Influence of tungsten microstructure and ion flux on deuterium plasma-induced surface modifications and deuterium retention

被引:37
|
作者
Buzi, L. [1 ,2 ,3 ,4 ]
De Temmerman, G. [2 ]
Unterberg, B. [1 ]
Reinhart, M. [1 ]
Dittmar, T. [1 ]
Matveev, D. [1 ]
Linsmeier, Ch. [1 ]
Breuer, U. [5 ]
Kreter, A. [1 ]
Van Oost, G. [3 ]
机构
[1] Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Partner Trilateral Euregio Cluster TEC, D-52425 Julich, Germany
[2] FOM, DIFFER Dutch Inst Fundamental Energy Res, Partner Trilateral Euregio Cluster, Amsterdam, Netherlands
[3] Univ Ghent, B-9000 Ghent, Belgium
[4] Univ Lorraine, Inst Jean Lamour, CNRS UMR 7198, F-54506 Vandoeuvre Les Nancy, France
[5] Res Ctr Julich GmbH, ZEA Analyt 3, Cent Inst Engn Elect & Analyt, D-52425 Julich, Germany
关键词
LOW-ENERGY; TEMPERATURE-DEPENDENCE; DEVICES;
D O I
10.1016/j.jnucmat.2014.12.006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The influence of surface temperature, particle flux density and material microstructure on the surface morphology and deuterium retention was studied by exposing tungsten targets (20 mu m and 40 mu m grain size) to deuterium plasma at the same particle fluence (10(26) m(-2)) and incident ion energy (40 eV) to two different ion fluxes (low flux: 10(22) m(-2) s(-1), high flux: 10(24) m(-2) s(-1)). The maximum of deuterium retention was observed at similar to 630 K for low flux density and at 870 K for high flux density, as indicated from the thermal desorption spectroscopy data (TDS). Scanning electron microscopy observations revealed the presence of blisters with a diameter of up to 1 mu m which were formed at high flux density and high temperature (1170 K) contrasting with previously reported surface modification results at such exposure conditions. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:320 / 324
页数:5
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