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Effect of heavy ion pre-irradiation on blistering and deuterium retention in tungsten exposed to high-fluence deuterium plasma
Wang, SW; Zhu, XL; Cheng, L; Guo, WG; Liu, M; Xu, C; Yuan, Y; Fu, EG; Cao, XZ; Lu, GH; Cao XZ(曹兴忠)
2018
Source PublicationJOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
EISSN1873-4820
Volume508Pages:395-402
SubtypeArticle
AbstractSurface blistering and deuterium (D) retention of heavy ion pre-irradiated (1 dpa) tungsten (W) exposed to low-energy (40 eV) and high-flux (1-2 x 10(22) D/m(2)s) D plasma has been investigated with low fluence of 0.1 x 10(27) D/m(2) and a high fluence of 2.2 x 10(27) D/m(2). Surface morphology observations show that a large number of blisters are formed on the undamaged W after low-fluence exposure while the area density of the blister will have significantly increased and blister bursting will be triggered in the case of high-fluence exposure. In contrast, the heavy ion pre-irradiation noticeably reduces the area density of blisters for both low-and high-fluence exposures. The thermal desorption spectroscopy (TDS) shows that the total D retention in the pre-damaged W is greater than that of the undamaged sample, and this trend is more significant with increasing fluence/duration of D plasma exposure. The results of positron annihilation Doppler broadening spectrometry (PA-DBS) and TDS indicate that a large number of vacancy-type defects, especially those with a higher trapping energy of D, are induced by the heavy ion pre-irradiation. The increasing defects/D-trap sites may result in two outcomes, the D concentration will disperse at each blister nucleation site and D inward diffusion is enhanced and, therefore, lead to the mitigation of D-induced blistering and increase the D retention. In addition, combined with the enhanced D inward diffusion caused by increasing exposure duration, the D retention is therefore much higher in the pre-damaged W in the case of high-fluence exposure. (C) 2018 Elsevier B.V. All rights reserved.
DOI10.1016/j.jnucmat.2018.05.082
WOS KeywordHIGH-FLUX ; LOW-ENERGY ; POSITRON-ANNIHILATION ; DAMAGED TUNGSTEN
Indexed BySCI ; EI
Language英语
WOS Research AreaMaterials Science ; Nuclear Science & Technology
WOS SubjectMaterials Science, Multidisciplinary ; Nuclear Science & Technology
WOS IDWOS:000439134500044
EI Accession Number20182305284833
ADS Bibcode2018JNuM..508..395W
Citation statistics
Cited Times:15 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286134
Collection加速器中心
多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Wang, SW,Zhu, XL,Cheng, L,et al. Effect of heavy ion pre-irradiation on blistering and deuterium retention in tungsten exposed to high-fluence deuterium plasma[J]. JOURNAL OF NUCLEAR MATERIALS,2018,508:395-402.
APA Wang, SW.,Zhu, XL.,Cheng, L.,Guo, WG.,Liu, M.,...&曹兴忠.(2018).Effect of heavy ion pre-irradiation on blistering and deuterium retention in tungsten exposed to high-fluence deuterium plasma.JOURNAL OF NUCLEAR MATERIALS,508,395-402.
MLA Wang, SW,et al."Effect of heavy ion pre-irradiation on blistering and deuterium retention in tungsten exposed to high-fluence deuterium plasma".JOURNAL OF NUCLEAR MATERIALS 508(2018):395-402.
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