类金刚石膜用作负氢离子表面转化材料的可行性分析  

Analysis of Feasibility for Diamond Like Carbon Films Using as Negative Hydrogen Ions Surface Conversion Materials

作　　者：李建[1,2] 童洪辉[1] 但敏[1] 金凡亚[1] 王坤[1,2] 陈伦江[1] LI Jian;TONG Hong-hui;DAN Min;JIN Fan-ya;WANG Kun;CHEN Lun-jiang(Southwestern Institute of Physics,Chengdu 610041,China;Engineering and Technical College of Chengdu University of Technology,Leshan 614007,China)

机构地区：[1]核工业西南物理研究院,四川成都610041 [2]成都理工大学工程技术学院,四川乐山614007

出　　处：《真空》2020年第4期6-10,共5页Vacuum

基　　金：国家自然科学基金重点项目(11535003);国家自然科学基金青年基金项目(11805058);成都理工大学工程技术学院院级基金项目(C122017040)。

摘　　要：负氢离子源已经成为核聚变装置中性束注入加热系统的首选离子源,优异的负氢离子表面转化材料是其中的关键。金刚石膜具有的负的电子亲合势使其具有优异的二次电子发射性能,进而使其成为可能的负氢离子源表面转化材料。在本论文中,介绍了负氢离子源的结构、工作过程和工作模式,在总结金刚石膜的二次电子发射理论和提高金刚石膜二次电子发射性能的方法的基础上,分析了类金刚石膜成为负氢离子表面转化材料的可行性:类金刚石膜以其同时具有的金刚石相和石墨相,兼具良好导电性和优异电子发射性能。在未来的负氢离子源中,类金刚石膜可能会成为用于负氢离子表面转化的优异可选材料。Negative hydrogen ions sources are the preferred ions sources of the neutral beam injection system for the fusion apparatus,in which perfect negative hydrogen ion surface conversion material is the key problem.Diamond films have perfect secondary electron emission properties because of its negative electron affinity.In this article,the structures,working process and modes of H-ions sources are introduced.The theory of secondary electron emission of diamond films and methods for enhancing the secondary electron emission properties are summarized.The feasibility of diamond like carbon films using as negative hydrogen ions surface conversion materials is analyzed.Diamond like carbon films have both diamond phase and graphite phase,which lead to the good electrical and electron emission properties.Therefore,in the future negative hydrogen ions source,it is expected that the diamond films may be the promising and optional surface conversion materials.

关 键 词：核聚变 负氢离子源 表面转化材料 类金刚石膜 磁过滤阴极真空弧 

分 类 号：O535[理学—等离子体物理]