Generation Process of Large-Amplitude Upper-Band Chorus Emissions Observed by Van Allen Probes
- Kyoto Univ. (Japan). Research Inst. for Sustainable Humanosphere; Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy
- Kyoto Univ. (Japan). Research Inst. for Sustainable Humanosphere
- Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
In this paper, we analyze large-amplitude upper-band chorus emissions measured near the magnetic equator by the Electric and Magnetic Field Instrument Suite and Integrated Science instrument package on board the Van Allen Probes. In setting up the parameters of source electrons exciting the emissions based on theoretical analyses and observational results measured by the Helium Oxygen Proton Electron instrument, we calculate threshold and optimum amplitudes with the nonlinear wave growth theory. We find that the optimum amplitude is larger than the threshold amplitude obtained in the frequency range of the chorus emissions and that the wave amplitudes grow between the threshold and optimum amplitudes. Finally, in the frame of the wave growth process, the nonlinear growth rates are much greater than the linear growth rates.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE; National Aeronautics and Space Administration (NASA); Ministry of Education, Culture, Sports, Science and Technology (MEXT) (Japan); Japan Society for the Promotion of Science (JSPS)
- Grant/Contract Number:
- AC52-06NA25396; NAS5-01072; 16J11490; 17H06140
- OSTI ID:
- 1441311
- Report Number(s):
- LA-UR-17-29191; TRN: US1900891
- Journal Information:
- Journal of Geophysical Research. Space Physics, Vol. 123, Issue 5; ISSN 2169-9380
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Remote Sensing of Radiation Belt Energetic Electrons Using Lightning Triggered Upper Band Chorus
|
journal | January 2019 |
Effects of Ducting on Whistler Mode Chorus or Exohiss in the Outer Radiation Belt
|
journal | June 2019 |
Remote Sensing of Radiation Belt Energetic Electrons Using Lightning Triggered Upper Band Chorus
|
conference | January 2019 |
Similar Records
Generation of extremely low frequency chorus in Van Allen radiation belts: ELF CHORUS GENERATION
Correlated Pc4-5 ULF waves, whistler-mode chorus, and pulsating aurora observed by the Van Allen Probes and ground-based systems