Final Report for Award DE-FG02-99ER54554 Kinetics of Electron Fluxes in Low-Pressure Nonthermal Plasmas

Kortshagen, Uwe

University of Minnesota (United States)

关键词: Transport Electron Kinetics;    Pulsed Plasma;    70 Plasma Physics And Fusion Technology;    Kinetics;    Distribution Functions;   

DOI  :  10.2172/835052
RP-ID  :  DOE/ER/54554-1
RP-ID  :  FG02-99ER54554
RP-ID  :  835052

美国|英语

来源: UNT Digital Library

【 摘 要 】

This grant has focused on the study of several aspects of electron kinetics in low pressure plasmas. Entirely new effects arise from the fact that the electron kinetics is governed by non-local effects, in which the electron distribution function is not equilibrium with the local electric field but is governed by spatial transport effects. In this grant, we were able to demonstrate several previously un-studied effects which are a direct result of the nonlocal transport. These are: (1) The existence of a ''convective cell' in electron phase space. The phenomenon was observed and studied in CW plasma conditions. (2) The occurrence of non-collisional cooling of electrons through an effect known as ''diffusive cooling''.