Discrete spectrum of Alfv{acute e}n ion{endash}ion hybrid waves
- Department of Nuclear Engineering and Engineering Physics, University of Wisconsin, Madison, Wisconsin 53706-1687 (United States)
In the Phaedrus-T tokamak [R. Majeski {ital et} {ital al}., Phys Fluids B {bold 5}, 2506 (1993)], Alfv{acute e}n waves are indirectly driven by a fast wave antenna array. Small fractions of minority ions can couple Alfv{acute e}n and ion{endash}ion hybrid waves and have a large effect on the wave numbers accessible for a given launched frequency. A discrete spectrum and toroidal damping for these modes has been identified by measuring dispersion properties at the edge. Landau damping is predicted to be large and spatially localized and to be responsible for the experimentally observed electron heating (T. Intrator {ital et} {ital al}., {open_quote}{open_quote}Alfv{acute e}n ion{endash}ion hybrid wave heating in the Phaedrus-T tokamak,{close_quote}{close_quote} to appear in Phys. Plasmas) and current drive near the core of the tokamak plasmas. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- University of Wisconsin
- DOE Contract Number:
- FG02-88ER53264
- OSTI ID:
- 279488
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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