为了寻求可用于快前沿直线型变压器驱动源最理想的多间隙气体开关结构，利用有限元分析软件模拟计算了几种不同电极结构气体开关内各间隙在开关触发前后的电场分布，并利用新型开关电路模型研究了气体开关触发导通前均压措施对开关内部各间隙电场分布均匀性的影响，以及触发后各中间电极对主电极杂散电容与气体开关内电场分布规律之间的关系。结果表明：圆形环状结构电极有利于形成稳定的多通道放电，降低开关的电感及抖动；在开关各个间隙之间并联相同阻值的电阻可以有效地改善开关直流耐压特性；在开关触发导通时，各间隙的电压分布主要与触发电压的上升时间、各个电阻及杂散电容值有关；触发电压的上升时间越短，杂散电容值对间隙电压分布的影响越明显。

In order to optimize the structure of multi-gap gas switch used in fast linear transformer driver(FLTD) module, the electric field distribution of gas switches with different structured electrodes before and after trigger were simulated. The effect of pressure balance measures on the electric field distribution of the gaps in the gas switch before trigger was studied by applying the new circuit model of the gas switch. Moreover, the relationship between the stray capacitances of the middle electrodes and the electric field distribution in the gas switch after trigger was studied. The results show that the ring electrode of circular section is conducive to the formation of a stable multi-channel discharge, and it can reduce the switch inductance and jitter; the DC voltage characteristics of the switch can be effectively improved by using the resistor of the same resistance in parallel between the gaps. At the trigger moment, the voltage distribution of each gap is mainly related to the trigger voltage rise time, the resistance and stray capacitance, and the shorter the trigger voltage rise time is, the more obvious the effect of the stray capacitance on the gap voltage distribution is.