Transport of parallel momentum induced by current-symmetry breaking in toroidal plasmas.
Phys Rev Lett
; 102(12): 125001, 2009 Mar 27.
Article
en En
| MEDLINE
| ID: mdl-19392289
ABSTRACT
The symmetry of a physical system strongly impacts on its properties. In toroidal plasmas, the symmetry along a magnetic field line usually constrains the radial flux of parallel momentum to zero in the absence of background flows. By breaking the up-down symmetry of the toroidal currents, this constraint can be relaxed. The parallel asymmetry in the magnetic configuration then leads to an incomplete cancellation of the turbulent momentum flux across a flux surface. The magnitude of the subsequent toroidal rotation increases with the up-down asymmetry and its sign depends on the direction of the toroidal magnetic field and plasma current. Such a mechanism offers new insights in the interpretation and control of the intrinsic toroidal rotation in present day experiments.
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Bases de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2009
Tipo del documento:
Article
País de afiliación:
Reino Unido