U.S. Department of EnergyOffice of Scientific and Technical Information
Dataset from: Improved multispecies Dougherty collisions
Abstract
The Dougherty model Fokker-Planck operator is extended to describe nonlinear full-f collisions between multiple species in plasmas. Simple relations for cross-species primitive moments are developed which obey conservation laws, and reproduce familiar velocity and temperature relaxation rates. This treatment of multispecies Dougherty collisions, valid for arbitrary mass ratios, avoids unphysical temperatures and satisfies the H-theorem unlike an analogous Bhatnagar-Gross-Krook operator. Formulas for both a Cartesian velocity-space and a gyroaveraged operator are provided for use in Vlasov as well as long-wavelength gyrokinetic models. We present an algorithm for the discontinuous Galerkin discretization of this operator, and provide results from relaxation and Landau damping benchmarks.
- Authors:
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;
;
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- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); PPPL
- Univ. of Iowa, Iowa City (United States). Dept. of Physics and Astronomy
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Publication Date:
- DOE Contract Number:
- AC02-09CH11466; SC0018429
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
- OSTI Identifier:
- 1897995
- DOI:
- https://doi.org/10.5281/zenodo.6350748
Citation Formats
Francisquez, Manaure, Juno, James, Hakim, Ammar, Hammett, Gregory W, and Ernst, Darin R. Dataset from: Improved multispecies Dougherty collisions. United States: N. p., 2022.
Web. doi:10.5281/zenodo.6350748.
Francisquez, Manaure, Juno, James, Hakim, Ammar, Hammett, Gregory W, & Ernst, Darin R. Dataset from: Improved multispecies Dougherty collisions. United States. doi:https://doi.org/10.5281/zenodo.6350748
Francisquez, Manaure, Juno, James, Hakim, Ammar, Hammett, Gregory W, and Ernst, Darin R. 2022.
"Dataset from: Improved multispecies Dougherty collisions". United States. doi:https://doi.org/10.5281/zenodo.6350748. https://www.osti.gov/servlets/purl/1897995. Pub date:Sat Mar 12 23:00:00 EST 2022
@article{osti_1897995,
title = {Dataset from: Improved multispecies Dougherty collisions},
author = {Francisquez, Manaure and Juno, James and Hakim, Ammar and Hammett, Gregory W and Ernst, Darin R},
abstractNote = {The Dougherty model Fokker-Planck operator is extended to describe nonlinear full-f collisions between multiple species in plasmas. Simple relations for cross-species primitive moments are developed which obey conservation laws, and reproduce familiar velocity and temperature relaxation rates. This treatment of multispecies Dougherty collisions, valid for arbitrary mass ratios, avoids unphysical temperatures and satisfies the H-theorem unlike an analogous Bhatnagar-Gross-Krook operator. Formulas for both a Cartesian velocity-space and a gyroaveraged operator are provided for use in Vlasov as well as long-wavelength gyrokinetic models. We present an algorithm for the discontinuous Galerkin discretization of this operator, and provide results from relaxation and Landau damping benchmarks.},
doi = {10.5281/zenodo.6350748},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Mar 12 23:00:00 EST 2022},
month = {Sat Mar 12 23:00:00 EST 2022}
}