红外与激光工程, 2017, 46 (9): 0917008, 网络出版: 2017-11-17  

双层等离子体对6 GHz高功率微波防护实验

Experiment on protection performance of two-layer plasma to 6 GHz high-power microwave
作者单位
脉冲功率激光技术国家重点实验室, 安徽 合肥 230037
摘要
针对高功率微波对电子设备的安全威胁, 设计了一种双层柱状等离子体阵列对高功率微波进行防护。其中单根等离子体柱的直径为25.4 mm, 长度为600 mm, 等离子体频率与碰撞频率可进行控制。利用搭建的实验测量系统, 研究了微波极化方向、等离子体电子密度、放电单元层数等因素对高功率微波透射衰减的影响。实验结果表明: 当高功率微波未激发等离子体产生非线性效应时, TM极化时的防护效果优于TE极化时的防护效果, 且能量衰减分别可达20.9 dB和14.7 dB; 随等离子体电子密度增大, 微波透射功率减小, 防护效果增强; 由于层间反射作用, 双层等离子体对高功率微波的透射衰减远大于单层等离子体衰减值的两倍。
Abstract
For the safety of electronic equipment, a two-layer barrier of cylindrical plasma array was designed to block high-power microwave(HPM). The reasonable parameters of plasma column in this experiment was designed and prepared, the diameter of single column were 25.4 mm, the length of it was 600 mm, and the plasma frequency and collision frequency were tunable according to the experiment′s need. The influence of microwave polarization, the plasma electron density, and number of the discharge unit on the performance of protection to HPM were analyzed and tested. The results indicate that the protection effect of plasma array with TM polarization is better than it with TE polarization when there is no nonlinear effect. The energy attenuation value can reach 20.9 dB and 14.7 dB respectively. The microwave transmission power decreased with the increasing of electron density to improve the protection effect. The results also show that transmission attenuation of HPM in two-layer structure is two times greater than it in one-layer structure because of the interlayer reflection.

刘洋, 时家明, 程立, 李志刚, 张继魁, 曾杰. 双层等离子体对6 GHz高功率微波防护实验[J]. 红外与激光工程, 2017, 46(9): 0917008. Liu Yang, Shi Jiaming, Cheng Li, Li Zhigang, Zhang Jikui, Zeng Jie. Experiment on protection performance of two-layer plasma to 6 GHz high-power microwave[J]. Infrared and Laser Engineering, 2017, 46(9): 0917008.

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