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APS » Journals » Phys. Rev. Lett. » Volume 83 » Issue 18
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Phys. Rev. Lett. 83, 3645–3648 (1999)

Effects of Collisional Zonal Flow Damping on Turbulent Transport

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Z. Lin1, T. S. Hahm1, W. W. Lee1, W. M. Tang1, and P. H. Diamond2
1Princeton Plasma Physics Laboratory, Princeton University, P.O. Box 451, Princeton, New Jersey 08543
2Department of Physics, University of California at San Diego, La Jolla, California 92093

Received 20 May 1999; published in the issue dated 1 November 1999

Results from 3D global gyrokinetic particle simulations of ion-temperature-gradient driven microturbulence in a toroidal plasma show that the ion thermal transport level in the interior region exhibits significant dependence on the ion-ion collision frequency even in regimes where the instabilities are collisionless. This is identified as arising from the Coulomb collisional damping of turbulence-generated zonal flows.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.3645
DOI:
10.1103/PhysRevLett.83.3645
PACS:
52.25.Fi, 52.35.Ra, 52.65.Tt
 
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