Abstract
The coupling between dispersive magnetoacoustic waves and a radiative thermal mode in a high-β plasma has been considered within the framework of a two-fluid model. A new dispersion relation has been derived and analyzed numerically to show a new class of radiation loss associated instability of coupled magnetoacoustic and radiative thermal modes. The results can have relevance to wave and instability phenomena in tokamaks where the plasma-β is sufficiently high.
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