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Title: A drift-kinetic analytical model for scrape-off layer plasma dynamics at arbitrary collisionality

Journal Article · · Journal of Plasma Physics
ORCiD logo [1];  [2];  [3]
  1. Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland); Institute of Superior Tecnico (IST), Lisbon (Portugal)
  2. Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland)
  3. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center

We report 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.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); EUROfusion Consortium; Fundação para a Ciência e Tecnologia (FCT)
Grant/Contract Number:
FG02-91ER54109; 633053; PD/BD/105979/2014
OSTI ID:
1538926
Report Number(s):
PSFC/JA-17-36; PII: S002237781700085X
Journal Information:
Journal of Plasma Physics, Vol. 83, Issue 6; ISSN 0022-3778
Publisher:
Cambridge University PressCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (5)

Theory of the Drift-Wave Instability at Arbitrary Collisionality text January 2018
Multiscale modelling for tokamak pedestals journal April 2018
Linear Theory of Electron-Plasma Waves at Arbitrary Collisionality text January 2018
The effect of background flow shear on gyrokinetic turbulence in the cold ion limit text January 2018
Electron skin depth in low density plasmas journal January 2020

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