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(a) LF and (c) rf plasma images for three different electrode positions. (b) LF and (d) rf plasma length variations when the electrode was inside from the Pyrex tube end.
Voltage and current waveforms and plasma light emission signal for (a) LF plasma at (dashed curve in the lower graph represents the conduction current waveform) and (b) rf plasma at . Total current vs voltage curves for (c) LF and (d) rf plasmas.
Plasma gas temperature plots for (a) LF and (b) rf plasmas.
Plasma emission spectrum of LF plasma (upper) at and rf plasma (lower) at .
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