Linear arrays of stable atmospheric pressure microplasmas

Zhi-Bo Zhang; Hopwood, Jeffrey
October 2009
Applied Physics Letters;10/19/2009, Vol. 95 Issue 16, p161502
Academic Journal
Microdischarges produce cold atmospheric plasma when the discharge current is limited by the quenching of a microwave resonator. A quarter-wavelength microstripline resonator is shown to support stable atmospheric microplasma in pure argon. Electrical characterization of the microplasma shows that its impedance is resistive and capacitive (Zp=500-j900 Ω). An array of these linear resonators generates a stable, line-shaped microplasma operating from a single power source due to close-coupling among adjacent resonators. Both simulations and experiments confirm that coupled-mode theory describes the collective behavior of linear microplasma arrays.


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