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

scholarly journals Radio waves and whistler-mode waves in solar wind and their interactions with energetic electrons

2020 ◽  
Author(s):  
Cynthia Cattell ◽  
Aaron Breneman ◽  
Lindsay Glesener ◽  
Ben Leiran ◽  
Ben Short ◽  
...  
Keyword(s):  
Solar Wind ◽  
Radio Waves ◽  
Whistler Mode ◽  
Energetic Electrons ◽  
Whistler Mode Waves

Solar wind compression induced ULF-modulation of whistler-mode waves in the deep inner magnetosphere

2021 ◽  
Author(s):  
Xiongjun Shang ◽  
Si Liu ◽  
Fuliang Xiao
Keyword(s):  
Solar Wind ◽  
Dynamic Pressure ◽  
Source Region ◽  
Rare Event ◽  
Periodic Pattern ◽  
Ulf Waves ◽  
Wave Source ◽  
Whistler Mode ◽  
Energetic Electrons ◽  
Whistler Mode Waves

<p>With observations of Van Allen Probes, we report a rare event of quasiperiodic whistler-mode waves in the dayside magnetosphere on 20 February 2014 as a response to the enhancement of solar wind dynamic pressure (P<sub>sw</sub>). The intensities of whistler-mode waves and anisotropy distributions of energetic electrons exhibit a ~5 mins quasi-periodic pattern, which is consistent with the period of synchronously observed compressional ULF waves. Based on the wave growth rates calculation, we suggest that the quasiperiodic whistler-mode waves could be generated by the energetic electrons with modulated anisotropy. The Poynting vectors of the whistler-mode waves alternate between northward and southward direction with a period twice the compressional ULF wave's near the equator, also exhibiting a clear modulated feature. This is probably because the intense ULF waves slightly altered the location of the local magnetic minimum, and thus modulated the relative direction of the wave source region respect to the spacecraft. Current results provide a direct evidence that the P<sub>sw</sub> play an important role in the generation and propagation of whistler-mode waves in the Earth's magnetosphere.</p>

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.

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