Abstract
Atmospheric-pressure glow plasmas in air or other gases are attractive for industrial plasma processing, but attempts to obtain large-volume plasmas are plagued with filamentation due to transverse plasma instability. A method to prevent transverse instability of DC glow discharges using a resistive barrier is presented. Experimental data on current-voltage characteristics, light intensity versus time, and quantitative striation measurements indicate that the plasma is a true DC glow discharge which shows some longitudinal instability, but is transversely stabilized by a barrier with resistivity in the 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sup> -10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sup> Ω-m range. A finite-element model of the discharge's electric field elucidates the mechanism of transverse stabilization.
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