Numerical studies of the high power microwave breakdown in gas using the fluid model with a modified electron energy distribution function

Zhao, Pengcheng; Liao, Cheng; Lin, Wenbin; Chang, Lei; Fu, Haijun
October 2011
Physics of Plasmas;Oct2011, Vol. 18 Issue 10, p102111
Academic Journal
A modified electron energy distribution function (EEDF) is introduced into the fluid model and its effects on the high power microwave (HPM) breakdown in air and argon are investigated. A proper numerical scheme for the finite-difference time-domain method is employed to solve the fluid model. Numerical simulations show that the HPM breakdown time in argon predicted by the fluid model with the modified EEDF agrees well with the results of Particle-in-cell-Monte Carlo collision simulations, while the Maxwellian EEDF results in faster HPM breakdown when the mean electron energy is less than 20 eV. We also confirm that the Maxwellian EEDF can be used in the fluid model for simulating the air breakdown at the low frequencies based on the reported experiments.


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