真空中不同极化电磁波在微波等离子体喷流中的衰减特性实验研究

在真空环境中，利用空间反射电磁波测量装置，开展微波等离子体喷流对垂直和水平极化电磁波衰减的实验研究，分析不同极化电磁波在等离子体中衰减的影响因素.实验结果表明：以氩气为工质，真空室中微波等离子体喷流对垂直和水平极化电磁波具有显著的吸收效应.发生器流量、功率以及实验真空度对垂直极化电磁波在等离子体中的衰减影响明显.真空度和发生器功率对水平极化电磁波没有显著影响. 关键词： 等离子体中的电磁波 等离子体基本性质 电磁波

Experimental study on attenuation of differently polarized wave by microwave plasma jet in vacuum

The microwave test method of space reflective wave was applied to study the attenuation characteristics of differently polarized wave scattered by microwave argon plasma jet in vacuum and its influencing factors. Experimental results show that in the 4—8GHz frequency area of testing wave, the plasma absorbs vertically and horizontally polarized wave obviously. The mass flow rate and power of generator and the background pressure affect the attenuation of vertically polarized wave. But the power of generator and degree of vacuum almost do not affect the horizontally polarized wave attenuation.