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Design of RCS magnets for J-PARC 3-GeV synchrotron

J-PARC 3-GeVシンクロトロン電磁石の設計

谷 教夫  ; 安達 利一*; 五十嵐 進*; 渡辺 泰広  ; 染谷 宏彦*; 佐藤 皓*; 木代 純逸

Tani, Norio; Adachi, Toshikazu*; Igarashi, Susumu*; Watanabe, Yasuhiro; Someya, Hirohiko*; Sato, Hikaru*; Kishiro, Junichi

J-PRAC 3GeV陽子シンクロトロンは25Hzの速い繰り返しで電磁石を励磁するシンクロトロンである。1MWの大強度ビームを達成するために大口径の電磁石が必要とされている。大口径の電磁石は、従来の電磁石と比べて大きな漏れ磁場が発生することが予想される。本論文では、RCS電磁石の設計手法を説明し、偏向電磁石と四極電磁石の磁場計算と電磁石の各構成要素について報告する。

The 3-GeV synchrotron proposed in the JAERI/KEK Joint Project (J-PARC) is a rapid-cycling synchrotron (RCS), which accelerates a high-intensity proton beam from 400-MeV to 3-GeV at a repetition rate of 25-Hz. The 3-GeV synchrotron is used to produce pulsed spallation neutrons and muons. It also works as an injector for a 50-GeV synchrotron. The 3-GeV synchrotron consists of 24 dipole magnets, 60 quadrupole magnets, 18 sextupole magnets and 52 steering magnets. Since the magnets for the 3-GeV synchrotron are required to have a large aperture in order to realize the large beam power of 1 MW, there is a larger fringe field at a pole end than a usual synchrotron magnet. Therefore, it is important to estimate the magnetic field and the effect of multipole component at the fringe field. In this paper, we report the results of the field calculation and mechanical design of RCS magnets.

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パーセンタイル:60.91

分野:Engineering, Electrical & Electronic

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