Fluctuations in the Ion-Cyclotron-Frequency Range: Possible Measurement ofTeTiin Tokamaks
- 6 October 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 45 (14), 1185-1188
- https://doi.org/10.1103/physrevlett.45.1185
Abstract
The thermal density fluctuations in a typical tokamak plasma, for a wave vector perpendicular to the magnetic field and for a wavelength of the order of the ion gyroradius, are shown to be maximum at the frequency of the zero-group-velocity ion cyclotron waves. This frequency is sensitive to the ion- to electron-temperature ratio and the spectrum remains peaked despite a poor scattering-vector definition and destabilizing effects such as presence of a current. Possible applications to tokamak diagnosis are emphasized.Keywords
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