Numerical Study on the Interaction between High-Power Microwave and Plasma

It is known that plasma can absorb and reflect high- power microwave (HPM) energy through polarization and collision. In this study, influences of microwave frequency, initial electron density and different plasma structures on the protection performance against HPM are numerically investigated. The results show that under the effect of strong electric field of HPM, nonlinear effect in plasma is obvious and the gas breakdown makes the electron density increased, which leads to the attenuation enhancement of HPM and further weakens the energy of wave transmission. It can also be obtained that bi-layer plasma structure has a better attenuation performance than single-layer structure.