In this study, the unsteady velocity function of the ions and electrons in the collisional presheath and collisionless sheath of a plasma near a completely absorbing wall are determined from a kinetic analysis. The
collisions in the presheath are modeled by a relaxtion time approximation (namely BGK model¡ABhatnagar-Gross-Krook ). The model and analysis from Emmert et al. are used to find the variation in electrostatic potential with position. Distribution functions of the ions and electrons in a collisionless presheath and sheath can be exactly obtained. Velocities of the ions in the presheath and sheath are highly non-Maxwell-Boltzmann distributions. The electrons in the presheath are close to Maxwell-Boltzmann distributions, but those in the sheath are non-Maxwell-Boltzmann distributions. The computed distribution functions for a completely absorbing surface agree with theoretical results provided in the literature.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0821106-154812 |
| Date | 21 August 2006 |
| Creators | Tseng, Kai-hsin |
| Contributors | Jiin-yuh Jang, none, Fei-bin Hsiao, Peng-sheng Wei |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0821106-154812 |
| Rights | not_available, Copyright information available at source archive |
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