Irradiation test of Mo- and W-mirrors for ITER by low energy deuterium ions
Irradiation test of Mo- and W-mirrors for ITER by low energy deuterium ions
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DOI：
10.1016/j.jnucmat.2004.04.248
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发表时间：
2004-08
影响因子：
3.1
通讯作者：
T. Sugie;S. Kasai;M. Taniguchi;M. Nagatsu;T. Nishitani
中科院分区：
文献类型：
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作者：
T. Sugie;S. Kasai;M. Taniguchi;M. Nagatsu;T. Nishitani
钼和钨等金属材料将用于ITER中面向等离子体的反射镜。用高通量（5.2-6.0× 1019 m-2s-1）、低能（67-80 eV）氘离子辐照不同方法制造的钼和钨反射镜试件。通过烧结和电子束熔化表面的薄层制造的钼反射镜在照射前比没有表面熔化的反射镜具有更高的反射率，但是前一反射镜的反射率随着注量迅速下降。这种快速下降是由镜面上产生的水泡引起的。在1.2-1.3× 1025 m −2的注量下，通过烧结而没有表面熔化的钼和钨反射镜的250 nm-20 μm波长反射率的下降小于10%。
Metallic materials such as molybdenum and tungsten will be used for plasma facing mirrors in ITER. Test pieces of molybdenum and tungsten mirrors manufactured by different methods were irradiated by high flux (5.2–6.0×1019m−2s−1), low energy (67–80 eV) deuterium ions. The molybdenum mirror manufactured by sintering and electron beam melting of a thin layer of the surface had a higher reflectivity before irradiation than the mirror made without surface melting, but the reflectivity of the former mirror decreased rapidly with fluence. This rapid decrease was caused by blisters generated on the mirror surfaces. The decrease of the 250 nm–20 μm wavelength reflectivity of the molybdenum and the tungsten mirrors made by sintering without surface melting was less than 10% at fluence of 1.2–1.3×1025m−2.