Turbulent Equipartition and Homogenization of Plasma Angular Momentum

Journal Article · Fri Apr 04 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.135001· OSTI ID:21123813

Guercan, Oe D; Diamond, P H; Hahm, T S ^[1]

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1. Center for Astrophysics and Space Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0424 (United States)

A physical model of turbulent equipartition (TEP) of plasma angular momentum is developed. We show that using a simple, model insensitive ansatz of conservation of total angular momentum, a TEP pinch of angular momentum can be obtained. We note that this term corresponds to a part of the pinch velocity previously calculated using quasilinear gyrokinetic theory. We observe that the nondiffusive TEP flux is inward, and therefore may explain the peakedness of the rotation profiles observed in certain experiments. Similar expressions for linear toroidal momentum and flow are computed and it is noted that there is an additional effect due the radial profile of moment of inertia density.

• OSTI ID: 21123813
• Journal Information: Physical Review Letters, Vol. 100, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.100.135001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR MOMENTUM
MOMENT OF INERTIA
PLASMA
ROTATION
VELOCITY