Behavioral characteristics of nanosecond pulsed discharge in coaxial electrodes

The environmental improvements by pulsed discharge plasma, a type of nonthermal plasma, have received much attention all over the world. The observation of discharge plasmas is beneficial for better understanding of the plasma physics of this growing field. Recently, nanosecond (ns) pulsed discharge...

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Bibliographic Details
Published in:Electrical engineering in Japan 2020-03, Vol.210 (1-4), p.19-28
Main Authors: Ryu, Terumasa, Wang, Douyan, Namihira, Takao
Format: Article
Language:English
Subjects:
coaxial electrode
Discharge
Electrodes
ICCD camera
nanosecond pulse
Parameters
Plasma
Plasma physics
Plasmas
primary streamer
Propagation velocity
Pulse duration
Pulse propagation
secondary streamer
Streamer gas discharge
Wire
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Summary:The environmental improvements by pulsed discharge plasma, a type of nonthermal plasma, have received much attention all over the world. The observation of discharge plasmas is beneficial for better understanding of the plasma physics of this growing field. Recently, nanosecond (ns) pulsed discharge with a short pulse duration of 5 ns achieved the higher energy efficiency on ozone generation and NO removal. However, the underlying mechanisms of these high efficiencies remain unclear. In the present study, the effects of electrode geometry on propagation process of ns pulsed discharge in coaxial electrodes were investigated using an ICCD camera. As the results, increasing wire diameters from 0.2 to 2.0 mm lead the different streamer discharge parameters; propagation velocity of streamer heads from 4.8 mm/ns to 12.5 mm/ns, peak of discharge current from 243 to 328 A, respectively. Therefore, it is concluded that the wire diameter is one of the paramount parameters to control the characteristics of the ns pulsed streamer discharge.
ISSN:0424-7760
1520-6416
DOI:10.1002/eej.23254