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Electromagnetic full- $f$ gyrokinetics in the tokamak edge with discontinuous Galerkin methods.
- Source :
-
Journal of Plasma Physics . Feb2020, Vol. 86 Issue 1, p1-39. 39p. - Publication Year :
- 2020
-
Abstract
- We present an energy-conserving discontinuous Galerkin scheme for the full- $f$ electromagnetic gyrokinetic system in the long-wavelength limit. We use the symplectic formulation and solve directly for $\unicode[STIX]{x2202}A_{\Vert }/\unicode[STIX]{x2202}t$ , the inductive component of the parallel electric field, using a generalized Ohm's law derived directly from the gyrokinetic equation. Linear benchmarks are performed to verify the implementation and show that the scheme avoids the Ampère cancellation problem. We perform a nonlinear electromagnetic simulation in a helical open-field-line system as a rough model of the tokamak scrape-off layer using parameters from the National Spherical Torus Experiment (NSTX). This is the first published nonlinear electromagnetic gyrokinetic simulation on open field lines. Comparisons are made to a corresponding electrostatic simulation. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GALERKIN methods
*OHM'S law
*ELECTRIC fields
*TORUS
*ROUGH sets
*EDGES (Geometry)
Subjects
Details
- Language :
- English
- ISSN :
- 00223778
- Volume :
- 86
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Plasma Physics
- Publication Type :
- Academic Journal
- Accession number :
- 144806132
- Full Text :
- https://doi.org/10.1017/S0022377820000070