Experimental evidence and theory for the interaction of superthermal electrons with the MHD modes during ECRH

Lazaros, A

dc.contributor.author	Lazaros, A	en
dc.date.accessioned	2014-03-01T01:16:34Z
dc.date.available	2014-03-01T01:16:34Z
dc.date.issued	2001	en
dc.identifier.issn	0920-3796	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14091
dc.subject	Rational surface	en
dc.subject	Superthermal electrons	en
dc.subject	Thermal electrons	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.other	Electron cyclotron resonance	en
dc.subject.other	Electron transitions	en
dc.subject.other	Magnetohydrodynamics	en
dc.subject.other	Superthermal electrons	en
dc.subject.other	Plasmas	en
dc.title	Experimental evidence and theory for the interaction of superthermal electrons with the MHD modes during ECRH	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0920-3796(00)00473-7	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0920-3796(00)00473-7	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	The interaction of Electron Cyclotron Resonant Heating (ECRH) with the m/n = 2/1 magnetohydrodynamic (MHD) mode, which was observed in toroidal plasmas, is attributed to the superthermal electrons which are produced on the EC resonance by the ECRH. Superthermal electrons diffusing across the q = 2 surface, exchange power with the m/n = 2/1 MHD mode which is either suppressed or enhanced. When the EC resonance is outside the rational surface the mode is always suppressed. When the EC resonance is inside the rational surface, modes with a large amplitude are enhanced while modes with a small amplitude are suppressed. It is also shown quantitatively that a superthermal electron population, three orders of magnitude below the thermal electron density, would be sufficient to suppress the mode and an experiment is proposed for the confirmation of the theory. (C) 2001 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Fusion Engineering and Design	en
dc.identifier.doi	10.1016/S0920-3796(00)00473-7	en
dc.identifier.isi	ISI:000166634600005	en
dc.identifier.volume	53	en
dc.identifier.issue	1-4	en
dc.identifier.spage	35	en
dc.identifier.epage	42	en