Avoidance of neoclassical tearing mode locking and disruption by feedback-induced accelerating electro-magnetic torque

M. Okabayashi, E. J. Strait, A. M. Garofalo, J. M. Hanson, Y. In, R. J. La Haye, D. Shiraki, F. Volpe

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

We have explored the avoidance of NTM locking and its associated disruption by applying non-axisymmetric magnetic fields regulated by a feedback system. The process involves the introduction of the EM JxB torque. The steady-state toroidal phase of the mode, δBp, is found to be nearly in-phase with the feedback-supplied Br.ext, producing near maximum torque for the given mode amplitude and the coil current. This phase relation makes the locking avoidance more resilient to disruptions. The simple model prediction is consistent with the experiments.

Original languageEnglish
Title of host publication40th EPS Conference on Plasma Physics, EPS 2013
PublisherEuropean Physical Society (EPS)
Pages721-724
Number of pages4
ISBN (Print)9781632663108
StatePublished - 2013
Externally publishedYes
Event40th EPS Conference on Plasma Physics, EPS 2013 - Espoo, Finland
Duration: Jul 1 2013Jul 5 2013

Publication series

Name40th EPS Conference on Plasma Physics, EPS 2013
Volume1

Conference

Conference40th EPS Conference on Plasma Physics, EPS 2013
Country/TerritoryFinland
CityEspoo
Period07/1/1307/5/13

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