DC-driven atmospheric pressure pulsed discharge with volume-distributed filaments in a coaxial electrode system.

A nonthermal atmospheric pressure plasma source based on a dc-driven intermittent spark discharge in a coaxial electrode configuration with volumetrically distributed discharge filaments is presented. Spreading the intermittent spark discharge over the volume of the cylindrical discharge chamber is achieved owing to the mutual action of acoustic and magnetic fields on the discharge. The magnetic field scans discharge filaments over the cross section of the cylindrical electrode, while the acoustic field spreads the discharge along the electrode. Electrical parameters and characteristics of the developed nonthermal atmospheric pressure plasma source with volumetrically distributed plasma microchannels are presented. [ABSTRACT FROM AUTHOR]