Zonal flow generation in collisionless trapped electron mode turbulence
نویسندگان
چکیده
منابع مشابه
Zonal flow generation in collisionless trapped electron mode turbulence
In the present work the generation of zonal flows in collisionless trapped electron mode (TEM) turbulence is studied analytically. A reduced model for TEM turbulence is utilized based on an advanced fluid model for reactive drift waves. An analytical expression for the zonal flow growth rate is derived and compared with the linear TEM growth, and its scaling with plasma parameters is examined f...
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Gyrokinetic δf particle simulation is used to investigate the nonlinear saturation mechanisms in collisionless trapped electron mode (CTEM) turbulence. It is found that the importance of zonal flow is parameter sensitive and is well characterized by the shearing rate formula. The effect of zonal flow is empirically found to be sensitive to temperature ratio, magnetic shear and electron temperat...
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A two-field model for collisionless trapped electron mode turbulence has both finite amplitude-induced stability and instability, depending on wave number. Effects usually identified with nonlinear plasma instability ~self-trapping, kinetics, 3D mode structure, magnetic shear! are absent. Nonlinear stability and instability reside in E3B advection of density. It drives modes of a purely damped ...
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ژورنال
عنوان ژورنال: Plasma Physics and Controlled Fusion
سال: 2006
ISSN: 0741-3335,1361-6587
DOI: 10.1088/0741-3335/48/5/011