高功率微波在等离子体填充波导中的传播特性

Propagation characteristics of a high-power microwave in plasma-filled waveguide

在考虑有质动力情况下对高功率微波在等离子体填充波导中的传播特性进行了理论分析和数值计算,研究了高功率微波在等离子体中的传播特性和微波场强与等离子体密度分布之间的关系。结果表明高功率微波的有质动力将影响微波色散特性,使微波场强分布偏离Bessel分布,并对等离子体有排开作用,当场强足够大时可将波导中心处等离子体排空形成低密度通道。

Considering the ponderomotive force, the high-power microwave propagation in waveguide filled with plasma is analyzed and simulated. The propagation characteristics of the high-power microwave and the relationship between the power of the microwave and the distribution of the plasma density are researched. The results show that the ponderomotive force of high- power microwave would affect the dispersion, make the distribution of microwave different from Bessel distribution, and drive the plasma to the region where the microwave field is lower. When the microwave filed is sufficiently large, the low plasma density channel would form in the axial region.