Electron kinetics in atmospheric-pressure argon and nitrogen microwave microdischarges
Abstract
Electron kinetics in atmospheric-pressure argon and nitrogen microwave (4 GHz) microdischarges is studied using a self-consistent one-dimensional Particle-in-Cell Monte Carlo Collisions model. The reversal of electric field (i.e., inverted sheath formation) is obtained in nitrogen and is not obtained in argon. This is explained by the different energy dependencies of electron-neutral collision cross sections in atomic and molecular gases and, as a consequence, different drag force acting on electrons. A non-local behavior of electron energy distribution function is obtained in both gases owing to electrons are generated in the plasma sheath. In both gases, electron energy relaxation length is comparable with the interelectrode gap, and therefore, they penetrate the plasma bulk with large energies.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 27, 2016
- Source ID
- 10.1063/1.4947522
Entities
People
- Dmitry Levko
- Laxminarayan L. Raja
Organizations
- Air Force Office of Scientific Research
- University of Texas at Austin