Is the negative glow plasma of a direct current glow discharge negatively charged?
Abstract
A classic problem in gas discharge physics is discussed: what is the sign of charge density in the negative glow region of a glow discharge? It is shown that traditional interpretations in text-books on gas discharge physics that states a negative charge of the negative glow plasma are based on analogies with a simple one-dimensional model of discharge. Because the real glow discharges with a positive column are always two-dimensional, the transversal (radial) term in divergence with the electric field can provide a non-monotonic axial profile of charge density in the plasma, while maintaining a positive sign. The numerical calculation of glow discharge is presented, showing a positive space charge in the negative glow under conditions, where a one-dimensional model of the discharge would predict a negative space charge.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 01, 2015
- Source ID
- 10.1063/1.4907192
Entities
People
- A. A. Kudryavtsev
- A. И. Сайфутдинов
- E. A. Bogdanov
- Vladimir I. Demidov
Organizations
- Air Force Research Laboratory
- Saint Petersburg State University
- Saint Petersburg State University of Information Technologies, Mechanics and Optics
- West Virginia University