Journal
PHYSICS OF PLASMAS
Volume 23, Issue 2, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4941973
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Funding
- U.S. Department of Energy Office of Science, Office of Fusion Energy Sciences [DE-SC0010471]
- U.S. Department of Energy (DOE) [DE-SC0010471] Funding Source: U.S. Department of Energy (DOE)
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Vortex motion of the dust in a dusty plasma is shown to result because non-parallelism of the ion density gradient and the gradient of the magnitude of the ion ambipolar velocity cause the ion drag force on dust grains to be non-conservative. Dust grain poloidal vortices consistent with the model predictions are experimentally observed, and the vortices change character with imposed changes in the ion temperature profile as predicted. For a certain ion temperature profile, two adjacent corotating poloidal vortices have a well-defined X-point analogous to the X-point in magnetic reconnection. (C) 2016 AIP Publishing LLC.
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