MC1: Circular and Linear Colliders
A03: Linear Colliders
Paper Title Page
WEPOPT023 A Design of ILC E-Driven Positron Source 1889
 
  • M. Kuriki, S. Konno, Z.J. Liptak
    HU/AdSM, Higashi-Hiroshima, Japan
  • M.K. Fukuda, T. Omori, Y. Seimiya, J. Urakawa, K. Yokoya
    KEK, Ibaraki, Japan
  • S. Kashiwagi
    Tohoku University, Research Center for Electron Photon Science, Sendai, Japan
  • H. Tajino
    HU ADSE, Hiroshima, Japan
  • T. Takahashi
    Hiroshima University, Graduate School of Science, Higashi-Hiroshima, Japan
  
  ILC is an elec­tron-positron lin­ear col­lider based on Su­per­con­duct­ing lin­ear ac­cel­er­a­tor. Lin­ear col­lider is an only so­lu­tion to re­al­inze high en­ergy elec­tron-positron col­li­sion be­yond the limit of syn­chro­tron ra­di­a­tion en­ergy loss by ring col­lid­ers. Beam cur­rent of in­jec­tor of lin­ear col­lid­ers is much larger than that of ring col­lid­ers be­cause the beam is not reusable. Pro­vid­ing an enough amount of par­ti­cles, es­pe­cially positron is a tech­ni­cal issue. In this ar­ti­cle, we pre­sent a de­sign of elec­tron dri­ven positron source for ILC. After op­ti­miza­tions, the sys­tem de­sign is es­tab­lished with an enough tech­ni­cal mar­gin, e.g. avoid­ing po­ten­tial dam­age on the pro­duc­tion tar­get.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOPT023  
About • Received ※ 20 May 2022 — Revised ※ 11 June 2022 — Accepted ※ 14 June 2022 — Issue date ※ 23 June 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPOPT024 Beam Loading Compensation of Standing Wave Linac with Off-Crest Acceleration 1893
 
  • M. Kuriki, S. Konno, Z.J. Liptak
    HU/AdSM, Higashi-Hiroshima, Japan
  • M.K. Fukuda, T. Omori, Y. Seimiya, J. Urakawa, K. Yokoya
    KEK, Ibaraki, Japan
  • S. Kashiwagi
    Tohoku University, Research Center for Electron Photon Science, Sendai, Japan
  • H. Tajino
    HU ADSE, Hiroshima, Japan
  • T. Takahashi
    Hiroshima University, Graduate School of Science, Higashi-Hiroshima, Japan
  
  In E-Dri­ven positron source of ILC, the gen­er­ated positron is cap­tured by a stand­ing wave cav­ity. Be­cause the de­cel­er­a­tion cap­ture method is em­ployed, the positron is off-crest over the linac. Be­cause the beam-load­ing is ex­pected to be more than 1A in a multi-bunch for­mat, the com­pen­sa­tion is es­sen­tial to ob­tain uni­form in­ten­sity over the pulse. A con­ven­tional method for the com­pen­sa­tion con­trol­ling the tim­ing doesn’t work be­cause RF and Beam in­duced field are in dif­fer­ent phase. In this man­u­script, we dis­cuss the com­pen­sa­tion with the off-crest ac­cel­er­a­tion case. A sim­ple phase mod­u­la­tion on the input RF is a so­lu­tion.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOPT024  
About • Received ※ 20 May 2022 — Revised ※ 10 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 16 June 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)