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In conventional drift wave theory the density gradient k(n) determines the linear phase velocity, and the (electron) temperature gradient k(T) gives rise to a nonlinear term which leads to the existence of soliton-type solutions and solitary waves. It has recently been claimed that it is not k(T) but essentially the derivative of the density gradient, dk(n)/dx, that is relevant. This claim is refuted by means of an expansion scheme involving the drift wave potential.

Additional information

Authors: SALAT A, Max-Planck-Institut fuer Plasmaphysik, Garching bei Muenchen (DE)
Bibliographic Reference: Report: IPP 6/287 EN (1990) 16 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei Muenchen (DE)
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