Abstract
dc:description.abstractA resonant ion heating system has been developed for heating ions and controlling the ion temperature anisotropy in a helicon plasma source. The system uses two rectangular coils placed on either side of the cylindrical pyrex vacuum chamber to create a time dependent magnetic field transverse to the steady state axial field. A 1 kW, 25--125 kHz RF generator powers the coils. The parallel and perpendicular ion temperatures in argon plasmas are measured with a laser induced fluorescence diagnostic tuned to a metastable argon ion transition. Ion heating of over 800% has been measured for the perpendicular ion temperatures with an increase of 70% in the parallel direction. This temperature increase occurs for a specific ratio of heating frequency to ion cyclotron frequency. Evidence suggesting that ion Bernstein waves are responsible for the ion heating is presented.
Degree
thesis:*- Name thesis:degree_name
- MS
- Level thesis:degree_level
- Thesis
- Discipline thesis:degree_discipline
- Physics and Astronomy
- Year dc:date.available
- 1998
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Kline, John L.
- Contributors dc:contributor
-
- Earl E. Scime.
Subjects
dc:subject × 1Identifiers
dc:identifier.*- Identifier
- https://researchrepository.wvu.edu/etd/920
- OAI identifier oai:identifier
- oai:researchrepository.wvu.edu:etd-1923