PPPL-5389
Gyrokinetic continuum simulation of turbulence in a straight
open-field-line plasma
Authors: E. Shi, G. Hammett, T. Stoltzfus-Dueck, and
A. Hakim
Abstract: 3D2V continuum gyrokinetic simulations of
electrostatic plasma turbulence in a straight, open-field-line
geometry have been performed using a full-! discontinuous-Galerkin
approach implemented in the Gkeyll code. While various
simplifications have been used for now, such as long-wavelength
approximations in the gyrokinetic Poisson equation and the
Hamiltonian, these simulations include the basic elements of a
fusion-device scrapeoff layer: localised sources to model plasma
outflow from the core, cross-field turbulent transport, parallel
flow along magnetic field lines, and parallel losses at the limiter
or divertor with sheath model boundary conditions. The set of sheath
boundary conditions used in the model allows currents to flow
through the walls. In addition to details of the numerical approach,
results from numerical simulations of turbulence in the Large Plasma
Device (LAPD), a linear device featuring straight magnetic field
lines, are presented.
Submitted to: Journal of Plasma
Physics
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