The effect of electrode heating on the discharge parameters in complex plasma experiments

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Land, Victor
Carmona-Reyes, Jorge
Creel, James Ruell.
Schmoke, Jimmy
Cook, Mike
Matthews, Lorin Swint.
Hyde, Truell Wayne.
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IOP Publishing
Abstract

Thermophoresis is a tool often applied in complex plasma experiments. One of the usual stated benefits over other experimental tools is that electrode temperature changes required to induce thermophoresis do not directly influence the plasma parameters. From electronic data, plasma emission profiles in the sheath, and Langmuir probe data in the plasma bulk, we conclude that this assumption does not hold. An important effect on the levitation of dust particles in argon plasma is observed as well. The reason behind the changes in plasma parameters seems to be the change in neutral atom density accompanying the increased gas temperature while running at constant pressure.

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V. Land et al, Plasma Sources Sci. Technol. 20, 015026 (2011)