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Frequency spectra obtained by applying FFT to the self-bias signal in (a) dusty and (b) dust-free plasmas. The recorded electrical signal measured on the probe in dusty plasma is reported inset (a).
Evolution of (a) P1 peak position as a function of microwave power and (b) of P2 peak position with acetylene flow rate and with the pressure.
Time evolution of (a) P1 and (b) P2 peak positions in a dusty plasma (experiment 3). The saturation reached at about 100 s in P2 time evolution is in good agreement with the first observation of dust particles at naked eyes.
Experimental conditions used during the self-bias voltage measurements.
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