Combined kinetic and transport modelling of radiofrequency current drive
A numerical model for predictive simulations of radiofrequency current drive in magnetically confined plasmas is developed. It includes the minimum requirements for a self-consistent description of such regimes, ie. a 3-D kinetic equation for the electron distribution function, 1-D heat and current transport equations, and resonant coupling between velocity space and configuration space dynamics, through suitable wave propagation equations. The model finds its full application in predictive studies of complex current profile control scenarios in tokamaks, aiming at the establishment of internal transport barriers by the simultaneous use of various radiofrequency current drive methods. The basic properties of this non-linear numerical system are investigated and illustrated by simulations applied to reversed magnetic shear regimes obtained by Lower Hybrid and Electron Cyclotron current drive for parameters typical of the Tore Supra tokamak.
Bibliographic Reference: Report: EUR-CEA-FC-1697 EN (2000) 43 pp.
Availability: Available from Association CEA-EURATOM sur la Fusion ContrlÚe, CEA Cadarache, Saint-Paul-Lez-Durance (FR)
Record Number: 200012302 / Last updated on: 2000-08-10
Original language: en
Available languages: en