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

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.

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