A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Shirakata, M. J.

Paper Title Page
MOPAN038 Electric Power Compensation of the Large Scale Accelerator using SMES 239
  • H. Sato, t.s. Shintomi, M. J. Shirakata
    KEK, Ibaraki
  • T. Ise, Y. Miura
    Osaka University, Suita
  • S. Nomura
    RLNR, Tokyo
  Power supply for the large scale accelerator magnets draws a large amount of power from the utility network. For example, the peak active power and the dissipation power of J-PARC 50GeV synchrotron magnet power are estimated to be about 135MW and 37MW, respectively. Super Conducting Magnetic Energy Storage (SMES) is one of candidates to compensate these large load and line voltage fluctuation. Study on circuit configuration of the power supply with SMES has been continued. Present status of the R & D for the SMES system and small case experiment result will be discussed.  
TUPAN051 Design of Dynamic Collimator for J-PARC Main Ring 1505
  • M. Tomizawa, A. Y. Molodozhentsev, M. J. Shirakata
    KEK, Ibaraki
  The J-PARC main ring has a beam collimator section downstream of the injection area. The allowed beam loss is about 500 W. The beam halo during injection can be scraped by a standard collimator scheme. The beam halo can grow during the acceleration. Such a halo may cause a serious beam loss for extracted beam. A collimation during acceleration (dynamic collimator) is usefull to reduce the uncontrolable beam loss at the extraction. We will report the design and simulation of the dynamic collimation.