The Transition to Collisionless Ion-temperature-gradient-driven Plasma Turbulence: A Dynamical Systems Approach

Kolesnikov, R.A. ; Krommes, J.A.

Princeton University. Plasma Physics Laboratory.

关键词: Excitation;    70 Plasma Physics And Fusion Technology;    Zonal Flows;    Turbulence Nonlinear Theories;    Degrees Of Freedom;   

DOI  :  10.2172/835931
RP-ID  :  PPPL-4014
RP-ID  :  AC02-76CH03073
RP-ID  :  835931

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来源: UNT Digital Library

【 摘 要 】

The transition to collisionless ion-temperature-gradient-driven plasma turbulence is considered by applying dynamical systems theory to a model with ten degrees of freedom. Study of a four-dimensional center manifold predicts a ''Dimits shift'' of the threshold for turbulence due to the excitation of zonal flows and establishes the exact value of that shift in terms of physical parameters. For insight into fundamental physical mechanisms, the method provides a viable alternative to large simulations.