Oblique Whistler-Mode Waves in the Inhomogeneous Magnetospheric Plasma: Resonant Interactions with Energetic Charged Particles

2009 ◽  
Vol 30 (2) ◽  
pp. 55-104 ◽  
Author(s):  
David Shklyar ◽  
Hiroshi Matsumoto
Keyword(s):  
Charged Particles ◽  
Magnetospheric Plasma ◽  
Whistler Mode ◽  
Resonant Interactions ◽  
Whistler Mode Waves

scholarly journals Comparison of formulas for resonant interactions between energetic electrons and oblique whistler-mode waves

2015 ◽  
Vol 22 (5) ◽  
pp. 052902 ◽  
Author(s):  
Jinxing Li ◽  
Jacob Bortnik ◽  
Lun Xie ◽  
Zuyin Pu ◽  
Lunjin Chen ◽  
...  
Keyword(s):  
Whistler Mode ◽  
Energetic Electrons ◽  
Resonant Interactions ◽  
Whistler Mode Waves

A Discussion on the early days of ionospheric research and the theory of electric and magnetic waves in the ionosphere and magnetosphere - Coherent v.l.f. waves in the magnetosphere

1975 ◽  
Vol 280 (1293) ◽  
pp. 137-149 ◽  
Keyword(s):  
Diagnostic Study ◽  
X Rays ◽  
Coherent Signals ◽  
Line Radiation ◽  
Whistler Mode ◽  
Resonant Interactions ◽  
Interchange Energy ◽  
Radiation Belt Electrons ◽  
Whistler Mode Waves ◽  
Physics Experiments

V.l.f. whistler-mode waves in the magnetosphere may be generated by natural lightning and v.l.f. transmitters, or through resonant interactions with radiation belt electrons. Such v.l.f. waves provide information on the hot and cold components of the magnetospheric plasma. Energetic electrons precipitated by whistler-mode waves may generate Bremsstrahlung X-rays and enhance the electron density of the ionosphere. Coherent signals transmitted from the ground can be amplified up to 30 dB in the magnetosphere; the amplified signal may trigger discrete v.l.f. emissions of both rising and falling frequency. V.l.f. line radiation from the magnetosphere is observed, apparently controlled by power line harmonic radiation from the ground. Triggered emission can be explained by using a new principle in which waves and cyclotron-resonant electrons interchange energy through a feedback process. Applications of controlled wave injection include: (1) diagnostic study of the magnetosphere; (2) plasma physics experiments; (3) controlled precipitation; and (4) v.l.f. communications.

scholarly journals Nonlinear interactions between relativistic radiation belt electrons and oblique whistler mode waves

2010 ◽  
Vol 17 (5) ◽  
pp. 599-604 ◽  
Author(s):  
X. Tao ◽  
J. Bortnik
Keyword(s):  
Radiation Belt ◽  
Nonlinear Interactions ◽  
Whistler Mode ◽  
Nonlinear Phase ◽  
Resonant Interactions ◽  
Induced Motion ◽  
Radiation Belt Electrons ◽  
Whistler Mode Waves ◽  
Adiabatic Motion ◽  
Wave Induced

Abstract. Resonant interactions between relativistic charged particles and oblique whistler mode waves are explored in this work, and it is shown that nonlinear phase trapping could happen in a gyrophase averaged sense, consistent with previous studies of interactions between nonrelativistic electrons and oblique whistler mode waves. A dimensionless parameter χ is derived to represent the ratio of wave-induced motion to the adiabatic motion of the particle. We show that phase trapping is likely to occur when the wave-induced motion dominates the adiabatic motion, which is caused mainly by the background fields. A mapping of probable regions of nonlinear interactions is shown based on the parameter χ. We show that the nonlinear interactions might be important near the equatorial plane for even moderate wave amplitude, and the latitudinal range for nonlinear interactions to occur is largest for electrons with local pitch angles around 50 degrees, consistent with previous findings. The results are important for understanding the nonlinear dynamics of relativistic radiation belt electrons and the generation of chorus waves.

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