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Effects of Collisional Zonal Flow Damping on Turbulent Transport

Effects of Collisional Zonal Flow Damping on Turbulent Transport,10.1103/PhysRevLett.83.3645,Physical Review Letters,Z. Lin,T. S. Hahm,W. W. Lee,W. M.

Effects of Collisional Zonal Flow Damping on Turbulent Transport   (Citations: 26)
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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. {copyright} {ital 1999} {ital The American Physical Society}
Journal: Physical Review Letters - PHYS REV LETT , vol. 83, no. 18, pp. 3645-3648, 1999
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    • ...While collisions have been shown to be potentially important for ITG turbulence, especially in regimes where collisions damp otherwise undamped zonal flows which strongly limit the transport [15], the effect of collisions is much more modest in cases such as those presented here, where there is robust transport in the absence of...

    A. M. Dimitset al. Gyrokinetic simulations of ETG and ITG turbulence

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