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Comparison of deuterium retention in tungsten exposed to deuterium plasma and gas
Nuclear Materials and Energy ( IF 2.3 ) Pub Date : 2020-07-15 , DOI: 10.1016/j.nme.2020.100775
Xiaoqiu Ye , Wei Wang , Qifa Pan , Chunli Jiang , Yifang Wang , Xiaohong Chen , Jiliang Wu , Changan Chen

Deuterium (D) retention behavior in tungsten (W) exposed to D plasma and D2 gas was studied by means of thermal desorption spectroscopy (TDS): D plasma exposure in which W was exposed to D plasma with 35 eV/D+ at 393 K for 0.5 h to the fluence of 3.8 × 1024 D/m2; D2 gas charging in which W was exposed to D2 gas of 500 kPa at 773 K for 4 h. TDS shows that the total D retention in plasma exposure W is ~1022 D/m2, two orders 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 at the heating rate of 20 K/min. 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 the gas charging W and 1.04 eV for the plasma exposure W, respectively.



中文翻译:

暴露于等离子体和气体中的钨中氘的保留比较

通过热解吸光谱法(TDS)研究了暴露在D等离子体和D 2气体中的钨(W)中的氘(D)保留行为:D等离子体暴露,其中W在393以35 eV / D +暴露于D等离子体钾0.5 h至3.8×10 24  D / m 2的通量; D 2气体装料,其中W在773 K下暴露于500 kPa的D 2气体中4 h。TDS显示,等离子体暴露W中的总D保留量约为10 22  D / m 2,比充气W的D保留量高两个数量级。但是,D 2气体充入量W的解吸峰为952 K,远高于20 K / min加热速率下的等离子体暴露W的691K。根据不同加热速率下测得的峰值温度,通过实验确定了氘的俘获能,发现气体充注W的氘的俘获能分别为2.17 eV和等离子体暴露W的氘的俘获能分别为1.04 eV。

更新日期:2020-07-15
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