MHD activity triggered by monster sawtooth crashes on Tore Supra

Maget, P; Artaud, J-F; Eriksson, L-G; Huysmans, G; Lazaros, A; Moreau, P; Ottaviani, M; Segui, J-L; Zwingmann, W

dc.contributor.author	Maget, P	en
dc.contributor.author	Artaud, J-F	en
dc.contributor.author	Eriksson, L-G	en
dc.contributor.author	Huysmans, G	en
dc.contributor.author	Lazaros, A	en
dc.contributor.author	Moreau, P	en
dc.contributor.author	Ottaviani, M	en
dc.contributor.author	Segui, J-L	en
dc.contributor.author	Zwingmann, W	en
dc.date.accessioned	2014-03-01T01:22:45Z
dc.date.available	2014-03-01T01:22:45Z
dc.date.issued	2005	en
dc.identifier.issn	0741-3335	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16641
dc.subject.classification	Physics, Fluids & Plasmas	en
dc.subject.classification	Physics, Nuclear	en
dc.subject.other	Damping	en
dc.subject.other	Electron cyclotron resonance	en
dc.subject.other	Harmonic analysis	en
dc.subject.other	Linear systems	en
dc.subject.other	Magnetic field effects	en
dc.subject.other	Mathematical models	en
dc.subject.other	Perturbation techniques	en
dc.subject.other	Plasmas	en
dc.subject.other	Tokamak devices	en
dc.subject.other	Linear destabilization	en
dc.subject.other	Linear instability	en
dc.subject.other	Magnetic perturbations	en
dc.subject.other	Nonclassical tearing mode (NTM)	en
dc.subject.other	Magnetohydrodynamics	en
dc.title	MHD activity triggered by monster sawtooth crashes on Tore Supra	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0741-3335/47/2/010	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0741-3335/47/2/010	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	The crash of monster sawteeth in Tore Supra ion cyclotron resonance heated plasmas is observed to trigger long-lived magneto hydrodynamic (MHD) activity, dominated by a (m = 3, n = 2) magnetic perturbation at the edge. This phenomenon is reminiscent of the triggering of neoclassical tearing modes, although in Tore Supra the MHD activity decays and eventually vanishes. It can be explained by the linear destabilization of the (3,2) mode as the current sheet developed in the non-linear stage of the internal kink relaxation gets closer to q = 3/2. However, the lifetime of the (3,2) island is longer than the period of linear instability. We find that the neoclassical drive is essential for explaining the observed lifetime and width of the island, although the overall dynamics is controlled by the relaxation of the current profile on a resistive time scale.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	Plasma Physics and Controlled Fusion	en
dc.identifier.doi	10.1088/0741-3335/47/2/010	en
dc.identifier.isi	ISI:000227287600011	en
dc.identifier.volume	47	en
dc.identifier.issue	2	en
dc.identifier.spage	357	en
dc.identifier.epage	377	en