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Excitation of zonal flow by the modulational instability in electron temperature gradient driven turbulence

Published online by Cambridge University Press:  01 June 2008

Yu. A. ZALIZNYAK ,
A. I. YAKIMENKO  and
V. M. LASHKIN
Yu. A. ZALIZNYAK
Affiliation:
Institute for Nuclear Research, Nauki ave., 47, Kiev 03680, Ukraine
A. I. YAKIMENKO
Affiliation:
Institute for Nuclear Research, Nauki ave., 47, Kiev 03680, Ukraine Department of Physics, Taras Shevchenko National University, prospekt Glushkova 2, Kiev 03680, Ukraine ([email protected])
V. M. LASHKIN
Affiliation:
Institute for Nuclear Research, Nauki ave., 47, Kiev 03680, Ukraine
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Abstract

The generation of large-scale zonal flows by small-scale electrostatic drift waves in electron temperature gradient driven turbulence model is considered. The generation mechanism is based on the modulational instability of a finite amplitude monochromatic drift wave. The threshold and growth rate of the instability as well as the optimal spatial scale of zonal flow are obtained.

Type
Papers
Information
Journal of Plasma Physics , Volume 74 , Issue 3 , June 2008 , pp. 381 - 389
Copyright
Copyright © Cambridge University Press 2007

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