A conservative scheme for electromagnetic simulation of magnetized plasmas with kinetic electrons
Abstract
A conservative scheme has been formulated and confirmed for gyrokinetic particle simulations of electromagnetic waves and instabilities in magnetized plasmas. An electron continuity equation derived from the drift kinetic equation is used to time advance the electron density perturbation by using the perturbed mechanical flow calculated from the parallel vector potential, and the parallel vector potential is solved by using the perturbed canonical flow from the perturbed distribution function. In gyrokinetic particle simulations using this new scheme, the shear Alfvén wave dispersion relation in the shearless slab and continuum damping in the sheared cylinder have been recovered. The new scheme overcomes the stringent requirement in the conventional perturbative simulation method that perpendicular grid size needs to be as small as electron collisionless skin depth even for the long wavelength Alfvén waves. The new scheme also circumvents the problem in the typical approach that an unphysically large parallel electric field arises due to the inconsistency between electrostatic potential calculated from the perturbed density and vector potential calculated from the perturbed canonical flow. Lastly, the gyrokinetic particle simulations of the Alfvén waves in sheared cylinder have superior numerical properties compared with the fluid simulations, which suffer from numerical difficulties associated with singularmore »
- Authors:
-
[2];
[3]
- Univ. of California, Irvine, CA (United States); Peking Univ., Beijing (China)
- Univ. of California, Irvine, CA (United States)
- Peking Univ., Beijing (China); Max Planck Inst. für Plasmaphysik, Garching (Germany)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); China Scholarship Council
- OSTI Identifier:
- 1543850
- Alternate Identifier(s):
- OSTI ID: 1422452
- Grant/Contract Number:
- AC02-05CH11231; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 2; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Bao, J., Lin, Z., and Lu, Z. X. A conservative scheme for electromagnetic simulation of magnetized plasmas with kinetic electrons. United States: N. p., 2018.
Web. doi:10.1063/1.5016432.
Bao, J., Lin, Z., & Lu, Z. X. A conservative scheme for electromagnetic simulation of magnetized plasmas with kinetic electrons. United States. https://doi.org/10.1063/1.5016432
Bao, J., Lin, Z., and Lu, Z. X. Fri .
"A conservative scheme for electromagnetic simulation of magnetized plasmas with kinetic electrons". United States. https://doi.org/10.1063/1.5016432. https://www.osti.gov/servlets/purl/1543850.
@article{osti_1543850,
title = {A conservative scheme for electromagnetic simulation of magnetized plasmas with kinetic electrons},
author = {Bao, J. and Lin, Z. and Lu, Z. X.},
abstractNote = {A conservative scheme has been formulated and confirmed for gyrokinetic particle simulations of electromagnetic waves and instabilities in magnetized plasmas. An electron continuity equation derived from the drift kinetic equation is used to time advance the electron density perturbation by using the perturbed mechanical flow calculated from the parallel vector potential, and the parallel vector potential is solved by using the perturbed canonical flow from the perturbed distribution function. In gyrokinetic particle simulations using this new scheme, the shear Alfvén wave dispersion relation in the shearless slab and continuum damping in the sheared cylinder have been recovered. The new scheme overcomes the stringent requirement in the conventional perturbative simulation method that perpendicular grid size needs to be as small as electron collisionless skin depth even for the long wavelength Alfvén waves. The new scheme also circumvents the problem in the typical approach that an unphysically large parallel electric field arises due to the inconsistency between electrostatic potential calculated from the perturbed density and vector potential calculated from the perturbed canonical flow. Lastly, the gyrokinetic particle simulations of the Alfvén waves in sheared cylinder have superior numerical properties compared with the fluid simulations, which suffer from numerical difficulties associated with singular mode structures.},
doi = {10.1063/1.5016432},
journal = {Physics of Plasmas},
number = 2,
volume = 25,
place = {United States},
year = {Fri Feb 23 00:00:00 EST 2018},
month = {Fri Feb 23 00:00:00 EST 2018}
}
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