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气体开关前沿陡化的实验研究
Experimental investigation in pulse edge of gas spark switch
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摘要: 气体开关是脉冲功率技术中广泛应用的关键部件之一，高功率、高性能气体开关的技术研究及设计具有重要意义，陡化前沿是开关技术研究的重要内容。分析了气体开关的击穿机理和击穿通道的分布规律。对气体开关充分“老练”，开关击穿点和击穿通道将相对稳定，实验研究了开关间距和电场对脉冲前沿的影响。击穿电场较低时，减小开关间距有利于陡化脉冲前沿；击穿电场较大时(大于180 kV/cm)，开关间隙(电感)对输出脉冲前沿的影响减弱，气体开关的击穿电场成为影响输出脉冲前沿的关键因素。研究结果表明，增大开关的击穿场强，是陡化开关脉冲前沿的有效途径。Abstract: Gas switch is one of the key components widely used in pulsed power devices.Research and design of high pow-er,high performance gas switch have important significance.Speed up the pulse front is an important part of switch technology research.This paper analyzes the distribution law of gas switch breakdown channel.The gas switch fully“sophisticated”,switch breakdown and the breakdown channel will be relatively stable.When the breakdown field is low,reducing the switch gap will be beneficial for pulse sharpening.When the breakdown field is large (greater than 180 kV/cm),switch gap (inductor)has little in-fluence on front edge of output pulse.Breakdown of gas switch is the key factor to influence the forefront of the output pulse.Re-search results show that increasing the breakdown field strength is an effective way to sharpening the pulse edge up.
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