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Suganuma, Kazuaki; Shimoyama, Nobuyoshi*; Yonekyu, Naoyuki*; Taki, Yukina*; Kinsho, Michikazu
Proceedings of 12th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.686 - 688, 2015/09
no abstracts in English
Kamiya, Junichiro; Takayanagi, Tomohiro; Kawakubo, Toshimichi*; Murasugi, Shigeru*; Nakamura, Eiji*
IEEE Transactions on Applied Superconductivity, 16(2), p.168 - 171, 2006/06
Times Cited Count：5 Percentile：29.26(Engineering, Electrical & Electronic)The kicker magnets are installed in the extraction section of the RCS (Rapid Cycling Synchrotron) in J-PARC (Japan Proton Accelerator Research Complex) facility. They extract the 3GeV proton beam to a downstream beam transport line. In order to achieve 1MW beam power, kicker is required to have a wide aperture, UHV (ultra-high vacuum) in its chamber, and uniformity of magnetic field. In this paper, we will introduce the specification of the extraction kicker system in the RCS, and report countermeasure against the technical challenge described above.
Kamiya, Junichiro; Ueno, Tomoaki*; Takayanagi, Tomohiro
IEEE Transactions on Applied Superconductivity, 16(2), p.1362 - 1365, 2006/06
Times Cited Count：5 Percentile：33.55(Engineering, Electrical & Electronic)Kicker magnets in J-PARC RCS are being constructed at JAERI (Japan Atomic Energy Research Institute) as the extraction pulse magnet. It is designed to have a large aperture in order to accept the maximum beam power 1MW. Therefore the impedance mismatch and fringe field have the large effect on distortion of a flatness of the kicker magnetic field. We examined their effect by the simulation and measurement, and contrived to improve the field flatness. In this paper, we present the features of the RCS kicker systems, describe the magnetic field measurement and improvement, and briefly introduce the field mapping which we are performing now.
Kamiya, Junichiro; Takayanagi, Tomohiro; Kawakubo, Toshimichi*; Murasugi, Shigeru*; Nakamura, Eiji*
Proceedings of 2005 Particle Accelerator Conference (PAC '05) (CD-ROM), p.1009 - 1011, 2005/00
The kicker magnets are installed in the vacuum chamber at the extraction section of the RCS (Rapid Cycling Synchrotron) in J-PARC (Japan Proton Accelerator Research Complex) facility. They kick the 3GeV proton beam to the extraction septum magnets followed by a downstream beam transport line. The RCS is designed to achieve the 1MW beam power with minimum loss. Therefore, the kicker is required to have a wide aperture, UHV (ultra-high vacuum) in its chamber, and uniformity of magnetic field. The wide aperture requires large exciting current and the use environment of the thyratron is very tough. Therefore aging run was found out to be needed. And the uniformity of the magnetic field was improved by changing length of the conductors. In order to achieve the UHV, we succeeded in reducing outgas from components of the magnet. In this paper, we will introduce the specification of the extraction kicker system in the RCS, and report countermeasure against the technical challenge described above.
Kamiya, Junichiro; Takayanagi, Tomohiro; Nakamura, Eiji*; Shimada, Taihei; Suzuki, Hiromitsu; Kawakubo, Toshimichi*; Shigaki, Kenta*; Murasugi, Shigeru*; Tazawa, Shichiro*
Dai-14-Kai Kasokuki Kagaku Kenkyu Happyokai Hokokushu, p.84 - 86, 2003/11
no abstracts in English
