Title :
Accurate models of collisions in glow discharge simulations
Author :
Hitchon, W.N.G. ; Parker, G.J. ; Lawler, J.E.
Author_Institution :
Eng. Res. Center for Plasma-Aided Manuf., Wisconsin Univ., Madison, WI, USA
fDate :
6/1/1994 12:00:00 AM
Abstract :
Very detailed, self-consistent kinetic glow discharge simulations are used to examine the effect of various models of collisional processes. The effects of allowing anisotropy in elastic electron collisions with neutral atoms instead of using the momentum transfer cross-section, the effects of using an isotropic distribution in inelastic electron-atom collisions, and the effects of including a Coulomb electron-electron collision operator are all described. It is shown that changes in any of the collisional models, especially the second and third described above, can make a profound difference in the simulation results. This confirms that many discharge simulations have great sensitivity to the physical and numerical approximations used. Our results reinforce the importance of using a kinetic theory approach with highly realistic models of various collisional processes
Keywords :
digital simulation; glow discharges; plasma collision processes; plasma kinetic theory; plasma simulation; Coulomb electron-electron collision operator; anisotropy; collisional models; collisional processes; elastic electron collisions; highly realistic models; inelastic electron-atom collisions; isotropic distribution; kinetic theory; momentum transfer cross-section; neutral atoms; self-consistent kinetic glow discharge simulations; simulation; Anisotropic magnetoresistance; Electrons; Glow discharges; Kinetic theory; Numerical simulation; Physics; Plasma materials processing; Plasma sources; Predictive models; Testing;
Journal_Title :
Plasma Science, IEEE Transactions on