The Gaussian Radial Basis Function Method for Plasma Kinetic Theory
Artikel i vetenskaplig tidskrift, 2015

Description of a magnetized plasma involves the Vlasov equation supplemented with the non-linear Fokker–Planck collision operator. For non-Maxwellian distributions, the collision operator, however, is difficult to compute. In this Letter, we introduce Gaussian Radial Basis Functions (RBFs) to discretize the velocity space of the entire kinetic system, and give the corresponding analytical expressions for the Vlasov and collision operator. Outlining the general theory, we also highlight the connection to plasma fluid theories, and give 2D and 3D numerical solutions of the non-linear Fokker–Planck equation. Applications are anticipated in both astrophysical and laboratory plasmas.

Kinetic theory

Fokker-Planck

Non-linear

Coulomb collisions

Författare

Eero Hirvijoki

Chalmers, Teknisk fysik, Nukleär teknik

Jeff Candy

General Atomics

E Belli

General Atomics

Ola Embréus

Chalmers, Teknisk fysik, Nukleär teknik

Physics Letters, Section A: General, Atomic and Solid State Physics

0375-9601 (ISSN)

Vol. 379 42 2735-2739

Drivkrafter

Hållbar utveckling

Fundament

Grundläggande vetenskaper

Ämneskategorier

Fusion, plasma och rymdfysik

DOI

10.1016/j.physleta.2015.08.010

Mer information

Skapat

2017-10-07