Dispersion relation for gauge-free electromagnetic drift kinetics

Filippo Zonta*, Riccardo Iorio, Joshua W. Burby, Chang Liu, Eero Hirvijoki

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
4 Downloads (Pure)

Abstract

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. 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. Published under an exclusive license by AIP Publishing.

Original languageEnglish
Article number092504
Number of pages6
JournalPhysics of Plasmas
Volume28
Issue number9
DOIs
Publication statusPublished - 1 Sep 2021
MoE publication typeA1 Journal article-refereed

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