Author: Kudou, T.
Paper Title Page
THMPA07 Improvement of Temperature and Humidity Measurement System for KEK Injector Linac 1323
 
  • I. Satake, M. Satoh, T. Suwada, Y. Yano
    KEK, Ibaraki, Japan
  • T. Kudou, S. Kusano, Y. Mizukawa
    Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
 
  A tem­per­a­ture and hu­mid­ity mea­sure­ment sys­tem at the KEK in­jec­tor linac con­sists of 26 data log­gers con­nected to around 700 tem­per­a­ture and hu­mid­ity sen­sors, one EPICS IOC, and CSS archiver. CSS archiver en­gine re­trieves the tem­per­a­ture and hu­mid­ity data mea­sured by the data log­gers via Eth­er­net. These data are fi­nally stored into the Post­greSQL based data­base. A new server com­puter has been re­cently uti­lized for the archiver of CSS ver­sion 4 in­stead of ver­sion 3. It can dras­ti­cally im­prove the speed per­for­mance for re­triev­ing the archived data. The long-term beam sta­bil­ity of linac is get­ting a quite im­por­tant fig­ure of merit since the si­mul­ta­ne­ous top up in­jec­tion is re­quired for the in­de­pen­dent four stor­age rings to­ward the Su­perKEKB Phase II op­er­a­tion. For this rea­son, we de­vel­oped a new archiver data man­age­ment ap­pli­ca­tion with a good op­er­abil­ity. Since it can bring the op­er­a­tors a quick de­tec­tion of anom­alous be­hav­ior of tem­per­a­ture and hu­mid­ity data re­sult­ing in the de­te­ri­o­ra­tion of beam qual­ity, the im­proved tem­per­a­ture and hu­mid­ity mea­sure­ment sys­tem can be much ef­fec­tive. We will re­port the de­tailed sys­tem de­scrip­tion and prac­ti­cal ap­pli­ca­tion to the daily beam op­er­a­tion.  
slides icon Slides THMPA07 [2.221 MB]  
poster icon Poster THMPA07 [1.892 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPA07  
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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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