Multichannel gas spark switch based on ultraviolet preionization technology

Abstract

The invention relates to a multichannel gas spark switch based on an ultraviolet preionization technology. The multichannel gas spark switch comprises a main electrode I (1) and an electrode tip (12) thereof as well as a main electrode II (2) and a corresponding electrode tip (13) which are correspondingly arranged, and circular cylinder switch shells (3), wherein the main electrode I (1) is shaped as a circular flange plate, and the circular cylinder switch shells (3) are connected by fixing bolts (9). The multichannel gas spark switch disclosed by the invention has the advantages that due to adoption of structural design of the trigger electrodes, UV (ultraviolet) ionization can be generated under the triggering condition, so that richer initiating electrons are distributed in a main gap, the breakdown delay of the spark gap is shortened, and ring electrodes are induced to generate parallel-connection discharge of multiple channels to achieve the effects of reducing the on-off inductance, reducing the electrode ablation and prolonging the service life of the switch; and the switch is of an compact coaxial structure on the whole, and an extremely tiny gap is reserved between the main electrodes, so that the air pressure inside the switch is increased, the breakdown delay of the gap is effectively reduced, and meanwhile, the spark inductance is reduced, therefore the structure of a trigger pulse generator is simplified.

Description

technical field [0001] The invention relates to the field of high-voltage gas spark switch manufacturing, in particular to a multi-channel gas spark switch based on ultraviolet pre-ionization technology. Background technique [0002] The gas spark switch is the core component of the pulse power device. Its performance directly affects the output characteristics of the pulse power source. With the development of pulse power devices towards higher power and high repetition frequency, gas spark switches are required to have the characteristics of high withstand voltage, low inductance and jitter, and long life. When the gas switching gap forms multiple parallel discharge channels, it not only significantly reduces the current density of each discharge channel, reduces the ablation of the electrodes by the switching arc, prolongs the switching life, but also reduces the switching inductance and on-resistance . Therefore, multi-channel gas spark switches have begun to be widel...

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Problems solved by technology

[0004] Aiming at the problems that the existing multi-channel gas spark switch bears high voltage and high current, the discharge channel is single, the electrode ablation is serious and the switch inductance is large, etc., the present invention provides a multi-channel gas spark switch based on ultraviolet pre-ionization technology

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