Nonlinear Gyrokinetic Coulomb Collision Operator
| Autor: | B. J. Frei, Rogerio Jorge, Paolo Ricci |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Coulomb collision Gyroradius Operator (physics) Magnetic confinement fusion FOS: Physical sciences CRPP_EDGE Condensed Matter Physics 01 natural sciences Physics - Plasma Physics 010305 fluids & plasmas Plasma Physics (physics.plasm-ph) Polynomial basis Nonlinear system Classical mechanics Distribution function Physics::Plasma Physics 0103 physical sciences 010306 general physics Multipole expansion |
| Zdroj: | Journal of Plasma Physics |
| DOI: | 10.48550/arxiv.1906.03252 |
| Popis: | A gyrokinetic Coulomb collision operator is derived, which is particularly useful to describe the plasma dynamics at the periphery region of magnetic confinement fusion devices. The derived operator is able to describe collisions occurring in distribution functions arbitrarily far from equilibrium with variations on spatial scales at and below the particle Larmor radius. A multipole expansion of the Rosenbluth potentials is used in order to derive the dependence of the full Coulomb collision operator on the particle gyroangle. The full Coulomb collision operator is then expressed in gyrocentre phase-space coordinates, and a closed formula for its gyroaverage in terms of the moments of the gyrocenter distribution function in a form ready to be numerically implemented is provided. Furthermore, the collision operator is projected onto a Hermite-Laguerre velocity space polynomial basis and expansions in the small electron-to-ion mass ratio are provided. Comment: 30 pages |
| Databáze: | OpenAIRE |
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