The influence of the self-consistent mode structure on the coriolis pinch effect

Peeters, AG; Angioni, C; Camenen, Y; Casson, FJ; Hornsby, WA; Snodin, AP; Strintzi, D

dc.contributor.author	Peeters, AG	en
dc.contributor.author	Angioni, C	en
dc.contributor.author	Camenen, Y	en
dc.contributor.author	Casson, FJ	en
dc.contributor.author	Hornsby, WA	en
dc.contributor.author	Snodin, AP	en
dc.contributor.author	Strintzi, D	en
dc.date.accessioned	2014-03-01T01:32:10Z
dc.date.available	2014-03-01T01:32:10Z
dc.date.issued	2009	en
dc.identifier.issn	1070-664X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20053
dc.subject	drift instability	en
dc.subject	perturbation theory	en
dc.subject	pinch effect	en
dc.subject	plasma simulation	en
dc.subject	plasma toroidal confinement	en
dc.subject	Tokamak devices	en
dc.subject.classification	Physics, Fluids & Plasmas	en
dc.subject.other	Collisionality	en
dc.subject.other	Coriolis	en
dc.subject.other	Drift effects	en
dc.subject.other	Eigen modes	en
dc.subject.other	Electron trapping	en
dc.subject.other	Electrostatic potentials	en
dc.subject.other	Gyrokinetic simulations	en
dc.subject.other	Inverse aspect ratio	en
dc.subject.other	Kinetic electrons	en
dc.subject.other	Low-field sides	en
dc.subject.other	Mode structure	en
dc.subject.other	Pinch velocity	en
dc.subject.other	Toroidal geometry	en
dc.subject.other	Trapped electrons	en
dc.subject.other	Trapped particle	en
dc.subject.other	Wave vector	en
dc.subject.other	Aspect ratio	en
dc.subject.other	Electron traps	en
dc.subject.other	Magnetohydrodynamics	en
dc.subject.other	Pinch effect	en
dc.subject.other	Plasma theory	en
dc.subject.other	Tokamak devices	en
dc.subject.other	Velocity	en
dc.subject.other	Electrons	en
dc.title	The influence of the self-consistent mode structure on the coriolis pinch effect	en
heal.type	journalArticle	en
heal.identifier.primary	10.1063/1.3124133	en
heal.identifier.secondary	http://dx.doi.org/10.1063/1.3124133	en
heal.identifier.secondary	062311	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	This paper discusses the effect of the mode structure on the Coriolis pinch effect [A. G. Peeters, C. Angioni, and D. Strintzi, Phys. Rev. Lett. 98, 265003 (2007)]. It is shown that the Coriolis drift effect can be compensated for by a finite parallel wave vector, resulting in a reduced momentum pinch velocity. Gyrokinetic simulations in full toroidal geometry reveal that parallel dynamics effectively removes the Coriolis pinch for the case of adiabatic electrons, while the compensation due to the parallel dynamics is incomplete for the case of kinetic electrons, resulting in a finite pinch velocity. The finite flux in the case of kinetic electrons is interpreted to be related to the electron trapping, which prevents a strong asymmetry in the electrostatic potential with respect to the low field side position. The physics picture developed here leads to the discovery and explanation of two unexpected effects: First the pinch velocity scales with the trapped particle fraction (root of the inverse aspect ratio), and second there is no strong collisionality dependence. The latter is related to the role of the trapped electrons, which retain some symmetry in the eigenmode, but play no role in the perturbed parallel velocity. © 2009 American Institute of Physics.	en
heal.publisher	AMER INST PHYSICS	en
heal.journalName	Physics of Plasmas	en
dc.identifier.doi	10.1063/1.3124133	en
dc.identifier.isi	ISI:000267599400024	en
dc.identifier.volume	16	en
dc.identifier.issue	6	en