Published January 27, 2003
| Version v1
Journal article
Structure of direct-current microdischarge plasmas in helium
- 1. Department of Aerospace Engineering and Engineering Mechanics, University of Texas at Austin, Austin, Texas 78712 (United States)
Description
A one-dimensional, self-consistent, continuum model is used to elucidate plasma phenomena in a parallel-plate dc microdischarge with a 250 μm gap at a pressure of 250 Torr. The microdischarge is found to have a bulk plasma region and a cathode sheath region with sizes that are comparable. Depending on the discharge current densities, peak electron densities of order up to 1014 cm-3 are predicted. Electron temperature of several eV are predicted within the cathode sheath while temperatures between 2 and 3 eV are observed in the bulk plasma. Gas temperatures of the order of 1000 K are predicted, emphasizing the importance of gas heating phenomena in dc microdischarges
Additional details
Identifiers
- DOI
- 10.1063/1.1540246;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 82
- Journal Issue
- 4
- Journal Page Range
- p. 529-531
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35041585
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- CURRENT DENSITY; ELECTRIC DISCHARGES; ELECTRON DENSITY; HELIUM; PLASMA; PLASMA DIAGNOSTICS; PLASMA PRESSURE; PLASMA SHEATH; PRESSURE RANGE KILO PA; TEMPERATURE RANGE 1000-4000 K
- Descriptors DEC
- ELEMENTS; FLUIDS; GASES; NONMETALS; PRESSURE RANGE; RARE GASES; TEMPERATURE RANGE
Optional Information
- Notes
- (c) 2003 American Institute of Physics.