Author: Ebisawa, T.
Paper Title Page
TUPTB027 Cleanroom Assembly of the LIPAc Cryomodule 452
 
  • J.K. Chambrillon, P. Cara, Y. Carin, G. Duglue, H. Dzitko, D. Gex, G. Phillips, F. Scantamburlo
    Fusion for Energy, Garching, Germany
  • N. Bazin, N. Chauvin
    CEA-DRF-IRFU, France
  • Y. Carin, D. Gex, K. Masuda, F. Scantamburlo, M. Sugimoto
    IFMIF/EVEDA, Rokkasho, Japan
  • T. Ebisawa, K. Hasegawa, K. Kondo, K. Masuda, M. Sugimoto, T.Y. Yanagimachi
    QST Rokkasho, Aomori, Japan
  • D. Jimenez-Rey, J. Mollá, I. Podadera
    CIEMAT, Madrid, Spain
  • E. Kako, H. Sakai
    KEK, Ibaraki, Japan
  • W.-D. Möller
    Private Address, Hamburg, Germany
  
  In com­ple­ment to the de­vel­op­ment ac­tiv­i­ties for fu­sion re­ac­tors (JT-60SA & ITER), Fu­sion for En­ergy con­tributes to the R&D for ma­te­r­ial char­ac­ter­i­sa­tion fa­cil­i­ties. LIPAc is the tech­ni­cal demon­stra­tor for the pro­duc­tion and ac­cel­er­a­tion of a D+ beam that will be used for neu­tron pro­duc­tion by nu­clear strip­ping re­ac­tion on a liq­uid Li tar­get. Since its first beam in 2014, the LIPAc con­struc­tion and com­mis­sion­ing con­tin­ues and will be con­cluded with the cry­omod­ule in­stal­la­tion, aim­ing for beam val­i­da­tion at nom­i­nal power. The cry­omod­ule as­sem­bly, started in March 2019, was paused due to weld­ing is­sues on the so­le­noid bel­lows. The slow pump­ing group used for the clean­room as­sem­bly also needed im­prove­ment to over­come he­lium con­t­a­m­i­na­tion. Two and half years were de­voted to the pump­ing im­prove­ment and, re­pair, cold tests and high pres­sure rins­ing of the so­le­noids. In Au­gust 2022, the clean­room as­sem­bly re­sumed with the mount­ing of all power cou­plers to the SRF cav­i­ties. De­spite good progress, the as­sem­bly had to be paused again to fix leaks on dif­fer­ent vac­uum com­po­nents and a so­le­noid BPM port. This paper pre­sents the is­sues faced and their so­lu­tions along the cold mass as­sem­bly.  
poster icon Poster TUPTB027 [2.384 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-SRF2023-TUPTB027  
About • Received ※ 15 June 2023 — Revised ※ 24 June 2023 — Accepted ※ 29 June 2023 — Issue date ※ 16 July 2023
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TUPTB031 Operational Consideration in the LIPAc SRF with Potential Solenoid Failure Modes 467
 
  • T. Ebisawa, K. Hasegawa, A. Kasugai, K. Kondo, K. Masuda
    QST Rokkasho, Aomori, Japan
  • Y. Carin, H. Dzitko, D. Gex, G. Phillips
    F4E, Germany
  • J.K. Chambrillon
    Fusion for Energy, Garching, Germany
  • N. Chauvin
    CEA-DRF-IRFU, France
  • E. Kako, H. Sakai
    KEK, Ibaraki, Japan
  
  The com­mis­sion­ing of LIPAc (Lin­ear IFMIF Pro­to­type Ac­cel­er­a­tor) is on­go­ing at Rokkasho in­sti­tute of QST for the en­gi­neer­ing val­i­da­tion of the ac­cel­er­a­tor sys­tem up to 9 MeV/125 mA. Sev­eral SRF cry­omod­ules will be re­quired for IFMIF to ac­cel­er­ate deuterons from 5 MeV to 40 MeV. The pro­to­type of the first of these cry­omod­ules has been man­u­fac­tured and will be in­stalled and tested on the LIPAc. It holds the eight HWRs (Half Wave Res­onator) and RF cou­plers to ac­cel­er­ate the beam and the eight su­per­con­duct­ing so­le­noids to focus it. Dur­ing the so­le­noid HPR process, car­ried out after fix­ing weld­ing is­sues on the so­le­noid beam line bel­lows, some con­cerns ap­peared about the in­tegrity of two so­le­noids. The ex­am­i­na­tion with CT scan­ning of the so­le­noids re­vealed that one screw and a few pins had leaved their socket. Al­though it should be no crit­i­cal prob­lem, we tried the beam sim­u­la­tion with PIC code TraceWin to de­ter­mine the lo­ca­tion of so­le­noids whose im­pact will be min­i­mized to man­age in case of fail­ure of so­le­noid as mit­i­ga­tion ac­tion. This paper pre­sents the rec­om­mended lo­ca­tions of the sus­pi­cious so­le­noids in the cry­omod­ule and re­sul­tant beam con­di­tions through the beam dy­nam­ics study.  
DOI • reference for this paper ※ doi:10.18429/JACoW-SRF2023-TUPTB031  
About • Received ※ 28 June 2023 — Revised ※ 29 June 2023 — Accepted ※ 07 July 2023 — Issue date ※ 16 July 2023
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WEPWB083 Basic Design and Consideration of Li-Vapor Contamination for A-FNS SRF 773
 
  • T. Ebisawa, K. Hasegawa, A. Kasugai, M. Oyaidzu, S. Sato
    QST Rokkasho, Aomori, Japan
  • E. Kako, H. Sakai, K. Umemori
    KEK, Ibaraki, Japan
  
  The Ad­vanced Fu­sion Neu­tron Source (A-FNS) pro­ject is in pro­gress­ing in Japan, QST Rokkasho in­sti­tute. A-FNS will demon­strate a per­for­mance of the DEMO DT fu­sion re­ac­tor ma­te­r­ial. In order to per­form the test, a high in­ten­sity deuteron beam ac­cel­er­a­tor will be used to pro­duce a high flux neu­tron field which is sim­i­lar to the 14 MeV DT neu­tron. The Su­per­con­duct­ing Ra­dio-Fre­quency lin­ear ac­cel­er­a­tor (SRF) is one com­po­nent of the A-FNS ac­cel­er­a­tor sys­tem. Al­though the A-FNS ac­cel­er­a­tor sys­tem de­sign is based on the IFMIF de­sign, the im­prove­ment of some sub­sys­tem has been con­sid­er­ing by tak­ing into ac­count the lessons learnt from the LIPAc pro­ject. In order to keep a high sta­bil­ity and avail­abil­ity of the SRF per­for­mance, we plan to in­crease the num­ber of SRF cav­i­ties and cry­omod­ules con­sid­er­ing the trou­ble or degra­da­tion of the cav­ity per­for­mance and mod­ify the en­gi­neer­ing de­sign of some com­po­nents. In ad­di­tion, chang­ing of the beam trans­port line de­sign and Li vapor con­t­a­m­i­na­tion study of SRF cav­ity are con­duct­ing. In this pre­sen­ta­tion, the progress of the SRF de­sign and re­lated ac­tiv­i­ties for A-FNS in QST will be pre­sented.  
DOI • reference for this paper ※ doi:10.18429/JACoW-SRF2023-WEPWB083  
About • Received ※ 28 June 2023 — Revised ※ 29 June 2023 — Accepted ※ 30 June 2023 — Issue date ※ 17 August 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)