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Dependence of Perpendicular Viscosity on Magnetic Fluctuations in a Stochastic Topology
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- Fridström, Richard (author)
- KTH,Fusionsplasmafysik
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- Chapman, B. E. (author)
- Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA.
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- Almagri, A. F. (author)
- Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA.
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- (creator_code:org_t)
- American Physical Society, 2018
- 2018
- English.
- In: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 120:22
- Journal article (peer-reviewed)
Abstract
Subject headings
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- In a magnetically confined plasma with a stochastic magnetic field, the dependence of the perpendicular viscosity on the magnetic fluctuation amplitude is measured for the first time. With a controlled, similar to tenfold variation in the fluctuation amplitude, the viscosity increases similar to 100-fold, exhibiting the same fluctuation-amplitude-squared dependence as the predicted rate of stochastic field line diffusion. The absolute value of the viscosity is well predicted by a model based on momentum transport in a stochastic field, the first in-depth test of this model.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
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- ref (subject category)
- art (subject category)
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