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王维,张学希,叶小球,陈长安,王鹏,周燕燕,高涛.钨中氘热脱附特性的定量研究[J].稀有金属材料与工程(英文),2018,47(12):3735~3740.[wangwei,zhangxuexi,yexiaoqiu,chenchangan,wangpeng,zhouyanyan and gaotao.Quantitative study on thermal desorption of deuterium in tungsten[J].Rare Metal Materials and Engineering,2018,47(12):3735~3740.]
Quantitative study on thermal desorption of deuterium in tungsten
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Received:April 18, 2017  Revised:June 08, 2017
Key words: Tungsten  Deuterium  Thermal desorption  Thermal desorption energy  Radiation defects  Vacancies
Foundation item:国家磁约束聚变计划专项(2015GB109002),国家自然科学基金青年基金(21401173),中国工程物理研究院科学技术发展基金(2014B0301048)资助
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wangwei,zhangxuexi,yexiaoqiu,chenchangan,wangpeng,zhouyanyan and gaotao  
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      Tungsten (W) is one of the primary plasma-facing materials candidate for fusion reactor in the future. It is very significant to carry out a quantitative study on the movement and retention behavior of hydrogen isotopes in W, since it can be used to evaluate the service performance of tungsten and the material balance of fusion reactor fuel. In this work, polycrystalline W was irradiated with 100 eV D+ ions to the fluence of 3.8 × 1024 D/m2. And the subsequent thermal desorption characteristics of polycrystalline W at different heating rates were investigated by thermal desorption spectroscopy. The tota amount of deuterium desorption is about 1022 D2/m2 orders of magnitude. In particular, the thermal desorption peaks can shift to higher temperature side as the increase of heating rate. The thermal desorption behavior of deuterium in polycrystalline W is in accord with the first order reaction. The vacancies formation is the main trapping state of deuterium, and the thermal desorption energy of D atom is 1.04 eV.