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ウエダ ヨシオ
Ueda Yoshio
上田 良夫 所属 追手門学院大学 理工学部 電気電子工学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2011/08 |
| 形態種別 | 論文 |
| 査読 | 査読あり |
| 標題 | Microscopic damage of tungsten exposed to deuterium-helium mixture plasma in PISCES and its impacts on retention property |
| 執筆形態 | 共著・編著（代表編著を除く） |
| 掲載誌名 | JOURNAL OF NUCLEAR MATERIALS |
| 掲載区分 | 国外 |
| 出版社・発行元 | ELSEVIER SCIENCE BV |
| 巻・号・頁 | 415(1),pp.S657-S660 |
| 国際共著 | 国際共著 |
| 著者・共著者 | M. Miyamoto,D. Nishijima,M. J. Baldwin,R. P. Doerner,Y. Ueda,K. Yasunaga,N. Yoshida,K. Ono |
| 概要 | Microscopic damage and D retention in tungsten have been investigated for low-energy (similar to 60-120 eV), high flux (similar to 10(22) m(-2) s(-1)) high fluence (similar to 5 x 10(25) m(-2)) ion bombardment at moderate temperature (similar to 573-773 K) in mixed species D + He plasmas in the linear divertor plasma simulators PISCES-A and B. A significant reduction in D retention and the formation of nanometer-sized He bubbles occur in W due to seeding of He into the D plasma. The volume fraction of He bubbles, estimated with TEM observations and ellipsometric measurements, exceeds the percolation threshold. The desorption mechanism that injected D atoms diffuse back to the surface through the percolating bubbles is suggested. The seeding of Be into D + He mixture plasma eliminates this He effect on the reduction in D retention. (C) 2011 Elsevier B.V. All rights reserved. |
| DOI | 10.1016/j.jnucmat.2011.01.008 |
| ISSN | 0022-3115 |