Session K1: Poster Session: Magnetically Confined Plasma I
2:00 PM–2:00 PM, Sunday, April 23, 2006
Hyatt Regency Dallas Room: Marsalis Hall B, 2:00pm - 5:00pm
Abstract ID: BAPS.2006.APR.K1.50
Abstract: K1.00050 : Tempest Neoclassical Simulation of Fusion Edge Plasmas
Preview Abstract
MathJax On | Off 
Abstract 
Authors:
X.Q. Xu
Z. Xiong
B.I. Cohen
R.H. Cohen
M. Dorr
J. Hittinger
G.D. Kerbel
W.M. Nevins
T.D. Rognlien
(LLNL)
We are developing a continuum gyrokinetic full-F code, TEMPEST, to simulate edge plasmas. The geometry is that of a fully diverted tokamak and so includes boundary conditions for both closed magnetic flux surfaces and open field lines. The code, presently 4-dimensional (2D2V), includes kinetic ions and electrons, a gyrokinetic Poisson solver for electric field, and the nonlinear Fokker-Planck collision operator. Here we present the simulation results of neoclassical transport with Boltzmann electrons. In a large aspect ratio circular geometry, excellent agreement is found for neoclassical equilibrium with parallel flows in the banana regime without a temperature gradient. In divertor geometry, it is found that the endloss of particles and energy induces pedestal-like density and temperature profiles inside the magnetic separatrix and parallel flow stronger than the neoclassical predictions in the SOL. The impact of the X-point divertor geometry on the self-consistent electric field and geo-acoustic oscillations will be reported. We will also discuss the status of extending TEMPEST into a 5-D code.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2006.APR.K1.50