Journal
PHYSICS OF PLASMAS
Volume 22, Issue 10, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4932070
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A gyrokinetic study based on numerical and analytical calculations is presented, which computes the dependence of the turbulent diffusion of highly charged impurities on the ratio of the electron to the ion heat flux of the plasma. Nonlinear simulations show that the size of the turbulent diffusion of heavy impurities can vary by one order of magnitude with fixed total heat flux and is an extremely sensitive function of the electron to ion heat flux ratio. Numerical linear calculations are found to reproduce the nonlinear results. Thereby, a quasi-linear analytical approach is used to explain the origin of this dependence. (C) 2015 AIP Publishing LLC.
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