弗里曼源热阴极弧放电在高温下应用中的几个问题  

Several problems of Freeman source worked at high temperature with heated cathod and arc discharge

作　　者：郑思孝[1] 廖小东[1] 孙官清[1] 刘仲阳[1] 王培录[1] 杨兴富 

机构地区：[1]四川大学原子核科学技术研究所

出　　处：《核技术》1999年第2期103-108,共6页Nuclear Techniques

摘　　要：介绍弗里曼源在典型气体流量下弧室内、源缝口侧、引出缝口后３００ｍｍ处和监控处的真 空度间的关系，纯灯丝热和弧放电热引起的弧室内壁、料炉末端的温升分布特性，以及微渗水 蒸汽使高温灯丝氧化对放电特性的影响。同时研究了几种特殊气体放电的氦离子辅助以及灯丝 电极夹下垂引起的灯丝外短路问题。The vacuums in the arc chamber,the extracted region and the control positions of the Freeman source at typical gas-rates were measured.The temperature-raising distributions at the arc-charmber's wall and the oven end heated by the filament and arc discharge were obtained. The effect on discharge properties of the filament oxidation caused by micro-leakage of water vapour,and the effect of Ar+-assisted discharge on outside short circuit of the filament are discussed.

关 键 词：弗里曼离子源 引出区 弧放电 灯丝氧化 热阴极 

分 类 号：O462.1[理学—电子物理学]