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Journal Articles

New injection bump power supply of the J-PARC RCS

Takayanagi, Tomohiro; Ueno, Tomoaki*; Horino, Koki; Tobita, Norimitsu; Hayashi, Naoki; Kinsho, Michikazu; Irie, Yoshiro*; Okabe, Kota; Tani, Norio; Naito, Shingo*; et al.

Proceedings of 12th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.1169 - 1174, 2015/09

The new injection bump power supply for the shift bump magnet of the beam injection sub-systems at the J-PARC (Japan Proton Accelerator Research Complex) 3-GeV RCS (Rapid Cycling Synchrotron) has been developed and manufactured. The power capacity of the new power supply was more than doubled with the injection beam energy upgrading of the LINAC (Linear Accelerator) from 181 MeV to 400 MeV. Furthermore, the low ripple noise on the output current was required to prevent the resonance of the RF shield loop at the ceramic duct with the excitation magnetic field. The power supply newly adopted a capacitor commutation method to form the trapezoid waveform pattern (bump waveform). This paper reports characteristic about the new power supply.

Journal Articles

Positron related analysis of $$^{13}$$N-nitrate in transgenic rice plant over-expressing nitrate transporter

Sato, Daisuke*; Mori, Mari*; Katayama, Hisato*; Kitamura, Harushige*; Kawai, Toshihiko*; Fujimaki, Shu; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Matsuhashi, Shimpei; et al.

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 128, 2007/02

no abstracts in English

Journal Articles

High-temperature and high-pressure ${it in situ}$ SCC device for synchrotron radiation diffraction experiments and application using an austenitic stainless steel

Yamamoto, Atsushi*; Nakahigashi, Shigeo*; Terasawa, Michitaka*; Mitamura, Toru*; Akiniwa, Yoshiaki*; Yamada, Takayuki*; Liu, L.*; Shobu, Takahisa; Tsubakino, Harushige*

Journal of Synchrotron Radiation, 13(1), p.14 - 18, 2006/01

 Times Cited Count:5 Percentile:29.82(Instruments & Instrumentation)

Suppressing the stress corrosion cracking (SCC) by reducing the carbon content in austenitic stainless steels is apparently not effective on core shrouds used in boiling water reactors in Japan: trans-granular cracking was found in the shrouds. To clarify the mechanism of the cracking, in situ stress measurements on specimens under stretched conditions in hot water have been attempted in the present study. In situ experiments have been carried out at SPring-8. The SUS316L steel specimen was placed in the in situ device. Sapphire windows were used for the light path in the device. A sufficient diffracted beam intensity was obtained through two sapphire windows and water. The side-inclination method was used for measuring the stress exerted on the specimen. A 2 $$theta$$ sin$$^{2}$$$$psi$$ plot showed that a tensile stress was induced. The measured stress value is considered to be the summation of stresses owing to pre-straining, in situ loading and residual stress owing to surface grinding.

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