Pre-ionization trigger rod and gas switch using the trigger rod

Abstract

The invention relates to a pre-ionization trigger rod and a gas switch employing the same. A pre-ionization trigger needle and a high-voltage isolation resistor are integrally designed and are directly matched with a trigger electrode to achieve the purposes of trigger simplification and compact structure. The structure of the pre-ionization trigger rod comprises a ceramic insulation tube, a trigger needle, a high-voltage resistor and a metal sleeve ring, wherein the trigger needle comprises a front-end electrode, an intermediate needle rod and a rear-end needle tip, the intermediate needle rod of the trigger needle is inserted into a ceramic insulation tube, one end of the ceramic insulation tube is exposed out of the rear-end needle tip, the other end of the ceramic insulation tube is embedded into the front-end electrode of the trigger needle, the metal sleeve ring sleeves the outer surface of the ceramic insulation tube, the high-voltage resistor is further arranged on the outer surface of the ceramic insulation tube, one end of the high-voltage resistor is connected with the front-end electrode, and the other end of the high-voltage resistor is connected with the metal sleevering.

Description

technical field [0001] The invention relates to a pre-ionization trigger rod and a gas switch using the trigger rod. Background technique [0002] Gas switches are widely used in the field of pulse power technology, and the switching characteristics have a decisive impact on the output parameters and working conditions of pulse power drive sources. A gas switch with short trigger delay and small jitter is the goal pursued by many pulse power applications. Pre-ionization triggering is an effective method to reduce the delay and jitter of switch triggering. Its impact mechanism is: the formation of plasma by pre-ionization can directly provide initial electrons for the development of gap breakdown, and the ultraviolet light generated by pre-ionization discharge can cause space photoelectricity. The ionization and the photoelectric effect of the cathode are beneficial to the trigger breakdown of the gas gap and improve the trigger performance of the switch. [0003] There are...

AI Technical Summary

Problems solved by technology

This method avoids the ablation of the trigger pin, but the switch breakdown mode is unstable, and the breakdown time of the pre-ionization gap is greatly affected by factors such as the resistance value of the resistor and the position of the ring electrode.

[0007] 3. A self-coupling pre-ionized gas switch structure, see references [5-6] for details. Although the trigger structure is simplified to a certain extent, it is only used in high-voltage pulse gas switches

[0008] Therefore, the current pre-ionization switch structure is not compact enough, the discharge is not stable enough and other problems limit the application of this structure

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