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Yamamoto, Kazami
Proceedings of 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2012) (Internet), p.6 - 10, 2012/09
The beam commissioning of the Japan Proton Accelerator Research Complex (J-PARC) started in November 2006. After that a provided beam power was increased by the beam commissioning. Just before the Great East Japan Earthquake in March 2011, the Rapid-Cycling Synchrotron (RCS) of the J-PARC provided 200kW proton beam to neutron users, and Main Ring (MR) provided 145kW proton beam to Neutrino target. However, the facilities of J-PARC were seriously damaged by the Earthquake. We completed not only the recovery work in only nine months, but also improved some devices. A beam operation after recovery work shows that those improvements enabled further high power operation. In the Linac and RCS, output power was not only reproduced but also increased to 275kW. In MR, extraction beam power in both modes (Slow extraction for Hadron experimental hall and Fast extraction for Neutrino target) were increased as well.
Harada, Hiroyuki; Hotchi, Hideaki; Saha, P. K.; Shobuda, Yoshihiro; Hayashi, Naoki; Yamamoto, Kazami; Yoshimoto, Masahiro; Tamura, Fumihiko; Yamamoto, Masanobu; Kinsho, Michikazu; et al.
Proceedings of 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2012) (Internet), p.339 - 343, 2012/09
J-PARC 3-GeV RCS has started the beam commissioning since Oct. 2007. In the beam commissioning, the beam tuning for basic parameters and high-intensity operation has been continuously performed. This presentation will describe the results of the beam-loss reduction and minimization for high-intensity operation.
Saha, P. K.; Hatakeyama, Shuichiro; Yoshimoto, Masahiro; Yamamoto, Kazami; Hotchi, Hideaki; Harada, Hiroyuki; Hayashi, Naoki
Proceedings of 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2012) (Internet), p.297 - 301, 2012/09
Hotchi, Hideaki; Harada, Hiroyuki; Hayashi, Naoki; Kinsho, Michikazu; Saha, P. K.; Shobuda, Yoshihiro; Tamura, Fumihiko; Yamamoto, Kazami; Yamamoto, Masanobu
Proceedings of 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2012) (Internet), p.68 - 72, 2012/09
The J-PARC RCS was made available for user operation in December 2008 with an output beam power of 4 kW. Since then, the output beam power of the RCS has been steadily increasing following progressions in beam tuning and hardware improvements. So far, the RCS has successfully achieved high-intensity beam trials of up to 420 kW at a low-level intensity loss of less than 1%, and the output beam power for the routine user program has been increased to 280 kW. While the current injection energy is 181 MeV, it will be upgraded to 400 MeV in 2013. After that, we are to aim at our final goal of 1 MW output beam power. In this paper, we discuss 1 MW beam operation scenario of the RCS on the basis of the numerical simulations and the experimental results obtained so far.
Maruta, Tomofumi; Ikegami, Masanori*
Proceedings of 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB 2012) (Internet), p.591 - 595, 2012/09
no abstracts in English
