Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Linear and nonlinear resistive magnetohydrodynamic stability of tokamak discharges with negative central shear
Autore:
Leboeuf, JN; Lynch, VE; Carreras, BA;
Indirizzi:
Univ Calif Los Angeles, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA Oak Ridge Natl Lab Oak Ridge TN USA 37831 tl Lab, Oak Ridge, TN 37831 USA
Titolo Testata:
PHYSICS OF PLASMAS
fascicolo: 7, volume: 8, anno: 2001,
pagine: 3358 - 3366
SICI:
1070-664X(200107)8:7<3358:LANRMS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
REVERSED MAGNETIC SHEAR; DIII-D TOKAMAK; TOROIDAL GEOMETRY; CONFINEMENT; MODES; PERFORMANCE; TURBULENCE; PROFILES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Leboeuf, JN Univ Calif Los Angeles, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 CA 90095 USA
Citazione:
J.N. Leboeuf et al., "Linear and nonlinear resistive magnetohydrodynamic stability of tokamak discharges with negative central shear", PHYS PLASMA, 8(7), 2001, pp. 3358-3366

Abstract

Linear and nonlinear magnetohydrodynamic (MHD) calculations have been performed to study the stability of tokamak discharges with reversed or negative central magnetic shear using the finite aspect ratio (FAR) suite of MHD codes [Charlton , J. Comput. Phys. 86, 270 (1990)]. The linear calculations confirm anew that radially localized resistive interchange modes can be unstable in the reversed or negative central magnetic shear region. The calculations further show that these resistive interchange modes are more unstable for toroidal mode numbers n higher than n=1. The nonlinear calculations do however demonstrate that toroidal mode number n=1, enhanced by the nonlinear couplings of the linearly more unstable higher n toroidal harmonics, dominates the nonlinearly saturated steady state. While the resistive interchange modes may account for the precursors detected experimentally, the saturated levels of magnetic fluctuations obtained in the nonlinear calculations do not appear large enough to cause the experimentally observed global collapse of such discharges. (C) 2001 American Institute of Physics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 06:00:01