Turbulent transport of fast ions in the Large Plasma Device

Shu Zhou, W. W. Heidbrink, H. Boehmer, R. McWilliams, T. Carter, S. Vincena, S. K.P. Tripathi, P. Popovich, B. Friedman, F. Jenko

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Strong drift wave turbulence is observed in the Large Plasma Device [H. Gekelman, Rev. Sci. Instrum. 62, 2875 (1991)] on density gradients produced by a plate limiter. Energetic lithium ions orbit through the turbulent region. Scans with a collimated ion analyzer and with Langmuir probes give detailed profiles of the fast ion spatial distribution and the fluctuating fields. The fast ion transport decreases rapidly with increasing fast ion gyroradius. Unlike the diffusive transport caused by Coulomb collisions, in this case the turbulent transport is nondiffusive. Analysis and simulation suggest that such nondiffusive transport is due to the interaction of the fast ions with stationary two-dimensional electrostatic turbulence.

Original languageEnglish
Article number092103
JournalPhysics of Plasmas
Volume17
Issue number9
DOIs
StatePublished - Sep 2010
Externally publishedYes

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