Journal
PHYSICS OF PLASMAS
Volume 17, Issue 9, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3486532
Keywords
Langmuir probes; plasma devices; plasma drift waves; plasma electrostatic waves; plasma fluctuations; plasma interactions; plasma transport processes; plasma turbulence
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Funding
- DOE [DE-FG02-03ER54720]
- U.S. Department of Energy (DOE) [DE-FG02-03ER54720] Funding Source: U.S. Department of Energy (DOE)
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Strong drift wave turbulence is observed in the Large Plasma Device [H. Gekelman et al., 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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3486532]
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