Radiative Magnetoacoustic Condensation Instability in High-Beta Plasmas

Abstract

The coupling between dispersive magnetoacoustic waves and a radiative thermal mode in a high-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 plasmais sufficiently high.