Acceleration
United States. Department of Energy. Office of Science.
Gyrokinetic Equations
Geometry
Princeton University. Plasma Physics Laboratory.
Turbulent Equipartition Theory of Toroidal Momentum Pinch
Modifications
Rewaldt, G.
Angular Momentum
Diamond, P. H.
ark: ark:/67531/metadc929711
Origin
The mode-independet part of magnetic curvature driven turbulent convective (TuroCo) pinch of the angular momentum density [Hahm et al., Phys. Plasmas 14,072302 (2007)] which was originally derived from the gyrokinetic equation, can be interpreted in terms of the turbulent equipartition (TEP) theory. It is shown that the previous results can be obtained from the local conservation of "magnetically weighted angular momentum density," nmi U|| R⁄B2, and its homogenization due to turbulent flows. It is also demonstrated that the magnetic curvature modification of the parallel acceleration in the nonlinear gyrokinetic equation in the laboratory frame, which was shown to be responsible for the TEP part of the TurCo pinch of angular momentum density in the previous work, is closely related to the Coriolis drift coupling to the perturbed electric field. In addition, the origin of the diffusive flux in the rotating frame is highlighted. Finally, it is illustratd that there should be a difference in scalings between the momentum pinch originated from inherently toroidal effects and that coming from other mechanisms which exist in a simpler geometry.
Turbulent Flow Gyrokinetic Equations
2008-01-31
Gurcan, O. D.
Physics
Electric Fields
Plasma
rep-no: PPPL-4285
osti: 960371
Transport Theory
70 Plasma Physics And Fusion Technology
grantno: DE-ACO2-76CHO3073
Rotating Plasmas
Forty-Ninth APS Division of Plasma Physics Meeting, 12–16 November 2007, Orlando, Florida USA
Hahm, T. S.