Gyrokinetic Fokker-Planck Collision Operator
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Li-2011-Gyrokinetic Fokker-P.pdf
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Author(s)
Li, Bo
Ernst, Darin R.
Date Issued
May 2011
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Li, B., and D. Ernst. “Gyrokinetic Fokker-Planck Collision Operator.” Physical Review Letters 106.19 (2011). © 2011 American Physical Society
Version
Final published version
Abstract
The gyrokinetic linearized exact Fokker-Planck collision operator is obtained in a form suitable for plasma gyrokinetic equations, for arbitrary mass ratio. The linearized Fokker-Planck operator includes both the test-particle and field-particle contributions, and automatically conserves particles, momentum, and energy, while ensuring non-negative entropy production. Finite gyroradius effects in both field-particle and test-particle terms are evaluated. When implemented in gyrokinetic simulations, these effects can be precomputed. The field-particle operator at each time step requires the evaluation of a single two-dimensional integral, and is not only more accurate, but appears to be less expensive to evaluate than conserving model operators.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.106.195002
