Mechanism of low-temperature helical streamer discharge driven by pulsed electromagnetic field

Under the condition of specific pulsed discharge parameters, mode conversion low-temperature plasma jet channel that originally propagates along a straight line will occur, forming three-dimensional helical channel. Unlike traditional wave discharge, there are no factors such as an external constant magnetic field destroys poloidal symmetry dielectric tube, and chiral direction streamer change with parameters. In order to understand in depth electromagnetic mechanism structure jet, source influencing electric leads shape determines chirality this new type we analyze complex characteristics streamer, direction, pitch, branching, by establishing self-consistent theoretical model. It is found phase has effect on selection electron density influence pitch repetition frequency bifurcation point. The above their scientific significance exploring interaction plasma, also providing experimental support for application plasma.