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Effect of D on the evolution of radiation damage in W during high temperature annealing
Nuclear Fusion ( IF 3.5 ) Pub Date : 2020-09-21 , DOI: 10.1088/1741-4326/abaff6
M. Pečovnik 1 , S. Markelj 1 , M. Kelemen 1 , T. Schwarz-Selinger 2
Affiliation  

The effect of deuterium (D) on the annealing of radiation damage was studied. Tungsten (W) samples were sequentially irradiated with 20 MeV W ions at room temperature and loaded with a low-temperature D plasma at 370 K to decorate the created defects. After this, half of each sample was W irradiated at room temperature again to create additional radiation damage. To study the evolution of the created defects with D being present, samples were annealed by heating them to a desired temperature and held for 2 h. The surviving displacement damage was decorated by re-exposing the samples to the same D plasma as before. At various steps of the experiment the D depth profiles were measured using nuclear reaction analysis and after the last re-exposure a thermal desorption spectroscopy analysis was done to determine the D desorption spectra. D release is dominated by two desorption peaks centred at 520 K and 780 K for a 3 K min −1 temperature ramp. For temperature holds...

中文翻译:

D对高温退火过程中W辐射损伤演化的影响

研究了氘对辐射损伤退火的影响。在室温下依次用20 MeV W离子辐照钨(W)样品,并在370 K的低温D等离子体中加载钨,以装饰所产生的缺陷。此后,将每个样品的一半再次在室温下辐照以产生额外的辐射损伤。为了研究存在D时产生的缺陷的演变,将样品加热到所需温度进行退火,并保持2 h。通过将样品重新暴露于与之前相同的D等离子体中,对残存的位移损伤进行装饰。在实验的各个步骤中,使用核反应分析测量D深度剖面,并在最后一次暴露后进行热脱附光谱分析以确定D脱附光谱。在3 K min -1的温度梯度下,D释放主要由两个以520 K和780 K为中心的解吸峰。对于温度保持...
更新日期:2020-09-22
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