Nonlocal behavior of the excitation rate in highly collisional RF discharges

摘要: The present work focuses on the fundamental aspects of atmospheric pressure plasma electropositive discharges operated in ohmically heated mode, electron heating and excitation (ionization) rate. We find that two do not necessarily have similar profiles can show peaks at different locations, ionization rate being much more sensitive to electric field compared sensitivity heating. This suggests an explanation for discrepancies between power absorbed by electrons patterns previously reported literature observed study. profile then be explained analyzing overlapping profiles. Surprisingly, it has been discovered dynamics exhibits nonlocal behavior having maxima spatially separated from rate, a new effect mode. strong such leads large displacements component. produce significant charge separation close sheath or even bulk because are able follow adiabatically maintain quasineutrality owing high collisionality. In particular, this distortion structure increase there.