Results 11 to 20 of about 716 (136)
OALib, 2020 It has been shown that a variety of names are assigned to the original MHD Alfven wave derived originally by Hannes Alfven in the 40s (Nature 150, 405-406 (1942)), and those names are used due to the different magnetic geometries where the target plasma could be confined, that is, in laboratory, in fusion, in space, and in astrophysics, where one could
A. S. de Assis +2 more
openaire +1 more source
Geophysical Research Letters, 2023 Results from a 1D kinetic simulation, for the first time, reveal the important role of modified electron acoustic wave (MEAW) in auroral electron acceleration.
Run Shi +4 more
doaj +1 more source
Nonlinear Interaction of Low-frequency Alfvén Waves and Ions
The Astrophysical Journal, 2023 The interaction between Alfvén waves and particles is a critical phenomenon in space and laboratory plasmas, and it has been observed that low-frequency Alfvén waves can accelerate and heat ions through subharmonic resonant interactions.
Xianshu Wu +4 more
doaj +1 more source
Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium
Earth and Space Science, 2023 A 2D Cartesian simulation is presented and used to solve the ideal, low‐beta, linear magnetohydrodynamics equations. A simulation is used to investigate the propagation of Alfvén waves through inhomogeneities in Alfvén speed and density.
R. Davies, A. N. Wright
doaj +1 more source
Phase Mixing of Propagating Alfvén Waves in a Single-fluid Partially Ionized Solar Plasma
The Astrophysical Journal, 2023 The phase mixing of Alfvén waves is one of the most promising mechanisms for the heating of the solar atmosphere. The damping of waves in this case requires small transversal scales, relative to the magnetic field direction; this requirement is achieved ...
M. McMurdo +4 more
doaj +1 more source
Alfven wave studies on PRETEXT [PDF]
AIP Conference Proceedings, 1985 The properties of low frequency Alfven waves in hot, magnetically confined plasmas are quite unlike those in homogeneous media. Extensive theoretical studies have uncovered the Alfven continuum along with global Alfven eigenmodes (GAE). It has been suggested that such modes may be good candidates for rf heating below the ion cyclotron frequency.
Valanju, P. M. +8 more
openaire +2 more sources
Penetration to the Earth's surface of standing Alfvén waves excited by external currents in the ionosphere [PDF]
Annales Geophysicae, 1996 The problem of boundary conditions for monochromatic Alfvén waves, excited in the magnetosphere by external currents in the ionospheric E-layer, is solved analytically. Waves with large azimuthal wave numbers m»1 are considered.
A. S. Leonovich, V. A. Mazur
doaj +1 more source
Laboratory measurements of the physics of auroral electron acceleration by Alfvén waves
Nature Communications, 2021 It was predicted that Alfvén waves can account for the acceleration of precipitating auroral electrons. Here, the authors show laboratory measurements of the resonant transfer of energy from Alfvén waves to electrons under conditions relevant to the ...
J. W. R. Schroeder +6 more
doaj +1 more source
Experimental Generation of Plasma Alfven Waves
Physical Review Letters, 1959 Alfven has postulated the existence of hydromagnetic waves to explain certain sunspot phenomena. An experiment is described in which an effort was made to generate and detect such waves. (A.C.)
Allen, T.K. +3 more
openaire +2 more sources
Parametric excitation of 'kinetic' Alfven waves by whistler waves [PDF]
Plasma Physics, 1977 It is shown that a whistler wave can parametrically decay into another whistler wave plus a kinetic Alfven wave. The parametric coupling occurs due to the electrostatic properties of the kinetic Alfven wave. Corresponding growth rate and threshold condition are obtained.
openaire +1 more source