{"id":{"repo_id":"wvu","oai_identifier":"oai:researchrepository.wvu.edu:etd-1923"},"canonical_url":"https://search.dev.ndltd.org/etd/wvu/oai:researchrepository.wvu.edu:etd-1923","repository":{"repo_id":"wvu","name":"West Virginia University","base_url":"https://researchrepository.wvu.edu/do/oai/"},"display":{"title":"Resonant ion heating in a helicon plasma","abstract":"A 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.","abstract_html":"A 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.","abstract_has_math":false,"creators":["Kline, John L."],"institution":null,"degree_name":"MS","degree_level":"Thesis","degree_discipline":"Physics and Astronomy","degree_department":null,"school":null,"contributors":["Earl E. Scime."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1998,"date_issued":"1998-12-01T08:00:00Z","date_published":"1998-12-01T08:00:00Z","updated_at":"2026-07-24T06:15:01Z","subjects":["Plasma physics"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://researchrepository.wvu.edu/etd/920"],"render_values":[{"text":"https://researchrepository.wvu.edu/etd/920","href":"https://researchrepository.wvu.edu/etd/920","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.33915/etd.920","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Earl E. 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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."]},{"key":"dc:title","label":"Title","values":["Resonant ion heating in a helicon plasma"]}]}],"canonical_facts":{"dc:contributor":["Earl E. Scime."],"dc:creator":["Kline, John L."],"dc:date.available":["2019-01-17T08:00:00Z"],"dc:description.abstract":["A 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."],"dc:identifier":["https://doi.org/10.33915/etd.920","https://researchrepository.wvu.edu/etd/920"],"dc:subject":["Plasma physics"],"dc:title":["Resonant ion heating in a helicon plasma"],"thesis:degree_discipline":["Physics and Astronomy"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["MS"]},"updated_at":"2026-07-24T06:15:01Z"}