Analysis of the linear and nonlinear gap mode dynamics using a hybrid code
In a toroidal system, the inclusion of resistivity, a finite Larmor radius and kinetic effects affect the TAE stability as well as giving rise to a new mode, the kinetic TAE (KTAE), with two branches. The first branch is weakly stabilised by resistivity, whilst the second one is strongly stable close to the lower bound. In order to retain these effects in a non-perturbative way, a hybrid MHD-particle simulation code has been developed, which integrates the coupled sets of reduced MHD equations for the fluctuating fields and gyrokinetic equations of motion for the energetic particles. The structure of the code is described and the results of the linear stability analysis are presented. The problem of non-linear saturation is discussed and the finite compressibility effects on the internal kink mode stability are analysed.
Bibliographic Reference: Paper presented: 15th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Seville (ES), September 26 - October 1, 1994
Availability: Available from (1) as Paper EN 38624 ORA
Record Number: 199411308 / Last updated on: 1994-12-06
Original language: en
Available languages: en