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Journal Articles

Dynamics of deuterium implanted in boron coating film for wall conditioning

Nakahata, Toshihiko*; Yoshikawa, Akira*; Oyaizu, Makoto*; Oya, Yasuhisa*; Ishimoto, Yuki*; Kizu, Kaname; Yagyu, Junichi; Ashikawa, Naoko*; Nishimura, Kiyohiko*; Miya, Naoyuki; et al.

Journal of Nuclear Materials, 367-370(2), p.1170 - 1174, 2007/08

 Times Cited Count:3 Percentile:26.62(Materials Science, Multidisciplinary)

Retention and desorption behavior of deuterium implanted into pure boron films has been studied by means of the secondary ion mass spectroscopy. It was found that the factor dominating deuterium desorption was the sample temperature. At stage 1, below 573 K, the desorption of deuterium from B-D-B bond dominated and diffusion was the rate-determining process in this stage. Above 573 K, deuterium was mainly desorbed from B-D bonds, and recombination was the rate-determining process in this stage. The effective molecular recombination rate constant of deuterium trapped as B-D bond was determined by an isothermal annealing experiment.

Journal Articles

Comparison of boronized wall in LHD and JT-60U

Ashikawa, Naoko*; Kizu, Kaname; Yagyu, Junichi; Nakahata, Toshihiko*; Nobuta, Yuji; Nishimura, Kiyohiko*; Yoshikawa, Akira*; Ishimoto, Yuki*; Oya, Yasuhisa*; Okuno, Kenji*; et al.

Journal of Nuclear Materials, 363-365, p.1352 - 1357, 2007/06

 Times Cited Count:10 Percentile:56.9(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

The Effect of argon and helium glow discharge cleaning on boronized surface in LHD

Kizu, Kaname; Yagyu, Junichi; Ishimoto, Yuki*; Nakano, Tomohide; Tsuzuki, Kazuhiro*; Miya, Naoyuki; Ashikawa, Naoko*; Nishimura, Kiyohiko*; Sagara, Akio*

Annual Report of National Institute for Fusion Science; April 2005 - March 2006, P. 65, 2006/11

no abstracts in English

Journal Articles

Comparison of confinement degradation in high density and particle transport between tokamak and helical

Takenaga, Hidenobu; Oyama, Naoyuki; Fujita, Takaaki; Yamada, Hiroshi*; Nishimura, Kiyohiko*; Tanaka, Kenji*; Sakamoto, Ryuichi*

Annual Report of National Institute for Fusion Science; April 2003 - March 2004, P. 12, 2003/10

no abstracts in English

Journal Articles

Joint test of a digital integrator for long pulse experiments in LHD

Kawamata, Yoichi; Yonekawa, Izuru; Kurihara, Kenichi; Sakakibara, Satoru*; Nishimura, Kiyohiko*

Annual Report of National Institute for Fusion Science; April 2002 - March 2003, 59 Pages, 2003/00

no abstracts in English

Oral presentation

Boron distribution in vacuum vessel of JT-60U and LHD

Yagyu, Junichi; Kizu, Kaname; Ashikawa, Naoko*; Ishimoto, Yuki; Nishimura, Kiyohiko*; Miya, Naoyuki; Sagara, Akio*

no journal, , 

no abstracts in English

Oral presentation

Elucidation of detrapping behavior of trapped deuterium in boron film deposited in JT-60U

Nakahata, Toshihiko*; Yoshikawa, Akira*; Oyaizu, Makoto*; Oya, Yasuhisa*; Kizu, Kaname; Ishimoto, Yuki*; Yagyu, Junichi; Ashikawa, Naoko*; Nishimura, Kiyohiko*; Miya, Naoyuki; et al.

no journal, , 

no abstracts in English

Oral presentation

Influence of the LHD glow discharge cleaning that born thin film

Yagyu, Junichi; Kizu, Kaname; Ishimoto, Yuki*; Ashikawa, Naoko*; Nishimura, Kiyohiko*; Yoshikawa, Akira*; Miya, Naoyuki; Okuno, Kenji*; Sagara, Akio*; Oya, Kiyohisa*

no journal, , 

no abstracts in English

Oral presentation

Comparison of boronized wall between LHD and JT-60U for optimization of boronization procedure

Ashikawa, Naoko*; Nishimura, Kiyohiko*; Masuzaki, Takashi*; Sagara, Akio*; Oyabu, Nobuyoshi*; Kizu, Kaname; Yagyu, Junichi; Nobuta, Yuji; Ishimoto, Yuki*; Miya, Naoyuki; et al.

no journal, , 

no abstracts in English

Oral presentation

Kinetics study of deuterium desorption process in high purity boron film

Nakahata, Toshihiko*; Oya, Yasuhisa*; Yoshikawa, Akira*; Suda, Taichi*; Oyaizu, Makoto*; Ashikawa, Naoko*; Nishimura, Kiyohiko*; Yagyu, Junichi; Kizu, Kaname; Nobuta, Yuji; et al.

no journal, , 

no abstracts in English

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