Predicting electromagnetic ion cyclotron wave amplitude from unstable ring current plasma conditions
Abstract
Electromagnetic ion cyclotron (EMIC) waves in the Earth's inner magnetosphere are enhanced fluctuations driven unstable by ring current ion temperature anisotropy. EMIC waves can resonate with relativistic electrons and play an important role in precipitation of MeV radiation belt electrons. In this study, we investigate the excitation and saturation of EMIC instability in a homogeneous plasma using both linear theory and nonlinear hybrid simulations. We have explored a four-dimensional parameter space, carried out a large number of simulations, and derived a scaling formula that relates the saturation EMIC wave amplitude to initial plasma conditions. Finally, such scaling can be used in conjunction with ring current models like ring current-atmosphere interactions model with self-consistent magnetic field to provide global dynamic EMIC wave maps that will be more accurate inputs for radiation belt modeling than statistical models.
- Authors:
-
- New Mexico Consortium, Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Space Science Inst., Boulder, CO (United States)
- New Mexico Consortium, Los Alamos, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF)
- OSTI Identifier:
- 1402622
- Report Number(s):
- LA-UR-17-20226
Journal ID: ISSN 2169-9380; TRN: US1703013
- Grant/Contract Number:
- AC52-06NA25396; NNH13AW83I; NNH14AX90I; NNG13PJ05I; 1303300
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Space Physics
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 11; Journal ID: ISSN 2169-9380
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; EMIC; scaling; hybrid simulation; plasma waves and instabilities; kinetic waves and instabilities; ring current; wave/particle interactions
Citation Formats
Fu, Xiangrong, Cowee, Misa M., Jordanova, Vania K., Gary, S. Peter, Reeves, Geoffrey D., and Winske, Dan. Predicting electromagnetic ion cyclotron wave amplitude from unstable ring current plasma conditions. United States: N. p., 2016.
Web. doi:10.1002/2016JA023303.
Fu, Xiangrong, Cowee, Misa M., Jordanova, Vania K., Gary, S. Peter, Reeves, Geoffrey D., & Winske, Dan. Predicting electromagnetic ion cyclotron wave amplitude from unstable ring current plasma conditions. United States. https://doi.org/10.1002/2016JA023303
Fu, Xiangrong, Cowee, Misa M., Jordanova, Vania K., Gary, S. Peter, Reeves, Geoffrey D., and Winske, Dan. Tue .
"Predicting electromagnetic ion cyclotron wave amplitude from unstable ring current plasma conditions". United States. https://doi.org/10.1002/2016JA023303. https://www.osti.gov/servlets/purl/1402622.
@article{osti_1402622,
title = {Predicting electromagnetic ion cyclotron wave amplitude from unstable ring current plasma conditions},
author = {Fu, Xiangrong and Cowee, Misa M. and Jordanova, Vania K. and Gary, S. Peter and Reeves, Geoffrey D. and Winske, Dan},
abstractNote = {Electromagnetic ion cyclotron (EMIC) waves in the Earth's inner magnetosphere are enhanced fluctuations driven unstable by ring current ion temperature anisotropy. EMIC waves can resonate with relativistic electrons and play an important role in precipitation of MeV radiation belt electrons. In this study, we investigate the excitation and saturation of EMIC instability in a homogeneous plasma using both linear theory and nonlinear hybrid simulations. We have explored a four-dimensional parameter space, carried out a large number of simulations, and derived a scaling formula that relates the saturation EMIC wave amplitude to initial plasma conditions. Finally, such scaling can be used in conjunction with ring current models like ring current-atmosphere interactions model with self-consistent magnetic field to provide global dynamic EMIC wave maps that will be more accurate inputs for radiation belt modeling than statistical models.},
doi = {10.1002/2016JA023303},
journal = {Journal of Geophysical Research. Space Physics},
number = 11,
volume = 121,
place = {United States},
year = {Tue Nov 01 00:00:00 EDT 2016},
month = {Tue Nov 01 00:00:00 EDT 2016}
}
Web of Science
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Works referencing / citing this record:
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