April 4-6

Abstract Details

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Author: Tony M. Qian
Requested Type: Consider for Invited
Submitted: 2022-03-04 13:04:24

Co-authors: W. Dorland, S. Fischer, N. Mandell, M. Zarnstorff

Contact Info:
Princeton University
4 Ivy Ln
Princeton, NJ   08544

Abstract Text:
[Plasma Properties, Equilibrium, Stability, and Transport]

Trinity is a time-dependent transport solver that leverages an implicit time-stepping algorithm to take large time steps using turbulent fluxes computed by any radially local gyrokinetic code. Results presented here use GX [1], a pseudo spectral flux tube code which obtains non-linear ITG fluxes in 10s-5m, running on a single GPU. We present benchmarks against earlier calculations by Barnes [2], as well as new calculations in geometries which resemble ITER and SPARC. Sources and edge boundary conditions are provided externally. Our first attempts at profile prediction in non-axisymmetric stellarators will also be presented.

[1] N.R. Mandell, W. Dorland, and M. Landreman, Laguerre–Hermite pseudo-spectral velocity formulation of gyrokinetics, Journal of Plasma Physics 84, 905840108 (2018).

[2] M. Barnes, I. G. Abel, W. Dorland, T. Goerler, G. W. Hammett, and F. Jenko, Direct multiscale coupling of a transport code to gyrokinetic turbulence codes, Physics of Plasmas 17, 056109 (2010).