Dispersion relation for gauge-free electromagnetic drift kinetics

Journal Article · 07 September 2021 · Physics of Plasmas

DOI: https://doi.org/10.1063/5.0058118 · OSTI ID:1818943

Zonta, Filippo  ^[1]; Iorio, Riccardo  ^[1]; Burby, Joshua W.  ^[2]; Liu, Chang  ^[3]; Hirvijoki, Eero  ^[1]

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1. Aalto Univ. (Finland)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Recently, a new approach to gyrokinetics, invariant under electromagnetic gauge transformations, was developed. The gyrocenter equations of motion are now expressed in terms of the perturbed fields instead of the potentials, in a form suitable for numerical simulations and analytic studies. In this paper, we verify that the long-wavelength limit, i.e., the drift-kinetic limit of the new gyrokinetic theory, is in line with existing work, providing a solid foundation for simulations. Here, we compute the dispersion relation of the new drift-kinetic theory in slab geometry and find agreement with a long-wavelength limit of the full Vlasov–Maxwell model.

• Research Organization: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
• Grant/Contract Number: AC02-09CH11466; 89233218CNA000001
• OSTI ID: 1818943
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 28; ISSN 1070-664X
• Publisher: American Institute of Physics (AIP)Copyright Statement
• Country of Publication: United States
• Language: English