JOPSS - Search Results

Journal Articles

Development of standard substance for hydrogen analysis in materials

Ogawa, Hiroaki; Ishikawa, Norito

2023-Nendo Daigaku Kenkyu Josei Gijutsu Kenkyu Hokokusho, p.123 - 134, 2024/03

Evaluation of corrosion and hydrogen embrittlement is important in the quality control of stainless steel and the development of next steel materials assuming a high-pressure hydrogen environment. Typically, a secondary ion mass spectrometer (SIMS) is used to analyze hydrogen in steel materials. The hydrogen concentration of conventional standard substance for hydrogen analysis is as small as 1wt-ppm, which has been a problem in hydrogen analysis. We use a hydrogen-implant method to create a locally higher hydrogen concentration than that of the conventional. Hydrogen concentration analysis has been evaluated using the nuclear reaction analysis (NRA) method at a tandem accelerator. We have succeeded in creating a sample with a higher hydrogen concentration of about 1,900 wt-ppm than that of the conventional in locally.

Journal Articles

Deuterium depth profiling in JT-60U W-shaped divertor tiles by nuclear reaction analysis

Hayashi, Takao; Ochiai, Kentaro; Masaki, Kei; Goto, Yoshitaka*; Kutsukake, Chuzo; Arai, Takashi; Nishitani, Takeo; Miya, Naoyuki

Journal of Nuclear Materials, 349(1-2), p.6 - 16, 2006/02

https://doi.org/10.1016/j.jnucmat.2005.06.019

Times Cited Count：10 Percentile：56.44(Materials Science, Multidisciplinary)

Deuterium concentrations and depth profiles in plasma-facing graphite tiles used in the divertor of JT-60U were investigated by NRA. The highest deuterium concentration of D/ $^{12}$ C of 0.053 was found in the outer dome wing tile, where the deuterium accumulated probably through the deuterium-carbon co-deposition. In the outer and inner divertor target tiles, the D/ $^{12}$ C data were lower than 0.006. Additionally, the maximum (H+D)/ $^{12}$ C in the dome top tile was estimated to be 0.023 from the results of NRA and SIMS. OFMC simulation showed energetic deuterons caused by NBI were implanted into the dome region with high heat flux. Furthermore, the surface temperature and conditions such as deposition and erosion significantly influenced the accumulation process of deuterium. The deuterium depth profile, SEM observation and OFMC simulation indicated the deuterium was considered to accumulate through three processes: the deuterium-carbon co-deposition, the implantation of energetic deuterons and the deuterium diffusion into the bulk.

Journal Articles

Measurement of deuterium and tritium retentions on the surface of JT-60 divertor tiles by means of nuclear reaction analysis

Ochiai, Kentaro; Hayashi, Takao; Kutsukake, Chuzo; Goto, Yoshitaka*; Masaki, Kei; Arai, Takashi; Miya, Naoyuki; Nishitani, Takeo

Journal of Nuclear Materials, 329-333(Part1), p.836 - 839, 2004/08

https://doi.org/10.1016/j.jnucmat.2004.04.292

Times Cited Count：4 Percentile：28.95(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Sorption mechanism of europium by apatite using Rutherford backscattering spectroscopy and resonant nuclear reaction analysis

Onuki, Toshihiko; Kozai, Naofumi; Isobe, Hiroshi; Murakami, Takashi*; Yamamoto, Shunya; Aoki, Yasushi; Naramoto, Hiroshi

Journal of Nuclear Science and Technology, 34(1), p.58 - 62, 1997/01

https://doi.org/10.3327/jnst.34.58

Times Cited Count：18 Percentile：78.80(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Analysis of hydrogen in Nb thin films and Nb/Cu multilayers, using ion beam

Yamamoto, Shunya; Naramoto, Hiroshi; Aoki, Yasushi

Journal of Alloys and Compounds, 253-254, p.66 - 69, 1997/00

https://doi.org/10.1016/S0925-8388(96)03057-5

Times Cited Count：5 Percentile：44.12(Chemistry, Physical)

no abstracts in English

Journal Articles

Analysis of hydrogen in Nb/Cu multilayers using ion beams

Yamamoto, Shunya; Goppelt-Langer, P.*; Naramoto, Hiroshi; Aoki, Yasushi; Takeshita, Hidefumi

Journal of Alloys and Compounds, 231, p.310 - 314, 1995/00

https://doi.org/10.1016/0925-8388(95)01805-0

Times Cited Count：8 Percentile：54.83(Chemistry, Physical)

no abstracts in English

Journal Articles

Initial boronization of JT-60U tokamak using decaborane

Saido, Masahiro; Ogiwara, Norio; Shimada, Michiya; Arai, Takashi; Hiratsuka, Hajime; ; Shimizu, Masatsugu; Ninomiya, Hiromasa; Nakamura, Hiroo; ; et al.

Japanese Journal of Applied Physics, 32(7), p.3276 - 3281, 1993/07

https://doi.org/10.1143/JJAP.32.3276

Times Cited Count：58 Percentile：91.05(Physics, Applied)

no abstracts in English

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