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Journal Articles

Neutron reflectometry analysis of condensed water layer formation at a solid interface of epoxy resins under high humidity

Liu, Y.*; Miyata, Noboru*; Miyazaki, Tsukasa*; Shundo, Atsuomi*; Kawaguchi, Daisuke*; Tanaka, Keiji*; Aoki, Hiroyuki

Langmuir, 39(29), p.10154 - 10162, 2023/06

 Times Cited Count:0 Percentile:56.68(Chemistry, Multidisciplinary)

Journal Articles

Kinetics of the interfacial curing reaction for an epoxy-amine mixture

Yamaguchi, Ko*; Kawaguchi, Daisuke*; Miyata, Noboru*; Miyazaki, Tsukasa*; Aoki, Hiroyuki; Yamamoto, Satoru*; Tanaka, Keiji*

Physical Chemistry Chemical Physics, 24(36), p.21578 - 21582, 2022/09

Journal Articles

Detailed structural study on the poly(vinyl alcohol) adsorption layers on a Si substrate with solvent vapor-induced swelling

Miyazaki, Tsukasa*; Miyata, Noboru*; Yoshida, Tessei*; Arima, Hiroshi*; Tsumura, Yoshihiro*; Torikai, Naoya*; Aoki, Hiroyuki; Yamamoto, Katsuhiro*; Kanaya, Toshiji*; Kawaguchi, Daisuke*; et al.

Langmuir, 36(13), p.3415 - 3424, 2020/04

 Times Cited Count:12 Percentile:59.54(Chemistry, Multidisciplinary)

Journal Articles

Elucidation of a heterogeneous layered structure in the thickness direction of poly(vinyl alcohol) films with solvent vapor-induced swelling

Miyazaki, Tsukasa*; Miyata, Noboru*; Asada, Mitsunori*; Tsumura, Yoshihiro*; Torikai, Naoya*; Aoki, Hiroyuki; Yamamoto, Katsuhiro*; Kanaya, Toshiji*; Kawaguchi, Daisuke*; Tanaka, Keiji*

Langmuir, 35(34), p.11099 - 11107, 2019/08

 Times Cited Count:19 Percentile:68.25(Chemistry, Multidisciplinary)

Journal Articles

Titanium alloy as a potential low radioactivation vacuum material

Kamiya, Junichiro; Hikichi, Yusuke; Kinsho, Michikazu; Ogiwara, Norio; Fukuda, Mitsuhiro*; Hamatani, Noriaki*; Hatanaka, Kichiji*; Kamakura, Keita*; Takahisa, Keiji*

Journal of Vacuum Science and Technology A, 33(3), p.031605_1 - 031605_8, 2015/05

 Times Cited Count:5 Percentile:23.08(Materials Science, Coatings & Films)

For the vacuum systems of high-intensity beam accelerators, low radioactivation materials with good vacuum characteristics and high mechanical strength are required. The titanium alloy Ti-6Al-4V was investigated as a potential low activation vacuum material with high mechanical strength for the fabrication of vacuum components, particularly the flanges of beam pipes, in the J-PARC 3 GeV synchrotron. The dose rate of Ti-6Al-4V when irradiated by a 400 MeV proton was observed to decrease more rapidly than that of stainless steel. Furthermore, the generated radioactive isotopes were nuclides with relatively short half-lives. The outgassing rate of Ti-6Al-4V was the same as the typical value for stainless steel. Additionally, the hydrogen concentration in bulk Ti-6Al-4V was reduced to approximately 1 ppm by vacuum firing. These results indicate that Ti-6Al-4V is a good candidate for use as a low activation vacuum material with high mechanical strength.

Journal Articles

High-speed classification of coherent X-ray diffraction Patterns on the K computer for high-resolution single biomolecule imaging

Tokuhisa, Atsushi*; Arai, Junya*; Jochi, Yasumasa*; Ono, Yoshiyuki*; Kameyama, Toyohisa*; Yamamoto, Keiji*; Hatanaka, Masayuki*; Gerofi, B.*; Shimada, Akio*; Kurokawa, Motoyoshi*; et al.

Journal of Synchrotron Radiation, 20(6), p.899 - 904, 2013/11

 Times Cited Count:5 Percentile:29.32(Instruments & Instrumentation)

Journal Articles

Fractures distribution around underground gallery in sedimentary rock area

Nohara, Shintaro*; Nakata, Eiji*; Suenaga, Hiroshi*; Tanaka, Shiro*; Kubota, Kenji*; Oyama, Takahiro*; Kondo, Keiji

Nihon Oyo Chishitsu Gakkai Heisei-25-Nendo Kenkyu Happyokai Koen Rombunshu, p.129 - 130, 2013/10

no abstracts in English

Journal Articles

Titanium alloy as low activation vacuum material

Kamiya, Junichiro; Ogiwara, Norio; Kinsho, Michikazu; Kamakura, Keita*; Hamatani, Noriaki*; Hatanaka, Kichiji*; Fukuda, Mitsuhiro*; Takahisa, Keiji*

Journal of the Vacuum Society of Japan, 56(5), p.167 - 171, 2013/05

no abstracts in English

JAEA Reports

Horonobe Underground Research Laboratory Project; Investigation report for the 2011 fiscal year

Nakayama, Masashi; Amano, Kenji; Tokiwa, Tetsuya; Yamamoto, Yoichi; Oyama, Takuya; Amano, Yuki; Murakami, Hiroaki; Inagaki, Daisuke; Tsusaka, Kimikazu; Kondo, Keiji; et al.

JAEA-Review 2012-035, 63 Pages, 2012/09

JAEA-Review-2012-035.pdf:12.23MB

The Horonobe Underground Research Laboratory Project is planned to extend over a period 20 years. The investigations will be conducted in three phases, namely "Phase 1: Surface-based investigations", "Phase 2: Construction Phase" (investigations during construction of the underground facilities) and "Phase 3: Operation phase"(research in the underground facilities). This report summarizes the results of the investigations for the 2011 fiscal year (2011/2012). The investigations, which are composed of "Geoscientific research" and "R&D on geological disposal technology", were carried out according to "Horonobe Underground Research Laboratory Project Investigation Program for the 2011 Fiscal year". The results of these investigations, along with the results which were obtained in other departments of Japan Atomic Energy Agency (JAEA), are properly offered to the implementations and the safety regulations. For the sake of this, JAEA has proceeded with the project in collaboration with experts from domestic and overseas research organisations.

Journal Articles

Evaluation of the white neutron beam spectrum for single-event-effects testing at the RCNP cyclotron facility

Iwamoto, Yosuke; Fukuda, Mitsuhiro*; Sakamoto, Yukio; Tamii, Atsushi*; Hatanaka, Kichiji*; Takahisa, Keiji*; Nagayama, Keiichi*; Asai, Hiroaki*; Sugimoto, Kenji*; Nashiyama, Isamu*

Nuclear Technology, 173(2), p.210 - 217, 2011/02

 Times Cited Count:29 Percentile:89.79(Nuclear Science & Technology)

The 30 $$^{circ}$$ white neutron beam at RCNP facility has been characterized as a prove suitable for testing of single event effects (SEEs) in semiconductors in the neutron energy range from 1 to 300 MeV using the 392-MeV proton incident reaction on a 6.5-cm-thick tungsten target. The neutron spectrum in measurements were demonstrated to provide a neutron spectrum similar to the terrestrial one at sea level, but with an enhancement in the intensity of a factor of 1.5$$times$$10$$^{8}$$. The average neutron intensity and spectrum from 10 to 300 MeV at RCNP were almost same as those at WNR. The calculated RCNP neutron flux using PHITS generally agreed with the measured RCNP data within a factor of two. As the neutron density per pulse for RCNP is 500 times lower than that for WNR, the pileup probability of single-event transient currents and false multiple-bit upsets is reduced. Such conditions at RCNP are suitable for accelerated SEE testing to get meaningful results in realistic time frame.

Journal Articles

Introduction to plasma fusion energy

Takamura, Shuichi*; Kado, Shinichiro*; Fujii, Takashi*; Fujiyama, Hiroshi*; Takabe, Hideaki*; Adachi, Kazuo*; Morimiya, Osamu*; Fujimori, Naoji*; Watanabe, Takayuki*; Hayashi, Yasuaki*; et al.

Kara Zukai, Purazuma Enerugi No Subete, P. 164, 2007/03

no abstracts in English

Journal Articles

Spatial coherence measurement of the 13.9nm Ni-like Ag soft X-ray laser pumped by a 1.5ps, 20J laser

Tang, H.; Daido, Hiroyuki; Kishimoto, Maki; Sukegawa, Kota*; Tai, R.; Mesesson, S.*; Tanaka, Momoko; Lu, P.; Kawachi, Tetsuya; Nagashima, Keisuke; et al.

Japanese Journal of Applied Physics, 42(2A), p.443 - 448, 2003/02

 Times Cited Count:14 Percentile:50.41(Physics, Applied)

no abstracts in English

Journal Articles

Dipole excitation of $$alpha$$ clusters in $$^{6}$$Li and $$^{7}$$Li

Nakayama, Shintaro*; Yamagata, Tamio*; Akimune, Hidetoshi*; Daito, Izuru*; Fujimura, Hisako*; Fujita, Yoshitaka*; Fujiwara, Mamoru; Fushimi, Kenichi*; Greenfield, M. B.*; Kori, Hideki*; et al.

Physical Review Letters, 87(12), p.122502_1 - 122502_4, 2001/09

 Times Cited Count:20 Percentile:69.97(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Soft dipole resonance in the neutron-skin nucleus $$^{6}$$He

Nakayama, Shintaro*; Yamagata, Tamio*; Akimune, Hidetoshi*; Daito, Izuru*; Fujimura, Hisako*; Fujita, Yoshitaka*; Fujiwara, Mamoru; Fushimi, Kenichi*; Inomata, Toru*; Kori, Hideki*; et al.

Physical Review Letters, 85(2), p.262 - 265, 2000/07

 Times Cited Count:73 Percentile:88.99(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Tokamak reactor operation scenario based on plasma heating and current drive by negative ion based neutral beam injector

Yamamoto, Shin; *; Nishio, Satoshi; Sugihara, Masayoshi; *; *; *; Fujisawa, Noboru; Tone, Tatsuzo; Ohara, Yoshihiro; et al.

Plasma Physics and Controlled Nuclear Fusion Research, Vol. 3, 1 Pages, 1987/00

no abstracts in English

Oral presentation

Selection of metal element transport-deficient mutants using ion beams

Tsukamoto, Takashi*; Nakanishi, Keiji*; Nishizawa, Naoko*; Mori, Satoshi*; Hase, Yoshihiro; Tanaka, Atsushi

no journal, , 

no abstracts in English

Oral presentation

Development of the white neutron irradiation field in RCNP, Osaka University

Iwamoto, Yosuke; Sakamoto, Yukio; Fukuda, Mitsuhiro*; Tamii, Atsushi*; Takahisa, Keiji*; Hatanaka, Kichiji*; Asai, Hiroaki*; Sugimoto, Kenji*; Nashiyama, Isamu*

no journal, , 

Recently, the soft error which is induced by high energy white neutron incidence from the space have been evaluated at WNR of Los Alamos National Laboratory. In Japan, white neutron irradiation field has not been developed, therefore, it is necessary to establish Japanese neutron field for the development of Japanese own airplane and space craft. In this work, neutron energy spectra at 30 degrees for the 392MeV proton incidence were measured at RCNP, Osaka University by using Time-Of-Flight techniques, and comparison between obtained data and the data of WNR was done. As a result, the white neutron field of RCNP is suitable for irradiation field of semi-conductor because the shape of neutron energy spectra is same with WNR data and calculated result of PHITS.

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