Electrode structure for gas spark switch and design method

Abstract

The invention relates to an electrode structure for a gas spark switch and a design method. The electrode structure can regulate formation amount and occurrence region of a gas clearance spark discharging channel, and then an aim of stabilizing the multi-channel discharging by the gas spark switch is achieved. The electrode structure comprises N low work function electrode material blocks and N high work function electrode material blocks which are alternately arranged; the amount of the N is determined according to the discharging channel amount capable of being produced by the electrode material blocks with high transmission efficiency, and N is not less than 1; the design method of the electrode comprises the following steps: 1) determining the materials of the low work function electrode material block and the high work function electrode material block; 2) determining the amount of the low work function electrode material blocs and the high low work function electrode material block; and 3) assembling.

Description

technical field [0001] The gas switch of the invention relates to a gas switch distinguished by the structure and components of electrodes, in particular to an electrode structure and design method for a gas spark switch. Background technique [0002] Pulse power technology is an electrophysical technology that stores energy at low power and releases it to a specific load with high-power pulse electromagnetic energy. [0003] The gas spark switch has the advantages of high withstand voltage and large conduction current, and is widely used in the field of pulse power technology. Its inductance parameters and service life are important factors affecting the output performance and working status of pulse power drive sources. Therefore, some Large pulse power devices or compact driving sources have put forward strict requirements for "low inductance" and "long life" for switches. If the switch can form a stable multi-channel discharge, it will effectively increase the discharge...

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Problems solved by technology

[0006] It is also possible to directly inject external electrons into the gap of the gas switch to increase the number of initial electrons and the number of discharge channels in the gap. The current feasible methods include plasma injection and array microporous cathode discharge. Xi'an Jiaotong University and Fudan University adopt these methods to design A switch that can form a multi-channel discharge has been developed, but the problems of this type of switch are that the mechanical structure and working circuit are complex, the operating voltage is low, and the service life is short. For details, see the cited literature [12-13]

[0007] Studies have found that multi-gap switches are easy to form multi-channel discharges. Scholars from many countries have carried out research on the development and characteristics of this type of switches. They have found that there are multiple gap discharge channels with different numbers, and it is difficult for all gap discharge channels to form continuous discharge channels in the axial direction. Straight line path, the distribution of multiple channels is relatively concentrated, etc., which causes the current to flow along the direction of the electrode circumference, which increases the inductance of the discharge circuit, resulting in the problem of unstable multi-channel discharge of the gas spark switch. See the cited literature for details. 【14-17】

[0008] In short, the current technical means cannot achieve the purpose of effectively forming a stable multi-channel discharge without affecting other important characteristics or conditions of use of the switch.

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