微波等离子推进器的调试与地面实验

Regulation and ground test of microwave plasma thruster

介绍了微波等离子推力器系统的组成结构、微波等离子推力器工作原理,并结合实验现象及参数,论述了地面实验系统的启动与稳定工作过程,为微波推进系统提供一定的参考.利用光学放大原理实现的微推力的测量,给出了推力与激光点位置的函数曲线.实验得到:推力在不同的压强及微波源功率下均随着推进剂的质量流量增加而增加,而比功率正好相反,比冲随着质量流量的增加大致出现了先减少后上升的趋势.

This article introduced the structure of a microwave plasma thrust （MPT） system and the preliminary principles of MPT. Combined with the experimental phenomenon and parameters adjusted, this paper expounds the startup and steady working processes of MPT ground experimental system, which can offer a reference for the microwave thrust system. The micro-thrust was measured based on the principle of the optical magnification, and the thrust and the curve of thrust and laser location were given. From the experiment it can be known ： thrust increases with the increase of mass flow rate of propellants in different pressure and microwave power source, while the specific power is on the contrary. On the whole, the specific impulse wiU decrease first and then increase when the mass flow rate increases.