Surface morphology and helium retention on tungsten exposed to low energy and high flux helium plasma
Surface morphology and helium retention on tungsten exposed to low energy and high flux helium plasma
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DOI：
10.1016/s0022-3115(02)01362-4
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发表时间：
2003-03
影响因子：
3.1
通讯作者：
K. Tokunaga;R. Doerner;R. Seraydarian;N. Noda;Y. Kubota;N. Yoshida;T. Sogabe;T. Kato;B. Schedler
中科院分区：
文献类型：
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作者：
K. Tokunaga;R. Doerner;R. Seraydarian;N. Noda;Y. Kubota;N. Yoshida;T. Sogabe;T. Kato;B. Schedler
研究了粉末冶金钨和等离子喷涂钨涂层CFC在低能（100 eV）高通量（3.83× 10 ~（21）~ 1.20× 10 ~（22）m-2s-1）氦等离子体辐照下的表面改性和氦滞留。注量约为1026 He m−2。结果表明，氦辐照使薄膜表面形貌发生了细微的变化。粉末冶金钨和等离子喷涂钨的表面改性差别不大。在表面形貌不变的情况下，出现了两个氦脱附峰。在相同的曝光条件下，用TDS加热到1273 K，从钨中解吸氦的量大于解吸氘的量。在发生微细表面形态变化的情况下，新出现高温脱附峰。在与通过氘暴露形成气泡相同的暴露条件下，在暴露于氦的表面上不形成诸如气泡的表面改性。
Surface modification and helium retention on powder metallurgy tungsten and plasma sprayed tungsten coated CFC exposed by low energy (100 eV) high flux (3.83×1021–1.20×1022m−2s−1) helium plasma have been investigated. Fluence is about 1026He m−2. It is found that fine surface morphology change occurs by the helium exposure. There is little difference of the surface modification between the powder metallurgy tungsten and the plasma sprayed tungsten. In the case that the surface morphology do not changed, two helium desorption peak appeared. The amount of desorption of helium is larger than that of deuterium from tungsten under the same exposure condition by heating up to 1273 K by TDS. In the case that fine surface morphology change occurs, desorption peak at high temperature newly appears. Surface modification such as blister is not formed on the surface exposed to helium under the same exposure condition which the blister is formed by deuterium exposure.