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Hatakeyama, S.

Paper Title Page
WEPEB005 Magnet Pattern Control System of the J-PARC Main Ring 2692
 
  • J. Takano, T. Koseki, S. Nakamura, T. Toyama, N. Yamamoto
    J-PARC, KEK & JAEA, Ibaraki-ken
  • S. Hatakeyama
    JAEA/J-PARC, Tokai-mura
  • K. Niki, M. Tomizawa, S. Yamada
    KEK, Ibaraki
  
 

In the J-PARC Main Ring (MR), the bending, quadrupole, sextupole, and steering magnets can be controlled on the operating interfaces (OPI). The optics parameters for all magnets are calculated by using SAD, and are converted to BL tables (ex: 2000 points for a steering magnet) for each power supplies. The BL tables are made from the parameters of optics, pattern timing, and beam energy at flat bottom and flat top. For MR beam studies, the BL tables are adjustable with offset and factor. This system is useful for COD correction, beta function measurement, aperture survey, and slow extraction. In this proceeding, the structure of the magnet control system and OPIs for beam studies will be shown.

  
WEPEB007 The Data Acquisition System of Beam Position Monitors in J-PARC Main Ring 2698
 
  • S. Hatakeyama, N. Hayashi
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  • D.A. Arakawa, Y. Hashimoto, S. Hiramatsu, J.-I. Odagiri, M. Tejima, M. Tobiyama, T. Toyama, N. Yamamoto
    KEK, Ibaraki
  • K. Hanamura
    MELCO SC, Tsukuba
  • K. Satou
    J-PARC, KEK & JAEA, Ibaraki-ken
  
 

The Data Acquisition System of Beam Position Monitors(BPMs) in J-PARC Main Ring are consist of 186 Linux-based Data Processing Cirquits(BPMCs) and 12 EPICS IOCs. They are important tool to see the COD and turn-by-turn beam positions. This report describes the process of the data reconstruction which include how the various calibration constants are applied.

  
WEPEB065 Beam Loss of J-PARC Rapid Cycling Synchrotron at Several Hundred kW Operation 2842
 
  • K. Yamamoto, H. Harada, S. Hatakeyama, N. Hayashi, H. Hotchi, P.K. Saha, M. Yoshimoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  • R. Saeki
    KEK/JAEA, Ibaraki-Ken
  
 

A 3GeV Rapid-Cycling Synchrotron (RCS) in Japan Proton Accelerator Research Complex (J-PARC) has continuously provided more than 100kW proton beam to the Neutron target since October 2009. And we also successfully accelerated 300kW beam for one hour on December 10th by way of trial. We found some problems through these experiences. We report those problems and the residual dose in such high intensity operation.

  
MOPE012 Performance of the Main Ring BPM during the Beam Commissioning at J-PARC 981
 
  • T. Toyama, D.A. Arakawa, S. Hiramatsu, S. Igarashi, S. Lee, H. Matsumoto, J.-I. Odagiri, M. Okada, M. Tejima, M. Tobiyama
    KEK, Ibaraki
  • K. Hanamura, S. Hatakeyama
    MELCO SC, Tsukuba
  • Y. Hashimoto, K. Satou, J. Takano
    J-PARC, KEK & JAEA, Ibaraki-ken
  • N. Hayashi
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  
 

Experiences of operating BPM's during beam commissioning at the J-PARC MR are reported. The subjects are: (1) bug report, statistics and especially the effect of a beam duct step, (2) position resolution estimation (<30 micrometers with 1 sec averaging), (3) beam based alignment.