud­ied and mod­elled in the en­ve­lope code tran­soptr. This has al­lowed for real-time in­te­gra­tion through the on-axis fields, fit­ting focal strengths of so­le­noids to achieve de­sired beam waists, and cal­cu­la­tion of nec­es­sary cav­ity phases to achieve a de­sired out­put en­ergy for given input beam pa­ra­me­ters. Ini­tial tests have been com­pleted, suc­cess­fully phas­ing up to 37 cav­i­ties using the tran­soptr model and achiev­ing a final out­put en­ergy within 1% of the ex­pected while main­tain­ing nom­i­nal (>90%) trans­mis­sion. A sum­mary of the cal­i­bra­tion of the model to the ma­chine is given, fol­lowed by re­sults of the phas­ing tests and an out­look to­wards fu­ture im­prove­ments.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP19  
About • Received ※ 26 June 2022 — Revised ※ 01 July 2022 — Accepted ※ 10 August 2022 — Issue date ※ 29 September 2022
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