scholarly journals Microburst precipitation of energetic electrons associated with chorus wave generation

2010 ◽  
Vol 37 (7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Mitsuru Hikishima ◽  
Yoshiharu Omura ◽  
Danny Summers
Keyword(s):  
Wave Generation ◽  
Energetic Electrons ◽  
Chorus Wave

Fine Structure of Chorus Wave Packets: Comparison Between Observations and Wave Generation Models

2021 ◽  
Author(s):  
X.‐J. Zhang ◽  
A. G. Demekhov ◽  
Y. Katoh ◽  
D. Nunn ◽  
X. Tao ◽  
...  
Keyword(s):  
Fine Structure ◽  
Wave Packets ◽  
Wave Generation ◽  
Chorus Wave

scholarly journals Modeling whistler wave generation regimes in magnetospheric cyclotron maser

2004 ◽  
Vol 22 (10) ◽  
pp. 3561-3570 ◽  
Author(s):  
D. L. Pasmanik ◽  
A. G. Demekhov ◽  
V. Y. Trakhtengerts ◽  
M. Parrot
Keyword(s):  
Source Parameters ◽  
Energetic Electron ◽  
Low Frequency ◽  
Wave Generation ◽  
Whistler Wave ◽  
Particle Precipitation ◽  
Loss Cone ◽  
Energetic Electrons ◽  
Cyclotron Maser ◽  
Different Characteristics

Abstract. Numerical analysis of the model for cyclotron instability in the Earth's magnetosphere is performed. This model, based on the self-consistent set of equations of quasi-linear plasma theory, describes different regimes of wave generation and related energetic particle precipitation. As the source of free energy the injection of energetic electrons with transverse anisotropic distribution function to the interaction region is considered. A parametric study of the model is performed. The main attention is paid to the analysis of generation regimes for different characteristics of energetic electron source, such as the shape of pitch angle distributions and its intensity. Two mechanisms of removal of energetic electrons from a generation region are considered, one is due to the particle precipitation through the loss cone and another one is related to the magnetic drift of energetic particles. It was confirmed that two main regimes occur in this system in the presence of a constant particle source, in the case of precipitation losses. At small source intensity relaxation oscillations were found, whose parameters are in good agreement with simplified analytical theory developed earlier. At a larger source intensity, transition to a periodic generation occurs. In the case of drift losses the regime of self-sustained periodic generation regime is realized for source intensity higher than some threshold. The dependencies of repetition period and dynamic spectrum shape on the source parameters were studied in detail. In addition to simple periodic regimes, those with more complex spectral forms were found. In particular, alteration of spikes with different spectral shape can take place. It was also shown that quasi-stationary generation at the low-frequency band can coexist with periodic modulation at higher frequencies. On the basis of the results obtained, the model for explanation of quasi-periodic whistler wave emissions is verified.

Laboratory simulation of magnetospheric chorus wave generation

2016 ◽  
Vol 59 (1) ◽  
pp. 014016 ◽  
Author(s):  
B Van Compernolle ◽  
X An ◽  
J Bortnik ◽  
R M Thorne ◽  
P Pribyl ◽  
...  
Keyword(s):  
Wave Generation ◽  
Laboratory Simulation ◽  
Chorus Wave
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