外加磁场、电流及弧柱半径对电弧螺旋不稳定性的影响

The effect of external magnetic field, current and arc column radius on the arc helical instability

采用与时间有关的线性微扰理论 ,研究了存在气流作用下 ,外加磁场、弧电流以及弧柱半径对电弧螺旋不稳定性的影响 。

The effect of external magnetic field, current and arc column radius on the helical instability is studied by using linear time perturbation theory in this paper. The arc has the effect of gas flow. The stability conditions and the growth rate of the helical instability are given.