STUDY OF THE EXPANSION OF A PLASMA GENERATED BY ELECTRON-BEAM EVAPORATION

Citation
E. Besuelle et Jp. Nicolai, STUDY OF THE EXPANSION OF A PLASMA GENERATED BY ELECTRON-BEAM EVAPORATION, Journal of applied physics, 84(8), 1998, pp. 4114-4121
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
0021-8979
Volume
84
Issue
8
Year of publication
1998
Pages
4114 - 4121
Database
ISI
SICI code
0021-8979(1998)84:8<4114:SOTEOA>2.0.ZU;2-L
Abstract
The stationary expansion of an ionized uranium vapor, created in an el ectron-beam evaporator, is studied in this article. Using an electrost atic probe, the electron temperature, the electron density, and the pl asma potential have been measured along the vertical axis in the evapo rator. The analysis, made by moving the probe along the vertical axis, first shows that the plasma is thermalized during its expansion in th e vacuum chamber and, second, that the plasma density decreases expone ntially. The plasma expansion is theoretically described using a fluid model which takes into account the charge exchange process. In solvin g the system, consisting of three equations (continuity, momentum cons ervation, and energy conservation!, good agreement with the experiment al data is obtained. (C) 1998 American Institute of Physics. [S0021-89 79(98)09020-3].