基于多物理的等离子体限幅器性能分析

The Performance Analysis on Plasma Limiter Based on the Multiphysics

初步构建了波导型等离子体限幅器，分析了低功率波入射条件下限幅器的传输特性；结合波动方程、带电粒子的传输方程以及波尔兹曼方程，构建了基于多物理的考察高功率微波入射条件下等离子体限幅器击穿过程的物理数学模型，并利用这一模型考察了限幅器中气体为Ar气、初始气压为10Torr，入射波频率为2．45GHz、功率为200w的高功率微波入射条件下，等离子体状态的演变和微波传输特性的变化过程，通过与文献的比较。验证了模型和结果的准确性。

The waveguide plasma limiter is constructed tentatively. The transmission perform- ance of the limiter is analyzed for low power incident wave. The multiphysics model based on combination of wave equations, transport equations of particles charged, and Boltzmann equa- tions is put forward to investigate breakdown process of the plasma limiter when high power mi- crowave is incoming. The evolution of plasma state and variance procedure of microwave trans- mission property are investigated for a plasma limiter filled with argon of initial pressure 10Tort, for the incident microwave frequency of 2.45GHz, with those in reference literature, which proves the power of 200W. The results are consistent validity of the model.