Abstract
Astrong toroidal rotation braking has been observed in plasmas with application of an n = 1 magnetic perturbation field on the JET tokamak. Calculation results from the momentum transport analysis show that the torque induced by the n = 1 perturbation field has a global profile. The maximal value of this torque is at the plasma core region (? < 0.4) and it is about half of the neutral beam injection torque. The calculation shows that the plasma is mainly in the ? -√ ? regime in the plasma core, but it is close to the transition between the 1/? and ? -√ ? regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/? and ? -√ ? regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/? and ? -√ ? regimes. The NTV torque in the ? -√ ? regimes is enhanced using the Lagrangian variation of the magnetic field strength. However, it is still smaller than the observed torque by one order of magnitude.
Originalsprache | Englisch |
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Aufsatznummer | 105007 |
Fachzeitschrift | Plasma Physics and Controlled Fusion |
Jahrgang | 52 |
Ausgabenummer | 10 |
DOIs | |
Publikationsstatus | Veröffentlicht - Okt. 2010 |