Abstract
The nanosecond single pulse was employed here to generate a large volume glow discharge between the wire-plane electrodes in air. In order to find requirements on pulse waveform for generation of a large volume discharge at atmospheric pressure, the effect of pulse risetime, pulse width, and amplitude on glow discharge has been widely investigated in this paper. Results reveal that a large volume glow discharge can be generated in an inhomogeneous electric field under the single pulse with the faster risetime, the lower peak amplitude. The pulse width has almost no influence on the density of glow discharge, but which has a great influence on the transition from glow discharge to streamer discharge. A model of inter-shielding-effect has been proposed to explain the influence of waveform parameters on pulsed glow discharge.
Highlights
In order to find requirements on pulse waveform for generation of a large volume discharge at atmospheric pressure, the effect of pulse risetime, pulse width, and amplitude on glow discharge has been widely investigated in this paper
Results reveal that a large volume glow discharge can be generated in an inhomogeneous electric field under the single pulse with the faster risetime, the lower peak amplitude
The pulse width has almost no influence on the density of glow discharge, but which has a great influence on the transition from glow discharge to streamer discharge
Summary
Gas plasma generated by pulse discharge is widely used in ozone generation [1,2,3], detoxification of gaseous pollution [4,5,6], material surface treatment [7,8], synthesis of nanostructured material [9,10], etc. In order to improve the efficiency of the applications mentioned above, the homogeneous, large volume discharge is required. It can be seen that nanosecond pulse discharge in non-uniform electric field constructed by needles-plane or wire-plane electrodes is an efficient way to obtain large volume discharge. K. Hutcherson focused on the exhaust gas detoxification efficiency by large volume discharge under different pulse risetime and pulse width [11,12,13]. In order to find requirements on pulse waveform for generation of a large volume discharge at atmospheric pressure and understand more clearly the mechanism of pulsed discharge, a single pulse voltage with adjustable risetime, pulse width, amplitude etc is employed here to investigate the formation of the large volume discharge between the wire-plane electrodes with non-uniform electric field
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