Structure of materials deposited on the plasma facing surface in TRIAM-1M tokamak and the effect on hydrogen recycling

T. Hirai, T. Fujiwara, K. Tokunaga, N. Yoshida, A. Komori, O. Motojima, S. Itoh

研究成果: Contribution to journalArticle査読

15 被引用数 (Scopus)

抄録

Microstructure and chemical composition of depositions in TRIAM-1M under long pulse discharges have been examined. It is found that the deposition has a defective structure; the grain size is approximately 1 nm and the crystalline structure is not the normal body centered cubic (bcc) but is a face centered cubic (fee). By comparing with the vacuum-deposited molybdenum in various conditions, it is concluded that co-deposited oxygen plays an essential role for the defective structure. The vacuum-deposited molybdenum, which has the same structure as the depositions in TRIAM-1M, shows very large and strong hydrogen retention. Implanted deuteriums are desorbed as D2, DH, D2O and DHO. The present work indicates that re-deposition of sputtered atoms on plasma facing surfaces will be a serious problem even in a metallic tokamak. More attention should be paid to hydrogen retention in the deposited material.

本文言語英語
ページ(範囲)1177-1181
ページ数5
ジャーナルJournal of Nuclear Materials
283-287
PART II
DOI
出版ステータス出版済み - 2000

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学

フィンガープリント

「Structure of materials deposited on the plasma facing surface in TRIAM-1M tokamak and the effect on hydrogen recycling」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル