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Author(s):
K. Itoh, S.-I Itoh, M. Yagi and A. Fukuyama
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Title:
Subcritical Excitation of Plasma Turbulence
Date of publication:
Jan. 1996
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Key words:
subcritical turbulence, interchange mode, current diffusivity, renormalization, dressed test mode, critical pressure gradient
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Abstract:
Theory of current-diffusive interchange mode turbulence in plasmas is developed in the presence of collisional transport. Double-valued amplitude of stationary fluctuations is expressed in terms of the pressure gradient. The backward bifurcation is shown to appear near the linear stability boundary. The subcritical nature of the turbulence is explicitly illustrated. Critical pressure gradient at which the transition from collisional transport to the turbulent one is to occur is predicted. This provides a prototype of the transport theory for nonlinear-non-equilibrium systems.
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