Author: Iwashita, Y.
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WE1AA05 The Muon Linac Project at J-PARC 636
 
  • Y. Kondo, Y. Fuwa, R. Kitamura, K. Moriya, T. Takayanagi
    JAEA/J-PARC, Tokai-mura, Japan
  • S. Bae, H. Choi, S. Choi, B. Kim, H.S. Ko
    SNU, Seoul, Republic of Korea
  • E. Cicek, H. Ego, Y. Fukao, K. Futatsukawa, N. Kawamura, T. Mibe, Y. Miyake, S. Mizobata, M. Otani, N. Saito, K. Shimomura, T. Yamazaki, M. Yoshida
    KEK, Ibaraki, Japan
  • K. Hasegawa
    QST Rokkasho, Aomori, Japan
  • N. Hayashizaki
    Research Laboratory for Nuclear Research, Tokyo Institute of Technology, Tokyo, Japan
  • T. Iijima, Y. Sue, K. Sumi
    Nagoya University, Graduate School of Science, Chikusa-ku, Nagoya, Japan
  • H. Iinuma, Y. Nakazawa
    Ibaraki University, Ibaraki, Japan
  • K. Inami, K. Suzuki, M. Yotsuzuka
    Nagoya University, Nagoya, Japan
  • K. Ishida
    RIKEN Nishina Center, Wako, Japan
  • Y. Iwashita
    Kyoto ICR, Uji, Kyoto, Japan
  • T. Morishita
    JAEA/LINAC, Ibaraki-ken, Japan
  • G.P. Razuvaev
    Budker INP & NSU, Novosibirsk, Russia
  • Y. Takeuchi, J. Tojo
    Kyushu University, Fukuoka, Japan
  • E. Won
    Korea University, Seoul, Republic of Korea
  • H.Y. Yasuda
    University of Tokyo, Tokyo, Japan
  
  The muon linac pro­ject for the pre­cise mea­sure­ment of the muon anom­alous mag­netic and elec­tric di­pole mo­ments, which is cur­rently one of the hottest is­sues of the el­e­men­tary par­ti­cle physics, is in progress at J-PARC. The muons from the J-PARC muon fa­cil­ity are once cooled to room tem­per­a­ture, then ac­cel­er­ated up to 212 MeV with a nor­mal­ized emit­tance of 1.5 pi mm mrad and a mo­men­tum spread of 0.1%. Four types of ac­cel­er­at­ing struc­tures are adopted to ob­tain the ef­fi­cient ac­cel­er­a­tion with a wide beta range from 0.01 to 0.94. The pro­ject is mov­ing into the con­struc­tion phase. They al­ready demon­strated the re-ac­cel­er­a­tion scheme of the de­cel­er­ated muons using a 324-MHz RFQ in 2017. The high-power test of the 324-MHz In­ter­dig­i­tal H-mode (IH) DTL using a pro­to­type cav­ity will be per­formed in 2021. The fab­ri­ca­tion of the first mod­ule of 14 mod­ules of the 1296-MHz Disk and Washer (DAW) CCL will be done to con­firm the pro­duc­tion process. More­over, the final de­sign of the trav­el­ling wave ac­cel­er­at­ing struc­ture for the high beta re­gion is also pro­ceed­ing. In this pre­sen­ta­tion, the re­cent progress to­ward the re­al­iza­tion of the world first muon linac will be pre­sented.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-WE1AA05  
About • Received ※ 14 August 2022 — Revised ※ 21 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 16 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPORI15 Update of Adjustable PMQ Lens 262
 
  • Y. Iwashita
    Kyoto University, Research Reactor Institute, Osaka, Japan
  • Y. Fuwa
    JAEA/J-PARC, Tokai-mura, Japan
  • T. Hosokai
    ISIR, Osaka, Japan
  • D. Oumbarek Espinos
    Osaka University, Graduate School of Engineering, Osaka, Japan
  
  Gluck­stern’s ad­justable per­ma­nent mag­net quadru­pole (PMQ) lens based on five rings is re­vis­ited to achieve a com­pact fo­cus­ing sys­tem for laser-ac­cel­er­ated beams. The first pro­to­type was fab­ri­cated for bore di­am­e­ter of 50 mm. The in­te­grated gra­di­ent was up to 6.8 T. A new PMQ with a bore di­am­e­ter of 25 mm is under fab­ri­ca­tion based on the same geom­e­try. While the first pro­to­type unit was de­vel­oped for the final focus mag­net of the ILC, the sec-ond unit is the first dou­blet el­e­ment for laser-ac­cel­er­ated elec­tron beam fo­cus­ing to be com­bined with this first unit. The cur­rent sta­tus of the de­vel­op­ment is re­ported.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPORI15  
About • Received ※ 01 September 2022 — Revised ※ 03 September 2022 — Accepted ※ 05 September 2022 — Issue date ※ 15 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPORI08 End-to-End Simulations and Error Studies of the J-PARC Muon Linac 562
 
  • Y. Takeuchi, J. Tojo, T. Yamanaka
    Kyushu University, Fukuoka, Japan
  • E. Cicek, H. Ego, K. Futatsukawa, N. Kawamura, T. Mibe, M. Otani, N. Saito, T. Yamazaki
    KEK, Ibaraki, Japan
  • H. Iinuma, Y. Nakazawa
    Ibaraki University, Ibaraki, Japan
  • Y. Iwashita
    Kyoto University, Research Reactor Institute, Osaka, Japan
  • R. Kitamura, Y. Kondo, T. Morishita
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • Y. Sato
    Niigata University, Niigata, Japan
  • Y. Sue, K. Sumi, M. Yotsuzuka
    Nagoya University, Graduate School of Science, Chikusa-ku, Nagoya, Japan
  • H.Y. Yasuda
    University of Tokyo, Tokyo, Japan
  
  A muon linac is under de­vel­op­ment for fu­ture muon ’’’ 2/EDM ex­per­i­ments at J-PARC. The linac pro­vides a 212 MeV muon beam to an MRI-type com­pact stor­age ring. Af- ter the ini­tial ac­cel­er­a­tion using the elec­tro­sta­tic field cre­ated by mesh and cylin­dri­cal elec­trodes, the muons are ac­celer- ated using four types of ra­dio-fre­quency ac­cel­er­a­tors. To val­i­date the linac de­sign as a whole, end-to-end sim­u­la­tions were per­formed using Gen­eral Par­ti­cle Tracer. In ad­di­tion, error stud­ies is on­go­ing to in­ves­ti­gate the ef­fects on beam and spin dy­nam­ics of var­i­ous er­rors in the ac­cel­er­a­tor com- po­nents and input beam dis­tri­b­u­tion. This paper de­scribes the pre­lim­i­nary re­sults of the end-to-end sim­u­la­tions and error stud­ies.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI08  
About • Received ※ 24 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 12 October 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)