Gyrokinetic Simulation of Turbulent Transport with Split-Weight Drift-Kinetic Electrons
Abstract
Results are reported on the development and application of recently introduced algorithms for the particle simulation of electromagnetic drift-wave turbulence with drift-kinetic electrons and gyrokinetic ions. The algorithms employ delta-f (partially linearized) kinetic descriptions of both electrons and ions. The electron response is modeled with the split-weight algorithm (analytically separated Boltzmann response) and with either parallel canonical momentum or parallel electron velocity with a semi-implicit modification. Self-consistent electromagnetic fields are obtained by solving the quasi-neutrality condition for the electrostatic potential and the parallel component of Ampere's law for the parallel vector potential. Test problems for the two algorithms are the linear dispersion of the kinetic shear-Alfven wave and the ion-temperature-gradient instability at finite plasma pressure. Of particular interest is the emergence of a numerical stiffness problem at high plasma pressure.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2000
- Bibcode:
- 2000APS..DPPJP1006C