Radial transport of energetic ions in the presence of trapped electron mode turbulence

Chowdhury, J.; Wang, W.; Ethier, S.; Manickam, J.; Ganesh, R.
November 2011
Physics of Plasmas;Nov2011, Vol. 18 Issue 11, p112510
Academic Journal
The nature of transport of hot ions is studied in the presence of microturbulence generated by the trapped electron mode in a Tokamak using massively parallel, first principle based global nonlinear gyrokinetic simulation, and with the help of a passive tracer method. Passing and trapped hot ions are observed to exhibit inverse and inverse square scaling with energy, while those with isotropic pitch distribution are found to exhibit inverse dependence on energy. For all types of hot ions, namely, isotropic, passing, and trapped, the radial transport appears to be subdiffusive for the parameters considered.


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