Chemical erosion of atomically dispersed doped hydrocarbon layers by deuterium

被引：15

作者：

Balden, M ^{[1
]}

Roth, J ^{[1
]}

Pardo, ED ^{[1
]}

Wiltner, A ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany

来源：

JOURNAL OF NUCLEAR MATERIALS | 2003年 / 313卷

关键词：

chemical erosion; carbon; plasma-wall interaction; hydrogen; doping;

D O I：

10.1016/S0022-3115(02)01342-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The chemical erosion of atomically dispersed Ti-doped (similar to10 at.%) amorphous hydrocarbon layers (a-C:H:Ti) was investigated in the temperature range of 300-800 K for 30 eV deuterium impact. Compared to pyrolytic graphite, the methane production yield is strongly reduced at elevated temperatures. This reduction starts from temperatures just above room temperature and is even larger than for B-doped graphite. The reduction of the activation energy for hydrogen release may be the dominant interpretation for the decreased hydrocarbon formation. The ratio of emitted CD3 to CD4 increases with temperature for pyrolytic graphite and even stronger for the doped layers. The fluence dependence of the chemical erosion yield was determined, which is explained by enrichment of the dopant due to the preferential erosion of C. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：348 / 353

页数：6

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