Experimental study of the ion critical-gradient length and stiffness level and the impact of rotation in the JET Tokamak

Mantica, P; Strintzi, D; Tala, T; Giroud, C; Johnson, T; Leggate, H; Lerche, E; Loarer, T; Peeters, AG; Salmi, A; Sharapov, S; Van Eester, D; De Vries, PC; Zabeo, L; Zastrow, K-D

dc.contributor.author	Mantica, P	en
dc.contributor.author	Strintzi, D	en
dc.contributor.author	Tala, T	en
dc.contributor.author	Giroud, C	en
dc.contributor.author	Johnson, T	en
dc.contributor.author	Leggate, H	en
dc.contributor.author	Lerche, E	en
dc.contributor.author	Loarer, T	en
dc.contributor.author	Peeters, AG	en
dc.contributor.author	Salmi, A	en
dc.contributor.author	Sharapov, S	en
dc.contributor.author	Van Eester, D	en
dc.contributor.author	De Vries, PC	en
dc.contributor.author	Zabeo, L	en
dc.contributor.author	Zastrow, K-D	en
dc.date.accessioned	2014-03-01T01:30:28Z
dc.date.available	2014-03-01T01:30:28Z
dc.date.issued	2009	en
dc.identifier.issn	0031-9007	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19595
dc.subject	Experimental Study	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	Critical values	en
dc.subject.other	Experimental studies	en
dc.subject.other	Gradient lengths	en
dc.subject.other	Gyrokinetic codes	en
dc.subject.other	Ion temperature gradient modes	en
dc.subject.other	Ion temperatures	en
dc.subject.other	JET tokamaks	en
dc.subject.other	Nonlinear predictions	en
dc.subject.other	Toroidal rotations	en
dc.subject.other	Approximation theory	en
dc.subject.other	Fusion reactors	en
dc.subject.other	Ions	en
dc.subject.other	Rotation	en
dc.subject.other	Tokamak devices	en
dc.subject.other	Stiffness	en
dc.title	Experimental study of the ion critical-gradient length and stiffness level and the impact of rotation in the JET Tokamak	en
heal.type	journalArticle	en
heal.identifier.primary	10.1103/PhysRevLett.102.175002	en
heal.identifier.secondary	http://dx.doi.org/10.1103/PhysRevLett.102.175002	en
heal.identifier.secondary	175002	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Experiments were carried out in the JET tokamak to determine the critical ion temperature inverse gradient length (R/LTi=R\|Ti\|/Ti) for the onset of ion temperature gradient modes and the stiffness of Ti profiles with respect to deviations from the critical value. Threshold and stiffness have been compared with linear and nonlinear predictions of the gyrokinetic code GS2. Plasmas with higher values of toroidal rotation show a significant increase in R/LTi, which is found to be mainly due to a decrease of the stiffness level. This finding has implications on the extrapolation to future machines of present day results on the role of rotation on confinement. © 2009 The American Physical Society.	en
heal.publisher	AMER PHYSICAL SOC	en
heal.journalName	Physical Review Letters	en
dc.identifier.doi	10.1103/PhysRevLett.102.175002	en
dc.identifier.isi	ISI:000265948300026	en
dc.identifier.volume	102	en
dc.identifier.issue	17	en