Modeling characterisation of a bipolar pulsed discharge

Abstract

We apply particle based kinetic simulations to explore the characteristics of a low-pressure gas discharge driven by high-voltage ( $\sim$ kV) pulses with alternating polarity, with a duty cycle of $\approx$ 1% and a repetition rate of 5 kHz. The computations allow tracing the spatio-temporal development of several discharge characteristics, the potential and electric field distributions, charged particle densities and fluxes, the mean ion energy at the electrode surfaces, etc. As such discharges have important surface processing applications, e.g. in the treatment of artificial bones, we analyse the time-dependence of the flux and the mean energy of the ions reaching the electrode surfaces, which can be both conducting and dielectric. Our investigations are conducted for argon buffer gas in the 40-140 Pa pressure range, for 1-5 cm electrode gaps and voltage pulse amplitudes ranging between 600 V and 1200 V.

References in corpus (4)

• Ion energy and angular distributions in low-pressure capacitive oxygen RF discharges driven by tailored voltage waveforms
• A computationally assisted spectroscopic technique to measure secondary electron emission coefficients in radio frequency plasmas
• The effect of photoemission on nanosecond helium microdischarges at atmospheric pressure
• Effects of excitation voltage pulse shape on the characteristics of atmospheric-pressure nanosecond discharges