Dependence of Perpendicular Viscosity on Magnetic Fluctuations in a Stochastic Topology.
Phys Rev Lett
; 120(22): 225002, 2018 Jun 01.
Article
in En
| MEDLINE
| ID: mdl-29906181
ABSTRACT
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, â¼ tenfold variation in the fluctuation amplitude, the viscosity increases â¼100-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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Type of study:
Prognostic_studies
Language:
En
Journal:
Phys Rev Lett
Year:
2018
Document type:
Article
Affiliation country:
Suecia