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Stabilization of the ionization overheating thermal instability in atmospheric pressure microplasmas
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10.1063/1.3143781
/content/aip/journal/jap/106/1/10.1063/1.3143781
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/1/10.1063/1.3143781

Figures

Image of FIG. 1.
FIG. 1.

Schematic of electric circuit used to generate the microplasmas and for stability analysis.

Image of FIG. 2.
FIG. 2.

The rms voltage-current characteristic for dc microplasma glow discharge is atmospheric pressure hydrogen showing transition from unstable∕oscillating to stable modes and corresponding change in the appearance of the discharge (insets). For the discharge images shown, the anode is a wire at the top of the image and the cathode is a plate at the bottom.

Image of FIG. 3.
FIG. 3.

Current wave form during unstable operation of a dc glow discharge in atmospheric pressure air. The inset shows higher temporal resolution measurement.

Image of FIG. 4.
FIG. 4.

Images of atmospheric pressure microplasmas in helium (a) stable with only nominal parasitic capacitance and (b) unstable with capacitor in parallel with discharge. The rms current was for both discharges.

Image of FIG. 5.
FIG. 5.

Micrographs of deposited amorphous carbon from atmospheric pressure mixture in case of (a) unstabilized and (b) external circuit stabilized microplasmas. Magnification in both images is the same.

Tables

Generic image for table
Table I.

Discharge parameters, estimations of instability growth rates, and related parameters for a , discharge gap in various gases.

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/content/aip/journal/jap/106/1/10.1063/1.3143781
2009-07-08
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Stabilization of the ionization overheating thermal instability in atmospheric pressure microplasmas
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/1/10.1063/1.3143781
10.1063/1.3143781
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