Multi-gap series direct current gas switch with low triggering threshold

Abstract

The invention relates to a multi-gap series direct current gas switch with low triggering threshold. The gas switch comprises an outer cavity of a switch, an electrode supporting structure, a triggering introduction structure, a resistor-capacitor network and an ultraviolet preionization structure. The invention provides an integrated design of resistor-capacitor network and electrode support structure, integrated design of ultraviolet preionization structure and trigger lead-in structure; the electrode supporting structure and the resistor-capacitor network comprise an internal insulating cylinder, an upper high-voltage electrode, a lower high-voltage electrode, an odd number of intermediate electrodes, a voltage-equalizing resistor line, an upper end face electrode, a lower end face electrode, a plurality of connection terminals and at least one capacitor. A DC gas switch with multiple gaps in series solves the technical problem that the trigger threshold of the existing gas switch cannot meet the demand, integrates the design of the ultraviolet preionization structure, the resistance-capacitance network and the gas switch, so that the performance of the switch is obviously improved, and has good application prospect in a linear transformer driving source (LTD).

Description

technical field [0001] The invention relates to a multi-gap series DC gas switch. Background technique [0002] The gas switch has the characteristics of high withstand voltage, strong flow, fast response, low loss, low inductance, and simple structure. It is widely used in pulse power sources such as fast pulse linear transformer drive (FLTD) and MARX generators. FLTD can directly generate high-power pulses at the leading edge of hundreds of nanoseconds, and has important application prospects in the research of Z-pinch inertial confinement fusion, high energy density physics and other fields. In the FLTD type pulse drive source, the number of switches is large and needs to be accurately triggered and closed according to a certain timing, so FLTD puts forward extremely high requirements on the performance of the gas switch. At present, the gas switch cannot meet the demand in terms of self-discharge probability, life span and trigger threshold, which has become one of the ...

AI Technical Summary

Problems solved by technology

[0008] In order to further reduce the trigger threshold of the multi-gap series DC gas switch and solve many technical problems existing in the existing gas switch capacitor and resistor network where multiple discrete components are connected in parallel outside the switch, the present invention proposes a low trigger threshold multi-gap series connection DC gas switch

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