Reversal of the Parallel Drift Frequency in Anomalous Transport of Impurity Ions
Résumé
We study the heavy ion transport with the gyrokinetic simulation and find that when the gradient of the turbulence intensity is enhanced along the magnetic field line, part of the particles in velocity space reverses the parallel drift frequency. As a result, the particle transport related to the parallel dynamics is strongly enhanced. The parallel drift frequency is derived and shows that the frequency reversal is due to the amplitude effect of the turbulence on the plasma parallel structure and occurs when the gradient of turbulence intensity becomes large along the magnetic field line.
Domaines
Physique [physics]| Origine | Fichiers produits par l'(les) auteur(s) |
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