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A gas switch structure based on low operating coefficient and low jitter trigger

A working coefficient, gas switch technology, applied in spark gaps, electrical components, spark gaps and other directions with auxiliary triggering devices, can solve problems such as the inability to meet the low working coefficient of FLTD, restrict the construction of large-scale pulse power devices, etc., to reduce the trigger shock. Wear time delay and jitter, reduce switching factor, small size effect

Active Publication Date: 2022-03-08
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] However, the current gas switch generally adopts field distortion gas switch, and its working coefficient is generally higher than 0.7, which cannot meet the requirements of FLTD for low working coefficient.
This severely restricts the construction of large pulse power devices based on FLTD technology

Method used

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  • A gas switch structure based on low operating coefficient and low jitter trigger

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Effect test

Embodiment 1

[0044] FLTD uses positive and negative polarity charging, and generates nanosecond-level large current pulses by reducing the inductance of the discharge loop. When multiple synchronous parallel outputs are used, the timing of current pulse generation needs to be precisely synchronized to achieve superposition of power peaks.

[0045] The three-electrode field distortion gas switch is used as the main discharge branch switch, the charging voltage is ±80kV, the capacity of the high-voltage pulse capacitor is 100nF, the leading edge of the current pulse generated by single branch discharge is 120ns, the peak current is 40kA, and the peak power is 5GW. In order to improve the trigger consistency when multiple branches are running in parallel, the switch structure proposed by the device of the present invention can reduce the working coefficient of the switch from 0.66 to 0.50, and at the same time keep the trigger jitter within 1.5ns, effectively improving the gas switch. work rel...

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Abstract

The invention discloses a gas switch structure triggered based on low working coefficient and low jitter. Main electrodes are respectively arranged on the upper and lower sides inside the insulating shell, a trigger electrode is arranged between the main electrodes on the upper and lower sides, and a middle electrode is arranged inside the trigger electrode. The energy storage capacitor, the intermediate energy storage capacitor is connected with a microporous capillary structure, and the intermediate energy storage capacitor is quickly charged by applying a trigger pulse. When the trigger pulse amplitude is higher than the breakdown voltage of the microporous capillary structure, the intermediate energy storage capacitor passes through The discharge of the microporous capillary structure forms a micro plasma jet, which realizes the trigger breakdown of the gas switch with an operating coefficient of less than 0.5 and a jitter of less than 1.5ns. The present invention introduces a micro plasma jet in the triggering breakdown process of the field distortion gas switch, realizes the synergistic effect of the pulse voltage and the plasma jet, and can reduce the working coefficient of the switch to below 0.5.

Description

technical field [0001] The invention belongs to the technical field of pulse power switches, and in particular relates to a gas switch structure which adopts microporous plasma jets to realize triggering with low working coefficient and low jitter. Background technique [0002] The gas switch has been widely used in the field of pulse power technology due to its advantages of stable performance, high working voltage, strong flow capacity and convenient regulation. Fast linear transformer pulse power drive source (FLTD) is recognized as the most promising technology route in the next generation of fast Z-pinch drive source. In order to obtain high peak power, hundreds of thousands of gas switches are required to work synchronously. Therefore, it is of great significance to study the low-jitter trigger structure under low operating coefficient for the construction of large-scale pulse power devices in the future. [0003] However, the current gas switch generally adopts a fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01T1/22H01T2/00
CPCH01T1/22H01T2/00
Inventor 陈立李兴文吴坚李鹏辉杨莉
Owner XI AN JIAOTONG UNIV
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