Unusual Loss of Van Allen Belt Relativistic Electrons by Extremely Low‐Frequency Chorus

2020 ◽  
Vol 47 (18) ◽  
Author(s):  
Si Liu ◽  
Yanqiong Xie ◽  
Sai Zhang ◽  
Xiongjun Shang ◽  
Chang Yang ◽  
...  
Keyword(s):  
Low Frequency ◽  
Relativistic Electrons ◽  
Extremely Low Frequency

The generatin of extremely low-frequency chorus waves associated with plasma density enhancement

2021 ◽  
Author(s):  
Qian He ◽  
Si Liu
Keyword(s):  
Plasma Density ◽  
Low Frequency ◽  
Satellite Orbit ◽  
Correlated Data ◽  
Relativistic Electrons ◽  
Generation Process ◽  
Extremely Low Frequency ◽  
Chorus Waves ◽  
Open Question ◽  
Scattering Losses

<p>Chorus waves with extremely low frequency (ELF) below 0.1 f<sub>ce</sub> are proposed to be a potential mechanism of scattering losses of relativistic electrons in the radiation belt. However, the generation of ELF chorus is still an open question. Here we report three interesting events that the occurrence of ELF chorus waves shows evident correlation with the increase of background plasma density while the disturbance of ambient magnetic field is negligible. We calculate the growth rate of chorus waves by using the correlated data of waves and particles form the Van Allen Probes. The calculated growth rates agree well with the wave along the satellite orbit. The current study suggests that the plasma density may play an important role on controlling the wave frequency during the chorus generation process.</p>

The characteristics and present state for Extremely Low Frequency-Magnetic Fields of metropolitan subway

2015 ◽  
Vol 14 (1) ◽  
pp. 7-15
Author(s):  
Dae-kwan Jung ◽  
◽  
Joon-sig Jung ◽  
Kyu-mok Lee ◽  
Hyung-kyu Park ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Present State ◽  
Low Frequency ◽  
Extremely Low Frequency
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