Plasma turbulence in the equatorial electrojet: A two-dimensional Hamiltonian fluid model

Ehab Hassan; I. Keramidas Charidakos; P. J. Morrison; D. R. Hatch; W. Horton

doi:10.1063/1.4989709

Plasma turbulence in the equatorial electrojet: A two-dimensional Hamiltonian fluid model

Ehab Hassan, I. Keramidas Charidakos, P. J. Morrison, D. R. Hatch, W. Horton

Research output: Contribution to journal › Article › peer-review

Abstract

A nonlinear unified fluid model that describes the Equatorial Electrojet, including the Farley-Buneman and gradient-drift plasma instabilities, is defined and shown to be a noncanonical Hamiltonian system. Two geometric constants of motion for the model are obtained and shown to be Casimir invariants. A reformulation of the model shows the roles of the density-gradient scale-length (L_n) and the cross-field drift-velocity (υE) in controlling the dynamics of unstable modes in the growing, transition, and saturation phases of a simulation.

Original language	English
Article number	072301
Journal	Physics of Plasmas
Volume	24
Issue number	7
DOIs	https://doi.org/10.1063/1.4989709
State	Published - Jul 1 2017
Externally published	Yes

Funding

This work was supported by U.S. Department of Energy under Contract No. #DE-FG02-04ER-54742. P.J.M. would like to acknowledge support from the Humboldt Foundation and the hospitality of the Numerical Plasma Physics Division of the IPP, Max Planck, Garching.

Funders	Funder number
Max Planck
U.S. Department of Energy	FG02-04ER-54742
Alexander von Humboldt-Stiftung

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Plasma turbulence in the equatorial electrojet: A two-dimensional Hamiltonian fluid model

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