Effect of exposure temperature on deuterium retention and surface blistering of tungsten exposed to sequential nitrogen and deuterium plasma

被引:7
作者
Qin, Shaoyang [1 ,2 ]
Gao, Liang [3 ]
Cheng, Long [1 ,2 ]
Yuan, Yue [1 ,2 ]
Jacob, Wolfgang [3 ]
Lu, Guang-Hong [1 ,2 ]
Wang, Jinliang [1 ]
机构
[1] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
[2] Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 100191, Peoples R China
[3] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany
关键词
nitrogen; tungsten; deuterium retention; surface blistering; HYDROGEN RETENTION; POLYCRYSTALLINE TUNGSTEN; LOW-ENERGY; HIGH-FLUX; NITRIDE; DEPENDENCE; RELEASE; DENSITY;
D O I
10.1088/1741-4326/aad921
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Rolled tungsten (W) was sequentially exposed to nitrogen (N) and deuterium (D) plasma at different surface temperatures to investigate the influence of N pre-irradiation on D retention and surface blistering of W. Surface imaging revealed that significant amounts of blisters are formed after D exposure at 230 and 370 K. However, no blisters were found in the case of 520 K D exposure. In addition, N pre-irradiation increases the areal density of blisters, in particular that of small blisters. This effect becomes more significant for 500 K N exposure compared with 300 K N exposure. D depth profiles show that N pre-irradiation leads to an increase of the D concentration in the near surface. Thermal desorption spectra show that only one main desorption peak appears for the case of 230/520K, while two peaks are found for 370 K D exposure. Though N pre-irradiation does not change the deuterium desorption peak positions, it slightly changes the total D retention. These phenomena indicate a temperature dependence of the effect of N pre-irradiation on the D behavior in W.
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页数:9
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