A carbon fiber pulse power switch

Abstract

The present invention relates to a carbon fiber pulse power switch in the technical field of pulse power. Compared to a current spontaneous breakdown gas switch, the metal of a main emission area of ametal cathode electrode in the current spontaneous breakdown gas switch is replaced with a carbon fiber plate to improve the stability of the switch and prolong the life. The carbon fiber plate comprises a metal hole bottom plate, a plurality of carbon fiber bundles and a fixed pressure plate. The carbon fiber emission faces formed at the two end of the carbon fiber bundles are used to replace the metal emission surface of a traditional switch. According to the carbon fiber pulse power switch, the carbon fiber bundles are larger than the current metal electrode switch in the crystal whisker draw ratio and are better than the current metal electrode switch in the consistency of a field enhancement factor, and is better resistant to high temperature and enhancement factor, and greatly improves the stability and the life.

Description

technical field [0001] The invention belongs to the technical field of pulse power, and in particular relates to a carbon fiber pulse power switch. Background technique [0002] Pulse power technology is a technology for generating high-power, narrow-width electrical pulses, and has important applications in research fields such as electron beam accelerator physics, high-power microwave generation, and plasma physics. The pulse power system is a complex system. The pulse power switch is the core component of the pulse power system. Its function is to control the conduction or disconnection of the electrical circuit of the system. It should usually have a compact structure, long life, and short conduction delay. (current rise time), small turn-on delay jitter, strong flow capacity and so on. [0003] In the pulse power system, most of the pulse power switches commonly used use the breakdown characteristics of the insulating medium. Under the action of high-voltage pulses, t...

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Problems solved by technology

Due to the different sizes and uneven distribution of each whisker, the consistency of its field enhancement factor is poor, which makes the electron emission of the whiskers more random, resulting in the conduction delay of the self-breakdown switch (time t 1 with time t 0 The difference) is unstable and jittery; after the self-breakdown switch has been running for a long time, the length-to-diameter ratio of the whisker becomes smaller, which leads to a longer turn-on delay of the switch, and even finally increases the withstand voltage of the self-breakdown switch. However, it deviates from the expected design working voltage range, thus limiting the effective working life of the self-breakdown switch within the set parameter range

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