A drift-kinetic analytical model for scrape-off layer plasma dynamics at arbitrary collisionality
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Author(s)
Jorge, R.
Ricci, P.
Gomes Loureiro, Nuno F
Alternative Title
A drift-kinetic analytical model for scrape-off layer plasma dynamics at arbitrary collisionality
Date Issued
November 2017
Journal
Journal of Plasma Physics
Publisher
Cambridge University Press (CUP)
Citation
Jorge, R. et al. “A Drift-Kinetic Analytical Model for Scrape-Off Layer Plasma Dynamics at Arbitrary Collisionality.” Journal of Plasma Physics 83, 6 (November 2017): 905830606 © 2017 Cambridge University Press
Version
Author's final manuscript
Abstract
A drift-kinetic model to describe the plasma dynamics in the scrape-off layer region of tokamak devices at arbitrary collisionality is derived. Our formulation is based on a gyroaveraged Lagrangian description of the charged particle motion, and the corresponding drift-kinetic Boltzmann equation that includes a full Coulomb collision operator. Using a Hermite–Laguerre velocity space decomposition of the gyroaveraged distribution function, a set of equations to evolve the coefficients of the expansion is presented. By evaluating explicitly the moments of the Coulomb collision operator, distribution functions arbitrarily far from equilibrium can be studied at arbitrary collisionalities. A fluid closure in the high-collisionality limit is presented, and the corresponding fluid equations are compared with previously derived fluid models.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1017/S002237781700085X
