提出并研究了波导内场增强法测量微波气体击穿的实验方案,在密闭波导内加金属针实现电场增强,通过调节微波源辐射功率及两针距离,使微波传输达到气体击穿的条件.介绍了实验原理及诊断方法,进行了频率2.86 GHz、脉宽180 ns的微波在0.1 MPa空气中的击穿实验,分析了实验中得到的典型波形.结果表明实验现象与设计吻合,验证了该方案研究微波气体击穿的可行性.%The paper proposes and studies an experimental scheme that tests microwave gas breakdown by enhancing electric field. The electric field enhancement is realized through two metal pins placed parallel to the field polarization direction in the middle of the waveguide, and air breakdown can be gotten by adjusting the power of the microwave source and the distance between the two metal pins. The experimental principle and corresponding diagnostic method are introduced. Air breakdown experiments have been conducted under 0. 1 Mpa with 2. 86 GHz microwave of 180 ns pulse duration. The results derived agree with theoretical design, validating the feasibility of the experimental scheme.
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