Numerical Simulation Of The Plasma Discharge Crossatron Modulator Switching Process

Cold cathode plasma modulation switching has an important position inthe application of pulse current modulation switch. As a new type of plasmapulse power discharge, Plasma discharge CROSSATRON modulator switch isrealized conduction on the basis of the DC glow discharge theory, and theplasma is produced by electric and magnetic fields.For low jitter, short pulse edge, large load power and short recoverytime are required on the pulse modulation switch. Meanwhile, the physicalproperties of hydrogen can meet these conditions. In this paper, it gives asystematically and quantitative analysis to the hydrogen plasma discharge andthe formation of hydrogen plasma.A two-dimensional model of the weakly-ionized hydrogen direct-current(DC) discharge in the low pressure was established. According to gasdischarge theory, considering the continuity equation of charged particles,Poisson equation as well as Maxwell equations in electromagnetic cross field,the finite element method is used to simulate the process of modulation switch.The main reactions in hydrogen, the impact of pressure on the PCMS process, and the various factors affecting breakdown process and so on, these problemsare analysis in detail. These results will offer theoretic reference for hydrogendischarge simulation and geometry design optimization of cold cathodeelectric vacuum device. At the same time, the relevant parameters of PCMSprocess are tested, and the test results are fitted well with the simulation.