Intrinsic rotation drive by collisionless trapped electron mode turbulence
نویسندگان
چکیده
منابع مشابه
Trapped electron mode turbulence driven intrinsic rotation in Tokamak plasmas.
Progress from global gyrokinetic simulations in understanding the origin of intrinsic rotation in toroidal plasmas is reported. The turbulence-driven intrinsic torque associated with nonlinear residual stress generation due to zonal flow shear induced asymmetry in the parallel wave number spectrum is shown to scale close to linearly with plasma gradients and the inverse of the plasma current, q...
متن کاملZonal 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...
متن کاملNonlinear stability and instability in collisionless trapped electron mode turbulence
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 ...
متن کاملConvective motion in collisionless trapped electron mode turbulence
Global gyrokinetic particle simulation of collisionless trapped electron mode turbulence in toroidal plasmas finds both diffusive and convective electron motion using a Lagrangian analysis. The convective motion is identified using simulation and analytic theory to arise from the conservation of the second invariant when resonant trapped electrons lose kinetic energy to the drift wave. A resona...
متن کاملNonlinear saturation of collisionless trapped electron mode turbulence: zonal flows and zonal density
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...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2016
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.4947206