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arXiv · 1909.06820

Comparison of deuterium retention in tungsten exposed to deuterium plasma and gas

Xiaoqiu Ye·Wei Wang·Yifang Wang·Xiaohong Chen·Jiliang Wu·Yao Xiao·Xuefeng Wang·Jun Yan·Wenzhen Yu·Changan Chen
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Abstract

Deuterium(D) retention behavior in tungsten(W) exposed to deuterium plasma and gas was studied by means of thermal desorption spectroscopy (TDS): deuterium plasma exposure in which W was exposed to D plamsa with 35 eV/D at 393 K to the fluence of 3.8E24 D/m2; D2 gas charging in which W was exposed to D2 gas of 500 kPa at 773 K for 4 hours. TDS shows that the total D retention in plasma exposure W is 1.00E22 D/m2, one order of magnitude higher than that of gas charging W; however, the D2 desorption peak of gas charging W is 952 K, much higher than 691 K of plasma exposure W. The detrapping energies of deuterium were determined experimentally from the measured peak temperatures at different heating rates and were found to be 2.17 eV for gas charging W and 1.04 eV for plasma exposure W, respectively.

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Xiaoqiu Ye, Wei Wang, Yifang Wang, Xiaohong Chen, Jiliang Wu, Yao Xiao, Xuefeng Wang, Jun Yan, Wenzhen Yu, Changan Chen. 2019-09-15. Comparison of deuterium retention in tungsten exposed to deuterium plasma and gas. https://arxiv.org/abs/1909.06820

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