Intrinsic rotation driven by non-Maxwellian equilibria in tokamak plasmas

Abstract

The effect of small deviations from a Maxwellian equilibrium on turbulent momentum transport in tokamak plasmas is considered. These non-Maxwellian features, arising from diamagnetic effects, introduce a strong dependence of the radial flux of co-current toroidal angular momentum on collisionality: As the plasma goes from nearly collisionless to weakly collisional, the flux reverses direction from radially inward to outward. This indicates a collisionality-dependent transition from peaked to hollow rotation profiles, consistent with experimental observations of intrinsic rotation.

5 pages, 3 figures

References in corpus (4)

• Interplanetary and interstellar plasma turbulence
• Scaling of spontaneous rotation with temperature and plasma current in tokamaks
• Toroidal momentum transport in a tokamak caused by symmetry breaking parallel derivatives
• Intrinsic rotation with gyrokinetic models

Cited by in corpus (12)

• Experimental observations and modelling of intrinsic rotation reversals in tokamaks
• Global gyrokinetic simulations of intrinsic rotation in ASDEX Upgrade Ohmic L-mode plasmas
• Intrinsic rotation in tokamaks: theory
• Dependence of intrinsic rotation reversals on collisionality in MAST
• Overview of recent physics results from MAST
• Rotation and Neoclassical Ripple Transport in ITER
• Turbulent momentum pinch of diamagnetic flows in a tokamak
• Equivalence of two different approaches to global $\delta f$ gyrokinetic simulations
• High-m Kink/Tearing Modes in Cylindrical Geometry
• A novel approach to radially global gyrokinetic simulation using the flux-tube code $\text{stella}$
• Intrinsic rotation driven by turbulent acceleration
• A current driven electromagnetic mode in sheared and toroidal configurations