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Transport and deceleration of fusion products in microturbulence

George Wilkie (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; I Abel ; M Landreman ; W Dorland
Physics of Plasmas (1070-664X). Vol. 23 (2016), 6, p. 060703.
[Artikel, refereegranskad vetenskaplig]

The velocity-space distribution of alpha particles born in fusion devices is subject to modification at moderate energies due to turbulent transport. Therefore, one must calculate the evolution of an equilibrium distribution whose functional form is not known a priori. Using a novel technique, applicable to any trace impurity, we have made this calculation for fully nonlinear gyrokinetic simulations not only possible, but particularly efficient. We demonstrate a microturbulence-induced departure from the local slowing-down distribution, an inversion of the energy distribution, and associated modifications to the alpha heating and pressure profiles in an ITER-like scenario.

Article Number: 060703

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Denna post skapades 2016-05-25. Senast ändrad 2017-01-09.
CPL Pubid: 236899


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