Author: Natsui, T.
Paper Title Page
THMPL02 Upgrade of KEK Electron/positron Linac Control System for the Both SuperKEKB and Light Sources 1257
 
  • K. Furukawa, Y. Enomoto, H. Kaji, H. Katagiri, M. Kurashina, K. Mikawa, T. Miura, F. Miyahara, T. Natsui, I. Satake, M. Satoh, Y. Seimiya, H. Sugimura, T. Suwada
    KEK, Ibaraki, Japan
 
  KEK in­jec­tor linac has de­liv­ered elec­trons and positrons for par­ti­cle physics and pho­ton sci­ence ex­per­i­ments for more than 30 years. It is being up­graded for the Su­perKEKB pro­ject, which aims at a 40-fold in­crease in lu­mi­nos­ity over the pre­vi­ous pro­ject of KEKB, in order to in­crease our un­der­stand­ing of flavour physics. This pro­ject re­quires ten-times smaller emit­tance and five-times larger cur­rent in in­jec­tion beam from the in­jec­tor. And many hard­ware com­po­nents are being tested and in­stalled. Even dur­ing the 6-year up­grade, it was re­quested to in­ject beams into light sources stor­age rings of PF and PF-AR. Fur­ther­more, the beam de­mand­ing ap­proaches from those stor­age rings are dif­fer­ent. Su­perKEKB would de­mand high­est per­for­mance, and un­sched­uled in­ter­rup­tion may be ac­cept­able if the per­for­mance would be im­proved. How­ever, light sources ex­pect a sta­ble op­er­a­tion with­out any un­sched­uled break, mainly be­cause most users run ex­per­i­ments for a short pe­riod. In order to deal with the both re­quire­ments sev­eral mea­sures are taken for op­er­a­tion, con­struc­tion and main­te­nance strat­egy in­clud­ing si­mul­ta­ne­ous top-up in­jec­tions.  
slides icon Slides THMPL02 [2.421 MB]  
poster icon Poster THMPL02 [6.998 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPL02  
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THPHA064 Control System Status of SuperKEKB Injector Linac 1522
 
  • M. Satoh, Y. Enomoto, K. Furukawa, F. Miyahara, T. Natsui, I. Satake, Y. Seimiya, H. Sugimura, T. Suwada
    KEK, Ibaraki, Japan
  • K. Hisazumi, T. Kudou, Y. Kuroda, S. Kusano, Y. Mizukawa, S. Ushimoto
    Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
  • T. Ohfusa, H.S. Saotome, M. Takagi
    Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan
 
  The Phase I beam com­mis­sion­ing of Su­perKEKB has been con­ducted from Feb­ru­ary to June in the last year. The in­jec­tor linac has suc­cess­fully de­liv­ered the elec­tron and positron beams to the Su­perKEKB main ring. The linac beam stud­ies and sub­sys­tem de­vel­op­ments are also in­ten­sively going on to­gether with the daily nor­mal beam in­jec­tion to both rings of the Su­perKEKB and two light sources. To­wards Phase II and III beam com­mis­sion­ing of Su­perKEKB, one of key is­sues is a fine beam con­trol with the new beam po­si­tion mon­i­tor read­out sys­tem, a positron cap­ture sys­tem based on the flux con­cen­tra­tor, a pulsed quadru­pole and steer­ing mag­nets, and a low emit­tance photo-cath­ode rf elec­tron source. In this paper, we re­port the con­trol sys­tem sta­tus of Su­perKEKB in­jec­tor linac to­gether with the com­mis­sion­ing re­sult of Phase I. In ad­di­tion, the im­prove­ment plant of in­jec­tor con­trol sys­tem is also men­tioned.  
poster icon Poster THPHA064 [0.808 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA064  
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