Investigation of mechanisms of hydrogen retention in tungsten coating layers simultaneously irradiated by hydrogen and carbon ions

氢离子和碳离子同时辐照钨涂层中氢保留机制的研究

• 批准号: 24760710
• 负责人: FUKUMOTO Masakatsu
• 金额: $ 2.83万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24760710/
• 关键词: プラズマ・核融合; 被覆タングステン; トリチウムリテンション; 炭素; プラズマ壁相互作用; 水素蓄積; 材料混合

Mechanisms of hydrogen retention in tungsten coating layers have been investigated with a mixed deuterium and carbon ion beam irradiation including a carbon ion fraction of up to 3.2%. For the irradiation temperature of 500 K, injected deuterium atoms are retained at intrinsic defects and carbon atoms accumulated in the tungsten coating layer. For the irradiation temperature of 700 K, injected deuterium atoms are retained at carbon atoms accumulated in the tungsten coating layer, and the deuterium atoms are chemically bonded with the carbon atoms, forming C-D bonds. Most of the accumulated deuterium atoms desorb in the form of hydrocarbon molecules by heating of the tungsten coating layer. This leads to removal of the accumulated carbon atoms from the tungsten coating layer in addition to the retained deuterium atoms.

用含高达3.2%的碳离子的混合氚和碳离子束辐照，研究了钨涂层中的滞氢机理。当辐照温度为500K时，注入的氢原子保留在本征缺陷处，碳原子聚集在钨涂层中。当辐照温度为700K时，注入的氢原子保留在钨涂层中积累的碳原子上，与碳原子发生化学键作用，形成C-D键。通过加热钨涂层，大部分积累的氚原子以碳氢分子的形式解吸。这导致了从钨涂层中除去累积的碳原子，以及保留的氘原子。

项目成果

Deuterium retention in tungsten coating layers irradiated by mixed deuterium and carbon ion beam

混合氘和碳离子束辐照钨涂层中的氘保留

• 发表时间: 2014
• 作者: M. Fukumoto;T. Nakano;Y. Ueda; H. Kubo;K. Itami
• 通讯作者: K. Itami