Spatio-temporal analysis of electron power absorption in low pressure CCPs operated in O2

The power absorption in electronegative CCPs at low pressures indicates complex electron dynamics that are still not fully understood. Therefore we present a spatio-temporally resolved analysis of electron power absorption in low pressure oxygen CCPs based on the first two moments of the Boltzmann-equation [1]. The spatio-temporal results are obtained self-consistently from 1d3v Particle-In-Cell / Monte Carlo Collision simulations. In contrast to typical theoretical models of electron heating, we observe significant ohmic heating and an attenuation of ambipolar heating at low pressures due to the strong electronegativity of the discharge. \\ \\$[1]$ Schulze J, Donk\'o Z, Lafleur T, Wilczek S, Brinkmann R P 2018 {\it Plasma Sources Sci. Technol.} {\bf 27}(5) 055010