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Turbulent transport of fast ions in the Large Plasma Device
Authors
H Boehmer
T Carter
+8 more
B Friedman
WW Heidbrink
F Jenko
R McWilliams
P Popovich
SKP Tripathi
S Vincena
S Zhou
Publication date
1 September 2010
Publisher
eScholarship, University of California
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. © 2010 American Institute of Physics
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Last time updated on 25/12/2021