## Abstract

A strong 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 (ρ < 0.4) and it is about half of the neutral beam injection torque. The calculation shows that the plasma is mainly in the ν-√ν regime in the plasma core, but it is close to the transition between the 1/ν and ν-√ν regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/ν and ν-√ν regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/ν and ν-√ν regimes. The NTV torque in the ν-√ν 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.Original language | English |
---|---|

Article number | 105007 |

Number of pages | 19 |

Journal | Plasma Physics and Controlled Fusion |

Volume | 52 |

Issue number | 10 |

DOIs | |

Publication status | Published - 2010 |

MoE publication type | A1 Journal article-refereed |

## Fingerprint

Dive into the research topics of 'Toroidal rotation braking with*n*= 1 magnetic perturbation field on JET'. Together they form a unique fingerprint.