Faculty Profiles - OHNO, Noriyasu

MISC - OHNO, Noriyasu

Division display 1 - 20 of about 81 ／ All the affair displays >>

３．非接触プラズマと熱・粒子処理に関するダイバータ実験研究およびモデリングの現状と研究開発課題 Reviewed

大野哲靖

J. Plasma Fusion Res. Vol. 92 page： 877 - 881 2016

Nanostructure Formation on Refractory Metal Surfaces Irradiated by Helium Plasmas

Takamura Shuichi, Kajita Shin, Ohno Noriyasu

Butsuri Vol. 68 ( 9 ) page： 602 - 611 2013.9

Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：The Physical Society of Japan

Helium defects on plasma-facing refractory metals like tungsten have been studied in fusion sciences from the view point of the effects on metal surface properties, concentrating on the bubble formation. However, the surface morphology over the lower surface temperature range was found recently to be changed drastically, something like cotton down or arborescence, sometimes called as "fuzz". The formation process, although still open problem, would be discussed in terms of viscoelastic model with the effect of surface tension, taking account of its thermal properties and nano-bubbles inside the thin fibers. Some physical surface characteristics like electron emission, radiation emissivity and sputtering are quite influenced by its forest-like structure. Unipolar arcing has been newly studied by using such a surface structure which makes its initiation controllable. In the present report, other examples of nanostructure formation in a variety of particle incident conditions have been introduced as well as the possibility of its industrial applications to enhance interdisciplinary interests.

DOI： 10.11316/butsuri.68.9_602

CiNii Research

Merging Plasma Science into Combustion Science ― Plasma-Assisted Combustion ―

SASAKI Koichi, UESUGI Yoshihiko, OHNO Noriyasu, OSAKA Yugo

Journal of the Combustion Society of Japan Vol. 51 ( 158 ) page： 259 - 267 2009

Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：Combustion Society of Japan

<p>Recently, plasma-assisted combustion attracts much attention of many researchers as a new interdisciplinary field between combustion and plasma sciences. In this article, we describe a brief explanation of various plasmas, concepts of plasma-assisted combustion, and the research trend of plasma-assisted combustion. We also report examples of experimental investigation on plasma-assisted combustion, which have been carried out in authors' research groups.</p>

DOI： 10.20619/jcombsj.51.158_259

CiNii Research

核融合プラズマとプラズマプロセッシングの橋渡

大野哲靖, 高村秀一

プラズマ・核融合学会誌 Vol. Vol.84 page： 740 - 749 2008

JT-60U周辺プラズマ中の間欠的揺動と非拡散的プラズマ輸送

大野哲靖, 朝倉伸幸, 高村秀一

第22回プラズマ・核融合学会年会シンポジウムIII「核融合プラズマにおける周辺プラズマ揺動の物理と観測」 2004

Erratum:"Blob- and hole-like structures outstanding during the transition from attached to detached divertor states in GAMMA 10/PDX Physics of Plasmas" Reviewed

H.Tanaka, M.Sakamoto, N.Ezumi, K.Nojiri, A.Terakado, T.Mikami, Y.Kinoshita, K.Kobayashi, M.Yoshikawa, J.Kohagura, N.Ohno

Physics of Plasmas Vol. 28 ( 2 ) page： 29901 2021

プラズマ科学がもたらす新しい世界-核融合理工学技術のスピンオフー

柳長門、竹入康彦、大野哲靖、梶田信

電気評論 Vol. 104 ( 5 ) page： 67 - 71 2019.5

核融合分野における人材育成ー大学における核融合理工学教育ー

大野哲靖

電気評論 Vol. 104 ( 5 ) page： 72 - 76 2019.5

Effect of Damage Introduction and He Existence on D Retention in Tungsten by High Flux D Plasma Exposure

Yasuhisa Oya, Keisuke Azuma, Akihiro Togari, Moeko Nakata, Qilai Zhou, Mingzhong Zhao, Tatsuya Kuwabara, Noriyasu Ohno, Miyuki Yajima, Yuji Hatano, Takeshi Toyama

Lecture Notes in Networks and Systems Vol. 53 page： 89 - 96 2019.1

Language：Japanese

© 2019, Springer Nature Switzerland AG. Both of radiation-induced damages and helium (He) existence effects on deuterium (D) retention in tungsten (W) by D plasma exposure were evaluated using high flux divertor plasma exposure device, called Compact Divertor Plasma Simulator (CDPS). The results were compared with 3 keV D 2+ implanted W with low flux and fluence. The thermal desorption spectra were consisted of three desorption stages at 400, 600, 780 K. Comparing to the undamaged W, the D desorption stages were shifted towards higher temperature side and the values of D retention increased. It can be said that the formation of stable trapping sites by damage introduction enhances the D trapping in the damaged W. For He + irradiation, D desorption at lower temperature was enhanced, due to the formation of dense dislocation loops. In case of sequential Fe 2+ and He + implantation, D desorption at higher temperature was reduced, comparing to that for only Fe 2+ damaged W. These facts show that the accumulation of He near surface region reduces D diffusion toward bulk, leading to the reduction of D trapping by voids.

DOI： 10.1007/978-3-319-99834-3_12

Scopus

ヘリウムプラズマ照射を用いた酸化チタン薄膜光触媒のエチレン分解反応

富田雄大, 梶田信, 吉田朋子, 安永円理子, 大野哲靖, 田中宏彦

触媒討論会討論会A予稿集 Vol. 122nd page： 104 2018.9