Spatiotemporal characteristics of ultra-low frequency dispersive scale shear Alfvén waves in the Earth’s magnetosphere

2004 ◽  
Vol 11 (4) ◽  
pp. 1268-1276 ◽  
Author(s):  
R. Rankin ◽  
J. Y. Lu ◽  
R. Marchand ◽  
E. F. Donovan
Keyword(s):  
Low Frequency ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Earth’S Magnetosphere ◽  
Spatiotemporal Characteristics ◽  
Earth's Magnetosphere ◽  
Shear Alfven Waves ◽  
Scale Shear

Nonlinear standing shear Alfvén waves in the Earth's magnetosphere

1994 ◽  
Vol 99 (A11) ◽  
pp. 21291 ◽  
Author(s):  
R. Rankin ◽  
P. Frycz ◽  
V. T. Tikhonchuk ◽  
J. C. Samson
Keyword(s):  
Alfven Waves ◽  
Alfvén Waves ◽  
Earth’S Magnetosphere ◽  
Earth's Magnetosphere ◽  
Shear Alfven Waves

Density cavity formation by large-scale shear Alfvén waves

2010 ◽  
Vol 91 (6) ◽  
pp. 69003 ◽  
Author(s):  
Nagendra Singh ◽  
Manish Yeladandi ◽  
Sudeepth Araveti
Keyword(s):  
Large Scale ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Cavity Formation ◽  
Shear Alfven Waves ◽  
Scale Shear

The α-effect generated by standing Alfvén waves

1988 ◽  
Vol 40 (2) ◽  
pp. 353-358 ◽  
Author(s):  
Tomikazu Namikawa ◽  
Hiromitsu Hamabata
Keyword(s):  
Magnetic Field ◽  
Electromotive Force ◽  
Particle Flux ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Earth’S Magnetosphere ◽  
Earth's Magnetosphere ◽  
The Mean

The mean electromotive force generated by nonlinear standing Alfvén waves propagating along the mean magnetic field is investigated. It is shown that the α-effect can exist owing to the interaction between oppositely propagating two waves, provided that the initial fields have non-zero helicity. The result is discussed in the context of field-aligned currents and periodic particle flux variations in the earth's magnetosphere.

scholarly journals Polarization properties of standing shear Alfvén waves in non-axisymmetric background magnetic fields

2007 ◽  
Vol 25 (3) ◽  
pp. 815-822 ◽  
Author(s):  
K. Kabin ◽  
R. Rankin ◽  
I. R. Mann ◽  
A. W. Degeling ◽  
R. Marchand
Keyword(s):  
Geomagnetic Field ◽  
Radiation Belt ◽  
Low Frequency ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Ulf Waves ◽  
Outer Radiation Belt ◽  
Simple Description ◽  
The Waves ◽  
Shear Alfven Waves

Abstract. In this paper we present results concerning periods and polarizations of cold plasma ultra-low frequency (ULF) guided Alfvén waves in a non-axisymmetric geomagnetic field. The background geomagnetic field is approximated by a compressed dipole for which we propose a simple description in terms of Euler potentials. This study is motivated by the problem of outer-radiation belt electron acceleration by ULF waves, for which the polarization of the wave is of paramount importance. We consider an approximation appropriate to decoupled Alfvénic waves and find that the polarization of the waves can change significantly with local time. Therefore, the ULF wave's contribution to the MeV electron energization process can be localized in space.

Sign in / Sign up

Export Citation Format

Share Document