Observations of Toroidal Coupling for Low-Alfvén Modes in the TCA Tokamak
- 15 April 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 54 (15), 1671-1674
- https://doi.org/10.1103/physrevlett.54.1671
Abstract
The antenna structure in the TCA tokamak is phased to excite preferentially Alfvén waves with known toroidal and poloidal wave numbers. Surprisingly, the loading spectrum includes both discrete and continuum modes with poloidal wave numbers incompatible with the antenna phasing. These additional modes, which are important for our heating experiments, can be attributed to linear mode coupling induced by the toroidicity of the plasma column, when we take into account ion-cyclotron effects.Keywords
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