Electrophysical and thermal parameters of an atmospheric pressure plasma jet in helium when excited by sinusoidal and pulsed voltages

Comparative studies of generation of cold plasma jet of atmospheric pressure in helium when excited by sinusoidal voltage and unipolar positive pulses at 2–6 kV for medical applications have been conducted. It is shown that the achieved parameters are identical, but the absence of the effect of frequency self-organization of streamer breakdown leading to irregularity in streamer propagation under pulse excitation makes it preferable in biophysical experiments. A limiting factor for plasma jet exposure is the achievable target temperature, which can be reduced by limiting the duration of the current.