skip to main content

DOE PAGESDOE PAGES

Title: Generation Process of Large-Amplitude Upper-Band Chorus Emissions Observed by Van Allen Probes

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.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [3] ; ORCiD logo [4]
  1. Kyoto Univ. (Japan). Research Inst. for Sustainable Humanosphere; Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy
  2. Kyoto Univ. (Japan). Research Inst. for Sustainable Humanosphere
  3. Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-17-29191
Journal ID: ISSN 2169-9380
Grant/Contract Number:
AC52-06NA25396; NAS5-01072; 16J11490; 17H06140
Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 123; Journal Issue: 5; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE; National Aeronautic and Space Administration (NASA); Ministry of Education, Culture, Sports, Science and Technology (MEXT) (Japan); Japan Society for the Promotion of Science (JSPS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Heliospheric and Magnetospheric Physics
OSTI Identifier:
1441311

Kubota, Yuko, Omura, Yoshiharu, Kletzing, Craig, and Reeves, Geoffrey. Generation Process of Large-Amplitude Upper-Band Chorus Emissions Observed by Van Allen Probes. United States: N. p., Web. doi:10.1029/2017JA024782.
Kubota, Yuko, Omura, Yoshiharu, Kletzing, Craig, & Reeves, Geoffrey. Generation Process of Large-Amplitude Upper-Band Chorus Emissions Observed by Van Allen Probes. United States. doi:10.1029/2017JA024782.
Kubota, Yuko, Omura, Yoshiharu, Kletzing, Craig, and Reeves, Geoffrey. 2018. "Generation Process of Large-Amplitude Upper-Band Chorus Emissions Observed by Van Allen Probes". United States. doi:10.1029/2017JA024782. https://www.osti.gov/servlets/purl/1441311.
@article{osti_1441311,
title = {Generation Process of Large-Amplitude Upper-Band Chorus Emissions Observed by Van Allen Probes},
author = {Kubota, Yuko and Omura, Yoshiharu and Kletzing, Craig and Reeves, Geoffrey},
abstractNote = {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.},
doi = {10.1029/2017JA024782},
journal = {Journal of Geophysical Research. Space Physics},
number = 5,
volume = 123,
place = {United States},
year = {2018},
month = {4}
}