Journal article
Collisional plasma sheath model
Physics of fluids. B, Plasma physics, Vol.3(10), pp.2796-2804
10/1991
DOI: 10.1063/1.859987
Abstract
The effects of ion collisionality on the plasma sheath are revealed by a two‐fluid model. In contrast to previous work, the ion–neutral collision cross section is modeled using a power law dependence on ion energy. Exact numerical solutions of the model are used to determine the collisional dependence of the sheath width and the ion impact energy at the wall. Approximate analytical solutions appropriate for the collisionless and collisionally dominated regimes are derived. These approximate solutions are used to find the amount of collisionality at the center of the transition regime separating the collisionless and collisional regimes. For the constant ion mean‐free‐path case, the center of the transition regime for the sheath width is at a sheath width of five mean‐free paths. The center of the transition regime for the ion impact energy is at a sheath width of about one‐half of a mean‐free path.
Details
- Title: Subtitle
- Collisional plasma sheath model
- Creators
- T. E Sheridan - University of IowaJ Goree - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Physics of fluids. B, Plasma physics, Vol.3(10), pp.2796-2804
- DOI
- 10.1063/1.859987
- ISSN
- 0899-8221
- eISSN
- 2163-503X
- Number of pages
- 9
- Language
- English
- Date published
- 10/1991
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984199766902771
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