真空 ›› 2020, Vol. 57 ›› Issue (4): 6-10.doi: 10.13385/j.cnki.vacuum.2020.04.02
李建1,2, 童洪辉1, 但敏1, 金凡亚1, 王坤1,2, 陈伦江1
LI Jian1,2, TONG Hong-hui1, DAN Min1, JIN Fan-ya1, WANG Kun1,2, CHEN Lun-jiang1
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。
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