Influence of Jet Angle and Ion Density of Cathode Side on Low Current Vacuum Arc Characteristics

摘要

In this study,the influence of the initial jet angles (IJAs) and ion number densities(INDs) at the cathode side on the low current vacuum arc (LCVA) characteristics is simulated andanalysed.The results show that the ion temperature,electron temperature,ion number density,axial current density and plasma pressure all decrease with the increase of the cathode IJAs.Itis also shown that LCVA can cause a current constriction for lower cathode IND,and the anodesheath potential is more nonuniform,which is mainly related to the nonuniform distribution ofthe axial current density at the anode side.