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Sakanaka, Shogo*; Ago, Tomonori*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; Harada, Kentaro*; Hiramatsu, Shigenori*; Honda, Toru*; et al.
Proceedings of 11th European Particle Accelerator Conference (EPAC '08) (CD-ROM), p.205 - 207, 2008/06
Future synchrotron light sources based on the energy-recovery linacs (ERLs) are expected to be capable of producing super-brilliant and/or ultra-short pulses of synchrotron radiation. Our Japanese collaboration team is making efforts for realizing an ERL-based hard X-ray source. We report recent progress in our R&D efforts.
pollen with 
-rays and carbon ionsNaito, Ken*; Kusaba, Makoto*; Shikazono, Naoya; Takano, Toshiya*; Tanaka, Atsushi; Tanisaka, Takatoshi*; Nishimura, Minoru*
Genetics, 169(2), p.881 - 889, 2005/02
Times Cited Count：108 Percentile：87.94(Genetics & Heredity)no abstracts in English
Kondo, Yasuhiro; Akikawa, Hisashi; Anami, Shozo*; Asano, Hiroyuki*; Fukui, Yuji*; Igarashi, Zenei*; Ikegami, Kiyoshi*; Ikegami, Masanori*; Ito, Takashi; Kawamura, Masato*; et al.
Proceedings of 1st Annual Meeting of Particle Accelerator Society of Japan and 29th Linear Accelerator Meeting in Japan, p.156 - 158, 2004/08
A commissioning of the J-PARC linac DTL1 is now under way at KEK. A 30mA H
beam was accelerated to 19.7-MeV, and 100% transmission was obtained with a 20-msec-pulse-width and 12.5-Hz-repetition beam. In this paper, present status of the DTL1 commissioning and preliminary results of the commissioning, such as emittance measurements, are presented.
Nakano, Hirotami*; Aono, Yoshinori*; Naito, Masanobu*; Kondo, Ryo*; Eda, Hiroshi*; Matsukawa, Makoto; Miura, Yushi
Denki Gakkai Rombunshi, D, 120D(11), p.1277 - 1282, 2000/11
no abstracts in English
Nakano, Hirotami*; Tanabe, Takeshi*; Naito, Masanobu*; Kubota, Yoshiki*; Morita, Tsuyoshi*; Kimura, Toyoaki; Matsukawa, Makoto; Miura, Yushi
Electrical Engineering in Japan, 131(4), p.1 - 10, 2000/04
Times Cited Count：8 Percentile：48.65(Engineering, Electrical & Electronic)no abstracts in English
Ikeda, Yoshitaka; Fujita, Takaaki; Hamamatsu, Kiyotaka; Ide, Shunsuke; Imai, Tsuyoshi; Isayama, Akihiko; Iwase, Makoto; Kasugai, Atsushi; Kondoh, Takashi; Kusama, Yoshinori; et al.
AIP Conference Proceedings 485, p.279 - 287, 1999/09
no abstracts in English
*; Tanabe, Takeshi*; Naito, Masanobu*; Kubota, Yoshiki*; Morita, Tsuyoshi*; Kimura, Toyoaki; Matsukawa, Makoto; Miura, Yushi
Denki Gakkai Rombunshi, A, 119(3), p.279 - 285, 1999/03
no abstracts in English
Kamada, Yutaka; Yoshino, Ryuji; Ushigusa, Kenkichi; Neyatani, Yuzuru; Oikawa, Toshihiro; Naito, Osamu; Tokuda, Shinji; Shirai, Hiroshi; Takizuka, Tomonori; Ozeki, Takahisa; et al.
Fusion Energy 1996, Vol.1, p.247 - 258, 1997/00
no abstracts in English
Ninomiya, Hiromasa; Hosogane, Nobuyuki; Yoshino, Ryuji; Ushigusa, Kenkichi; Kamada, Yutaka; Kikuchi, Mitsuru; Kimura, Toyoaki; Kurihara, Kenichi; Tsuji, Shunji; Naito, Osamu; et al.
Kaku Yugo Kenkyu, 65(SPECIAL ISSUE), p.13 - 26, 1991/03
no abstracts in English
Homma, Toshimitsu; Kajimoto, Mitsuhiro*; Naito, Makoto*
no journal, ,
no abstracts in English
Yamaguchi, Makoto; Naito, Morimasa; Yui, Mikazu
no journal, ,
To assess the effect of alpha-radiolysis of groundwater on the surface of the radioactive waste in the HLW disposal, helium ion beam irradiation of aqueous solutions were performed containing bicarbonate, which is the major solute in groundwater. Samples were irradiated with 20 MeV 
He
ion beam from AVF cyclotron in TIARA, and hydrogen peroxide was analyzed. Hydrogen peroxide concentration increased linearly with accumulated dose, and its accumulation rate decreased by increasing solute concentration. This effect of bicarbonate ion shows the same trend as observed in the previous homogeneous kinetic model calculations.
radiation on the corrosion behavior of cabon steel in synthetic seawaterTaniguchi, Naoki; Yamaguchi, Makoto; Naito, Morimasa; Tateishi, Tsuyoshi*
no journal, ,
In order to clarify the effect of radiation on the corrosion of carbon steel overpack in HLW disposal environment, immersion test and electrochemical measurement were carried out using synthetic seawater at 80
C under radiation of 45 gy/h. In simple seawater case, the corrosion potential became noble, and the amount of corrosion and cathodic current were increased by radiation. On the other hand, little effect of radiation on the corrosion behavior was observed in the presence of bentonite.
radiation on carbon steel corrosion in compacted bentoniteTaniguchi, Naoki; Yamaguchi, Makoto; Naito, Morimasa; Tateishi, Tsuyoshi*
no journal, ,
Corrosion tests of carbon steel were performed to estimaste possible effect of groundwater radiolysis by radiation from vitrified waste on corrosion rate of carbon steel overpack in HLW repository. While average corrosion rates from weight loss increased by radiation (dose rate : 30-50 Gy/h) in synthetic seawater, accompanying increased corrosion potential and cathodic current density possibly due to contribution of radiolytically generated oxidants such as hydrogen peroxide participated in cathodic reaction. On the other hand, no apparent effect of radiation was observed for samples in compacted bentonite buffer. In addition, corrosion rates little affected by dry density of bentonite buffer. A plausible mechanism was considered to explain the absence of the radiation.
Kaminaga, Masanori; Tanimoto, Masataka; Ooka, Makoto; Ishihara, Masahiro; Kusunoki, Tsuyoshi; Naito, Akinori; Araki, Masanori
no journal, ,
JMTR in JAEA is a light water cooled tank type reactor with 50MW thermal power. From its first criticality in March 1968, the JMTR has been utilized for fuel/material irradiation examinations of LWRs, HTGR and fusion reactor as well as for RI productions under its transportation advantage that the JMTR and hot laboratory is connected by a canal. In August 2006, the JMTR operation was once stopped in order to have a check & review for the reoperation which was discussed by internal as well as external committees. As a result of the national discussion, the JMTR was determined, finally, to restart after necessary refurbishment works. The refurbishment was started from the beginning of JFY 2007, and replaced were motors of primary and secondary cooling pumps, nuclear instrumentation system, and so on. The refurbishment was finished in March 2011 as planned. Unfortunately, at the end of the JFY 2010 on March 11, the Great-Eastern-Japan-Earthquake occurred, and functional tests before the JMTR restart were delayed by the earthquake. Seismic influence evaluation for the JMTR because of the 3.11 earthquake was carried out with directions of the government. As a result, integrity of the JMTR reactor facilities has been evaluated and verified for re-operation. Seismic influence evaluation results were reported to the regulatory agency on Sep.7, 2012. Validation evaluation of the seismic influence evaluation results is still underway by the NRA. On the other hand, new regulatory requirements for research and test reactors will be established on Dec.18, 2013 by the NRA. JMTR will be re-started after the completion of validation evaluation of the seismic influence evaluation results and confirmation of suitability against the new regulatory requirements for research and test reactors by the NRA. The renewed JMTR will be operated for a period of about 20 years until around JFY 2030.
