Linear Delta-f Simulations of Nonlocal Electron Heat Transport
Authors: S. Brunner, E. Valeo, and J.A. Krommes
Date of PPPL Report: January 2000
Published in: Phys. Plasmas 7 (July 2000) 2810-2823.
Nonlocal electron heat transport calculations are carried out by making use of some of the techniques developed previously for extending the delta f method to transport time scale simulations. By considering the relaxation of small amplitude temperature perturbations of an homogeneous Maxwellian background, only the linearized Fokker-Planck equation has to be solved, and direct comparisons can be made with the equivalent, nonlocal hydrodynamic approach. A quasineutrality-conserving algorithm is derived for computing the self-consistent electric fields driving the return currents. In the low-collisionality regime, results illustrate the importance of taking account of nonlocality in both space and time.