Experimental apparatus for acquiring large-area uniform discharge plasmas

Abstract

The invention relates to an experimental apparatus for acquiring large-area uniform discharge plasmas, which belongs to the technical field of plasmas. The experimental apparatus comprises a bipolar nanosecond pulse power supply, a reactor, multi-needle-to-plate electrodes, a gas distribution system, a spectral measurement system and a discharge measurement system, wherein the bipolar nanosecond pulse power supply drives dielectric barrier discharge of air and other gas mixtures among the multi-needle-to-plate electrodes in the reactor, and the gas mixtures are input to the reactor through the gas distribution system; the spectral measurement system collects photonic information of plasma discharge in real time and inputs the photonic information to a computer for spectral analysis; and the discharge measurement system collects discharge voltage and current of the high-voltage nanosecond pulse power supply in real time, and the discharge voltage and current are displayed through a digital oscilloscope. By virtue of the bipolar nanosecond narrow-pulse power supply, the large-area discharge plasmas are generated without a magnetic field; and the generated plasmas are uniform, diffusive, high in electron density, high in energy utilization ratio, low in energy consumption and easy to control in a discharge process.

Description

technical field [0001] The invention belongs to the field of plasma technology, and in particular relates to a dielectric barrier discharge plasma technology which is driven by a bipolar nanosecond pulse power supply under a multi-needle-plate electrode structure and obtains large-area low-temperature and uniform dielectric barrier discharge in air and mixed gases . technical background [0002] Traditionally, dielectric barrier discharge plasma is driven by AC power. Under the drive of AC power, the conditions for uniform and diffuse discharge of dielectric barrier discharge plasma in atmospheric pressure air are very harsh, and it is easy to convert into discharge modes such as sparks and arcs, and the gas High temperature, low energy utilization rate, serious damage to the material surface, high operating cost, etc., these shortcomings of discharge greatly restrict its industrial application, seriously affecting its industrial application. [0003] In the nanosecond puls...

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Problems solved by technology

[0005] In order to solve the problems of small discharge plasma area, uneven discharge, low energy utilization rate and lack of real-time diagnosis of discharge plasma characteristics, the present invention provides an experimental device for obtaining large-area uniform discharge plasma. Composition of second pulse power supply, reactor, multi-needle-plate electrode, gas distribution system, spectral measurement system and discharge measurement system

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