Electrontemperaturegradientdriven drift waves and anomalous electron energy transport
Abstract
By means of a kinetic description for ions and Braginskii's fluid model for electrons, we derive three coupled nonlinear equations governing the dynamics of lowfrequency shortwavelength electrostatic waves in the presence of equilibrium density, temperature and magneticfield gradients in a twocomponent magnetized plasma. In the linear limit we present a dispersion relation that admits new instabilities of drift waves. An estimate of the anomalous electron energy transport due to nonthermal drift waves is obtained by making use of the saturated wave potential, which is deduced from the mixinglength hypothesis. We also present stationary solutions of the nonlinear equations governing the interaction of linearly unstable drift waves. The relevance of our investigation to wave phenomena in space and laboratory plasmas is pointed out.
 Publication:

Journal of Plasma Physics
 Pub Date:
 December 1990
 DOI:
 10.1017/S0022377800015270
 Bibcode:
 1990JPlPh..44..393S
 Keywords:

 Electron Energy;
 Electrostatic Waves;
 Energy Transfer;
 Magnetohydrodynamic Waves;
 Plasma Drift;
 Equilibrium Methods;
 Nonlinear Equations;
 PlasmaElectromagnetic Interaction;
 Space Plasmas;
 Temperature Gradients;
 Transport Properties;
 Plasma Physics