A Gas Switch Triggered by Array Microhollow Cathode Discharge
A micro-hollow cathode, gas switch technology, applied in electrical components, circuits, spark gaps, etc., can solve the problems of difficult to achieve large-scale switch use, high trigger voltage, and difficulty in synchronizing triggering, and achieve reduced size and dielectric strength. requirements, small trigger energy, and the effect of miniaturization
Inactive Publication Date: 2017-11-17
FUDAN UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to propose a new type of gas discharge switch to solve the current traditional three-electrode field distortion and multi-pole and multi-channel gas switch. miniaturization problem
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[0024] Processing implementation of gas switch:
[0025] The main body structure of the gas switch realized by the present invention is cylindrical (refer to the attached figure 1), the main electrode of the switch is divided into upper and lower electrodes 4 and 7, which are distributed on the upper and lower sides of the outer insulating cylinder 6, and the inner middle of the outer insulating cylinder 6 is an array of micro-hollow cathode generators and gas inlet and outlet joints. The outer insulating cylinder is made of plexiglass. The reference dimensions are: cylinder height 90mm, cylinder wall thickness 15mm, internal and external diameters 56mm and 86mm respectively. Corresponding external dimensions can also be designed according to the specific working voltage and working environment. The anti-creepage thread on the external surface can be Correspondingly designed according to the voltage level; the main electrode of the switch is a solid cylinder with a diameter of...
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The invention belongs to the technical field of pulse power, and particularly relates to an array micro-hollow cathode discharge-triggered gas switch. The switch structure mainly comprises an external insulating cylinder, main electrodes, array micro-hollow cathode discharge generators, pneumatic connectors, connecting and reinforcing parts and the like. As a trigger of the gas switch, the array micro-hollow cathode discharge generator is of an anode-medium layer-cathode structure, and a plurality of micropore arrays are perforated on the array micro-hollow cathode discharge generator by laser. The generator carries out micro-hollow cathode discharge under the action of pulsed voltage, and by utilizing a large area of high-density electrons as initial induction electrons produced by array discharge, the breakdown conduction of the gas switch is realized ultimately. Because the trigger is implemented by adopting microplasma discharge, compared with the triggering mechanism of conventional three-electrode field distortion and multi-pole multi-channel switches, the gas switch requires low triggering voltage and little energy for triggering, which is favorable for the miniaturization of switch-triggered power supplies; moreover, multi-trigger multi-point synchronous triggering can realize the multi-channel breakdown conduction of the switch and decrease the conduction inductance of the gas switch.
Description
technical field [0001] The invention belongs to the technical field of pulse power, and in particular relates to a gas switch. Background technique [0002] The gas switch is a switch with gas as the insulating medium. Its main characteristics are high working voltage and strong flow capacity. It is widely used in high-power pulse power technology, and it is typically used in linear transformer drivers (Linear Transformer Driver, hereinafter referred to as LTD )superior. LTD is a pulse power source that uses multiple relatively low voltage modules to obtain high-voltage and high-current nanosecond pulses through induction voltage superposition technology. Large-scale LTD is composed of tens of thousands of discharge modules. demanding. At present, three-electrode field distortion or multi-pole and multi-channel switches are mostly used in LTD devices. The basic principle of triggering is to use the trigger pulse voltage to change the electric field distribution of the swit...
Claims
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IPC IPC(8): H01T14/00
CPCH01T14/00
Inventor 刘克富张成博邱剑余澜明童立青
Owner FUDAN UNIV