Investigation on modification of plasma facing surface under long duration discharges by means of a collector probe in TRIAM-1M

被引：13

作者：

Hirai, T ^{[1
]}

Tokunaga, K ^{[1
]}

Fujiwara, T ^{[1
]}

Yoshida, N ^{[1
]}

Itoh, S ^{[1
]}

机构：

[1] Kyushu Univ, Appl Mech Res Inst, Interdisciplinary Grad Sch Engn Sci, Fukuoka 8168580, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 1998年 / 258卷

关键词：

D O I：

10.1016/S0022-3115(98)00278-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Metallic specimens mounted on a collector probe head were inserted in the scrape-off layer and exposed to long pulse tokamak plasma in TRIAM-1M. Strong radiation damage (formation of interstitial loops)was caused by high energy (>2 keV) charge-exchange hydrogen neutrals. The surfaces of the probe specimens were covered by new material made of co-deposited in-vessel elements such as Fe, Cr, Mo, O and C. The deposited layer was often exfoliated by blistering. These results indicate that energetic hydrogen neutrals and the co-deposition of impurities considerably change the surface properties of plasma facing components and even Introduce new impurity sources. (C) 1998 Elsevier Science: B.V. All rights reserved.

引用

页码：1060 / 1065

页数：6

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