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Kinetic models of magnetic flux ropes observed in the Earth magnetosphere
Petrukovich, A. A.; Zelenyi, L. M.; Artemyev, A. V. +3 more
Magnetic flux ropes (MFR) are universal magnetoplasma structures (similar to cylindrical screw pinches) formed in reconnecting current sheets. In particular, MFR with scales from about the ion inertial length to MHD range are widely observed in the Earth magnetosphere. Typical MFR have force-free configuration with the axial magnetic field peaking…
Kinetic models of sub-ion cylindrical magnetic hole
Artemyev, A. V.; Vasko, I. Y.; Yushkov, E. V. +1 more
Magnetic holes are magnetoplasma structures very similar to the classical θ-pinch. They are widely observed in the space plasma and identified by the substantial magnetic field depressions on scales from magnetohydrodynamic range to electron scales. In this paper, we develop the kinetic models of cylindrically symmetric magnetic holes with sub-ion…
Study of electric and magnetic field fluctuations from lower hybrid drift instability waves in the terrestrial magnetotail with the fully kinetic, semi-implicit, adaptive multi level multi domain method
Lapenta, G.; Norgren, C.; Markidis, S. +3 more
The newly developed fully kinetic, semi-implicit, adaptive multi-level multi-domain (MLMD) method is used to simulate, at realistic mass ratio, the development of the lower hybrid drift instability (LHDI) in the terrestrial magnetotail over a large wavenumber range and at a low computational cost. The power spectra of the perpendicular electric fi…
In-situ observations of flux ropes formed in association with a pair of spiral nulls in magnetotail plasmas
Dunlop, Malcolm; He, Jiansen; Xie, Lun +9 more
Signatures of secondary islands are frequently observed in the magnetic reconnection regions of magnetotail plasmas. In this paper, magnetic structures with the secondary-island signatures observed by Cluster are reassembled by a fitting-reconstruction method. The results show three-dimensionally that a secondary island event can manifest the flux…
Spontaneous emission of electromagnetic and electrostatic fluctuations in magnetized plasmas: Quasi-parallel modes
Kim, Sunjung; Yoon, Peter H.; Choe, G. S.
The present paper is devoted to the theoretical and numerical analysis of the spontaneously emitted electromagnetic fluctuations characterized by quasi-parallel wave vectors relative to the ambient magnetic field. The formulation is based upon the Klimontovich plasma kinetic theory. The comparative study is carried out between the spontaneously em…
Generalized double-gradient model of flapping oscillations: Oblique waves
Korovinskiy, D. B.; Kiehas, S. A.
The double-gradient model of flapping oscillations is generalized for oblique plane waves, propagating in the equatorial plane. It is found that longitudinal propagation (ky = 0) is prohibited, while transversal (kx = 0) or nearly transversal waves should possess a maximum frequency, diminishing with the reduction of | k…
Nonlinear effects related to circularly polarized dispersive Alfvén waves
Sharma, R. P.; Gaur, Nidhi; Sharma, Swati
In situ measurements of solar wind have strongly implicated its turbulent behavior. The observed power spectra report a breakpoint around length scales of the order of ion scales. As one of the responsible mechanisms for the observed steepening in power spectrum, our approach includes a right circularly polarized dispersive Alfvén wave (DAW) with …