真空インパルスアーク鉛イオンプラズマの伝播特性

抄録

Metal vapor plasma generated from a vacuum arc discharge expands into the surrounding space. The purpose of the present study is to know the basic physical properties and propagation characteristics of the metal vapor plasma generated from a short burning time impulse arc and to understand the relation between them. Here, lead cathode is used and lead ion plasma generated from an impulse arc with a burning time of 13 μs is taken as the research objective. The propagation velocity, electron temperature, electron density and potential of the expanding plasma are measured using an ordinary probe method. Spatial and time dependencies of the charge state distribution of lead ions in the expanding plasma are measured using Time of Flight method, and retarding effect of the grid potential against the propagation of the plasma is investigated.