真空弧离子源的电阻触发工作方式  

Method of triggering the vacuum arc ion source with a resistor

作　　者：郑乐[1] 蓝朝晖[1] 龙继东[1] 彭宇飞[1] 李杰[1] 杨振[1] 董攀[1] 石金水[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,绵阳621900

出　　处：《核技术》2014年第1期20-23,共4页Nuclear Techniques

基　　金：国家自然科学基金(11105130;11305162)资助

摘　　要：介绍了真空弧离子源的一种电阻触发工作方式。有别于典型金属蒸汽真空弧(Metal vapor vacuum arc,MEVVA)离子源的触发工作方式,该方式不需要高压触发脉冲发生器和高压隔离脉冲变压器,简化了电源系统。实验测量了采用电阻触法20-200A主弧电流下的引出离子流,结果表明离子流随主弧流增大。研究了不同阻值触发电阻的起弧情况,实验结果表明在一定电阻阻值范围内,触发电阻越大,触发越难成功。电阻增大使得触发时间增长,主弧上升沿变缓,但是对引出的离子流几乎没有影响。Background： The metal vapor vacuum arc （MEVVA） ion source is a common source which provides strong metal ion flow. To trigger this ion source, a high-voltage trigger pulse generator and a high-voltage isolation pulse transformer are needed, which makes the power supply system complex. Purpose： To simplify the power supply system, a trigger method with a resistor was introduced, and some characteristics of this method were studied. Methods： The ion flow provided by different main arc current was measured, as well as the trigger current. The main arc current and the ion current were recorded with different trigger resistances. Results： Experimental results showed that, within a certain range of resistances, the larger the resistance value, the more difficult it was to success fully trigger the source. Meanwhile, the main arc rising edge became slower on the increasing in the trigger time. However, the resistance value increment had hardly impact on the intensity of ion flow extracted in the end. The ion flow became stronger with the increasing main arc current. Conclusion： The power supply system of ion source is simplified by using the trigger method with a resistor. Only a suitable resistor was needed to complete the conversion process from trigger to arc initiating.

关 键 词：真空弧 离子源 触发 离子流 

分 类 号：TL503.3[核科学技术—核技术及应用]