Author: Yamazaki, T.
Paper Title Page
MOPAB195 Development of a Disk-and-Washer Cavity for the J-PARC Muon g-2/EDM Experiment 658
 
  • Y. Takeuchi, J. Tojo
    Kyushu University, Fukuoka, Japan
  • E. Cicek, K. Futatsukawa, N. Kawamura, T. Mibe, M. Otani, T. Yamazaki, M. Yoshida
    KEK, Ibaraki, Japan
  • Y. Iwashita
    Kyoto ICR, Uji, Kyoto, Japan
  • R. Kitamura, Y. Kondo, T. Morishita
    JAEA/J-PARC, Tokai-mura, Japan
  • Y. Nakazawa
    Ibaraki University, Hitachi, Ibaraki, Japan
  • N. Saito
    J-PARC, KEK & JAEA, Ibaraki-ken, 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
  
  At J-PARC, an ex­per­i­ment using muons ac­cel­er­ated by a linac is planned to mea­sure the anom­alous mag­netic mo­ment of muons and to search for the elec­tric di­pole mo­ment. A 1296 MHz disk and washer (DAW) cou­pled cav­ity linac (CCL) is being de­vel­oped for use in the mid­dle beta sec­tion of the muon linac. The DAW CCL con­sists of 14 tanks with 11 cells each. All tanks are con­nected by bridge cou­plers and elec­tro­mag­netic quadru­pole dou­blets for fo­cus­ing are in­stalled in each bridge cou­pler. The basic de­sign of the DAW cav­ity has al­ready been com­pleted, and now de­tailed cav­ity de­sign stud­ies and man­u­fac­tur­ing process stud­ies are un­der­way. In this poster, we will re­port about these stud­ies and the prepa­ra­tion sta­tus of man­u­fac­tur­ing the DAW cav­ity.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB195  
About • paper received ※ 20 May 2021       paper accepted ※ 01 June 2021       issue date ※ 23 August 2021  
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WEXB06 Development of an APF IH-DTL in the J-PARC Muon g-2/EDM Experiment 2544
 
  • Y. Nakazawa, H. Iinuma
    Ibaraki University, Hitachi, Ibaraki, Japan
  • E. Cicek, N. Kawamura, T. Mibe, M. Yoshida
    KEK, Ibaraki, Japan
  • N. Hayashizaki
    RLNR, Tokyo, Japan
  • Y. Iwata
    NIRS, Chiba-shi, Japan
  • R. Kitamura, Y. Kondo, T. Morishita
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • M. Otani, N. Saito
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
  • Y. Sue, K. Sumi, M. Yotsuzuka
    Nagoya University, Graduate School of Science, Chikusa-ku, Nagoya, Japan
  • Y. Takeuchi
    Kyushu University, Fukuoka, Japan
  • T. Yamazaki
    KEK, Tokai Branch, Tokai, Naka, Ibaraki, Japan
  • H.Y. Yasuda
    University of Tokyo, Tokyo, Japan
  
  An in­ter-dig­i­tal H-mode drift-tube linac (IH-DTL) is under de­vel­op­ment in a muon linac at the J-PARC muon g-2/EDM ex­per­i­ment. It ac­cel­er­ates muons from 0.34 MeV to 4.3 MeV at an op­er­at­ing fre­quency of 324 MHz. The cav­ity can be minia­tur­ized by in­tro­duc­ing the al­ter­na­tive phase fo­cus­ing (APF) method that en­ables trans­verse fo­cus­ing only with an E-field. The APF IH-DTL cav­ity was mod­eled by a three-di­men­sional field analy­sis, and the beam dy­nam­ics were eval­u­ated nu­mer­i­cally. The beam emit­tance was cal­cu­lated as 0.316pi and 0.189pi mm mrad in the hor­i­zon­tal and ver­ti­cal di­rec­tions, re­spec­tively. It sat­is­fies the ex­per­i­men­tal re­quire­ment. Ac­tu­ally, the field error due to the fab­ri­ca­tion er­rors and ther­mal ex­pan­sion dur­ing op­er­a­tion causes an emit­tance growth. It was eval­u­ated that the op­ti­mized tuners can sup­press the emit­tance growth to less than 10%. In this paper, the de­tailed de­sign of the APF IH-DTL in­clud­ing the tuner will be re­ported.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEXB06  
About • paper received ※ 19 May 2021       paper accepted ※ 29 July 2021       issue date ※ 20 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)