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2012•Progress of Theoretical and Experimental PhysicsOpen access

Beam commissioning and operation of the J-PARC main ring synchrotron

Tadashi Koseki, Y. Arakaki, Yong Ho Chin, Keigo Hara, K. Hasegawa, Y. Hashimoto, Yoichiro Hori, S. Igarashi, K. Ishii, N. Kamikubota, Takuro Kimura, K. Koseki, Kuanjyun Fan, C. Kubota, Y. Kuniyasu, Yoshinori Kurimoto, Seishu Lee, Hiroshi Matsumoto, Alexander Molodozhentsev, Yuichi Morita, Shigeru Murasugi, R. Muto, F. Naito, Hidetoshi Nakagawa, S. Nakamura, K. Niki, K. Ohmi, Chihiro Ohmori, Masashi Okada, Katsuya Okamura, T. Oogoe, Kazufumi Ooya, Kenichi Sato, Yoichi Sato, Yoshihiro Sato, Kenichirou Satou, M. Shimamoto, M. Shirakata, Hirohiko Someya, T. Sugimoto, Junpei Takano, Y. Takeda, Yoichi Takiyama, M. Tejima, Makoto Toda, Masahito Tomizawa, Takeshi Toyama, Masahiko Uota, S. Yamada, Noboru Yamamoto, Eiichi Yanaoka, Masahito Yoshii, Hiroyuki Harada, Shuichiro Hatakeyama, H. Hotchi, Masahiro Nomura, A. Schnase, Taihei Shimada, Fumihiko Tamura, Masanobu Yamamoto, Tetsushi Shimogawa

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Abstract

The slow cycling main ring synchrotron (MR) is located the furthest downstream in the J-PARC accelerator cascade.It became available for user operation in 2009 and provides high-intensity 30 GeV proton beams for various experiments on particle and nuclear physics.The MR has two beam extraction systems: a fast extraction system for beam delivery to the neutrino beam line of the Tokai-to-Kamioka (T2K) experiment and a slow extraction system for beam delivery to the hadron experimental hall.After a nine-month beam shutdown during the recovery from the Great East Japan Earthquake, the J-PARC facility resumed beam operation in December 2011.The MR delivers a 160-200 kW beam to the T2K experiment and a 3.5-6 kW beam to users in the hadron experimental hall.In this paper, a brief review of the MR and the recent status of beam operation are presented.Near-future plans for a beam intensity upgrade are also discussed.. . . . . . .

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The slow cycling main ring synchrotron (MR) is located the furthest downstream in the J-PARC accelerator cascade.It became available for user operation in 2009 and provides high-intensity 30 GeV proton beams for various experiments on particle and nuclear physics.The MR has two beam extraction systems: a fast extraction system for beam delivery to the neutrino beam line of the Tokai-to-Kamioka (T2K) experiment and a slow extraction system for beam delivery to the hadron experimental hall.After a nine-month beam shutdown during the recovery from the Great East Japan Earthquake, the J-PARC facility resumed beam operation in December 2011.The MR delivers a 160-200 kW beam to the T2K experiment and a 3.5-6 kW beam to users in the hadron experimental hall.In this paper, a brief review of the MR and the recent status of beam operation are presented.Near-future plans for a beam intensity upgrade are also discussed.. . . . . . .

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Available abstract

The slow cycling main ring synchrotron (MR) is located the furthest downstream in the J-PARC accelerator cascade.It became available for user operation in 2009 and provides high-intensity 30 GeV proton beams for various experiments on particle and nuclear physics.The MR has two beam extraction systems: a fast extraction system for beam delivery to the neutrino beam line of the Tokai-to-Kamioka (T2K) experiment and a slow extraction system for beam delivery to the hadron experimental hall.After a nine-month beam shutdown during the recovery from the Great East Japan Earthquake, the J-PARC facility resumed beam operation in December 2011.The MR delivers a 160-200 kW beam to the T2K experiment and a 3.5-6 kW beam to users in the hadron experimental hall.In this paper, a brief review of the MR and the recent status of beam operation are presented.Near-future plans for a beam intensity upgrade are also discussed.. . . . . . .

Key concepts: J-PARC, Physics, Beam (structure), Nuclear physics, Beamline, Upgrade, Synchrotron, Storage ring

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