Evolution of High‐ m Poloidal Alfvén Waves in a Dipole Magnetic Field
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Geophysical Research"
DOI: 10.1029/2020ja028187
Abstract: We investigate how initially high-m, poloidal Alfvén waves evolve using a numerical model solving the ideal, cold, linear magnetohydrodynamic (MHD) equations in a 2-D dipole coordinate system. The curved magnetic geometry provides a key difference… read more here.
Keywords: high poloidal; field; poloidal; geometry ... See more keywords
Electron Energization by Dispersive Alfvén Waves in the Cusp
Sign Up to like & getrecommendations! Published in 2025 at "Geophysical Research Letters"
DOI: 10.1029/2025gl116922
Abstract: The propagation of kinetic Alfvén waves (assumed sourced from intermittent dayside reconnection) is investigated with a gyrofluid‐kinetic electron model compared with Cluster observations. These observations reveal electron distributions that are preferentially field‐aligned or field‐opposed, with… read more here.
Keywords: energization dispersive; alfv waves; alfv; electron energization ... See more keywords
Toroidal Alfvén mode instability driven by plasma current in low-density Ohmic plasmas of the spherical tori
Sign Up to like & getrecommendations! Published in 2024 at "Physics of Plasmas"
DOI: 10.1063/5.0223920
Abstract: Due to intrinsically low magnetic fields, at low density the drift speed of the current-carrying electrons in spherical tokamaks can exceed fraction of the Alfvén speed sufficient for the excitation of the Alfvén gap modes.… read more here.
Keywords: drift speed; plasmas; mode; low density ... See more keywords
Torsional Alfvén waves in a dipolar magnetic field: experiments and simulations
Sign Up to like & getrecommendations! Published in 2019 at "Geophysical Journal International"
DOI: 10.1093/gji/ggz112
Abstract: The discovery of torsional Alfvén waves (geostrophic Alfvén waves) in the Earth’s core (Gillet et al. 2010) calls for a better understanding of their properties. We present the first experimental observations of torsional Alfvén waves, performed… read more here.
Keywords: alfv; alfv waves; inner sphere; magnetic field ... See more keywords
Nonlinear Compressional Alfvén Waves in a Fully Relativistic Electron–Positron Plasma
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Plasma Science"
DOI: 10.1109/tps.2017.2665628
Abstract: A theoretical investigation has been carried out to study the nonlinear propagation of high-frequency electromagnetic (EM) waves in a magnetized relativistic rotating electron–positron plasma. The Korteweg-de Vries (K-dV) equation is derived by employing the reductive… read more here.
Keywords: positron; positron plasma; alfv; electron ... See more keywords
Assessing the global Alfvén wave power flow into and out of the auroral acceleration region during geomagnetic storms
Sign Up to like & getrecommendations! Published in 2019 at "Science Advances"
DOI: 10.1126/sciadv.aav8411
Abstract: Global Alfvén wave power above the auroral zone increases fourfold during geomagnetic storms. Geomagnetic storms are large space weather events with potentially tremendous societal implications. During these storms, the transfer of energy from the solar… read more here.
Keywords: alfv wave; auroral acceleration; power; geomagnetic storms ... See more keywords
Characteristics of the Energy Transfer by Alfvén Waves in the Solar Atmosphere
Sign Up to like & getrecommendations! Published in 2020 at "Geomagnetism and Aeronomy"
DOI: 10.1134/s0016793220040143
Abstract: The propagation of linear Alfvén waves with periods of 10–200 s from the photosphere to the solar chromosphere under the conditions of an isothermal atmosphere taking into account the amplitude-phase relationships are considered. It was… read more here.
Keywords: characteristics energy; energy transfer; alfv; alfv waves ... See more keywords