Title :
Self-Consistent Modeling of the Effect of Wall-Neutral Reactions on Parallel Plate Radio Frequency Discharge Plasma in Pure Hydrogen
Author :
Diomede, Paola ; Hassouni, Khaled ; Longo, Savino ; Capitelli, Mario
Author_Institution :
Univ. of Bari, Bari
Abstract :
A hybrid model (charged particles/neutral fluid) is used in studying the effect of wall-neutral reactions on the charged particle kinetics of parallel plate radio frequency discharge plasmas in pure hydrogen. These effects are due to the strong sensitivity of the H- production rate to the vibrational distribution function of H2 molecules. In particular, the effects of heterogeneous H recombination, vibrational deactivation, and recombination to vibrationally excited molecules are studied. Depending on the assumptions on such reactions, the simulated H2 plasma can behave like an electropositive or an electronegative one, and space distribution of charged particles is consistently affected.
Keywords :
high-frequency discharges; hydrogen neutral molecules; plasma kinetic theory; plasma simulation; plasma-wall interactions; vibrational states; H2 - Element; charged particle kinetics; charged particle space distribution; charged particle-neutral fluid; heterogeneous recombination; hybrid model; parallel plate radio frequency discharge plasma; self-consistent modeling; vibrational deactivation; vibrational distribution function; vibrationally excited molecules; wall-neutral reactions; Distribution functions; Hydrogen; Kinetic theory; Plasma materials processing; Plasma properties; Plasma simulation; Plasma temperature; Plasma transport processes; Production; Radio frequency; Monte Carlo collisions; particle-in-cell simulation; surface catalysis; vibrational kinetics;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2007.901899
