Fast growing resistive two fluid instabilities in hybrid-like tokamak configuration

An analytic derivation of the dispersion relation for resistive instabilities in a low-shear tokamak configuration is presented. The resistive infernal mode model (Charlton et al 1989 Phys. Fluids B 1 798) is generalized to include plasma diamagnetism, subsonic equilibrium toroidal flow shear and viscosity. An estimate of the transition point between the fast S−3/13 infernal-like (S is the Lundquist number) and the slow S−3/5 tearing-like scaling is given. A novel S−3/8 scaling is found close to the ideal ion-diamagnetic magnetohydrodynamic stability boundary. New moderately fast scalings in S are also found when sheared toroidal E × B flow and viscosity are considered. An analytic treatment of the m = n = 1 quasi-interchange mode in presence of density gradients with flat temperature profiles has been made.


Published in:
Plasma Physics and Controlled Fusion, 56, 7, 075025
Year:
2014
Publisher:
Bristol, Institute of Physics
ISSN:
0741-3335
Keywords:
Laboratories:
SPC
CRPP




 Record created 2014-08-18, last modified 2018-01-28


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)