Abstract
A nonlinear nalysis of the current-convective instability is carried out on the basis of a classical, two-fluid model that includes the effects of parallel electron current and thermal conductivity, electron compressibility and thermal force. Restriction is made to time rates of change slow compared with the resistive diffusion rate across a perpendicular wavelength. Assuming the background gradient of electron temperature to be much greater than that of the density, a set of mode-coupling equations between electron temperature and electrostatic potential Fourier components is analysed numerically. The heat flux is computed explicitly. The influence of parallel current and electron conductivity on plasma edge transport due to thermal excitations is determined and discussed.
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