为研究真空环境下电磁场诱发针-板电晕放电特性，研制了电磁场发生器、真空系统、高压静电源、动态电位测试仪等组成的电磁场辐照诱发真空电晕放电模拟试验系统。该系统可实现真空管内气压为80 Pa的低真空环境，并利用此系统进行在电磁场的作用下的电晕放电试验，初步得到了电磁场辐照诱发电晕放电的阈值电压的变化规律。试验结果表明：当温度、湿度等其他环境因素基本不变，真空管内气压为80 Pa时, 正常放电阈值为-590 V, 利用负极性高压静电放电, 电压取值范围10~20 kV, 产生的电磁脉冲辐射作用于真空管内充电区域，可使放电阈值降低90~180 V。

In order to study the characteristics of the needle-plate corona discharge induced by the electromagnetic field in the vacuum environment, a simulation test system of corona discharge induced by the electromagnetic fields, such as the electromagnetic field generator, the vacuum system, the high voltage power supply, and the dynamic potential tester, is developed. The system can realize a low vacuum environment of 80 Pa, and we can use the system to carry out the corona discharge test under the action of the electromagnetic field. The change laws of the threshold voltage of corona discharge induced by electromagnetic field are obtained. The experimental results show that when the temperature, humidity and other environmental factors keep unchanged, the normal discharge threshold is -590 V. When the pressure of the vacuum tube is 80 Pa, the negative high voltage of electrostatic discharge could release a voltage from 10 kV to 20 kV. The electromagnetic pulse acts on the inner of the vacuum tube in the charging area, the discharge threshold will reduce 90-180 V.