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Title: Nonlinearity in chorus waves during a geomagnetic storm on 1 November 2012

Abstract

In this study, we investigate the possibility of nonlinearity in chorus waves during a geomagnetic storm on 1 November 2012. The data we use were measured by the Van Allen Probe B. Wave data and plasma sheet electron data are analyzed. Chorus waves were frequently measured in the morning side during the main phase of this storm. Large–amplitude chorus waves were seen of the order of ~0.6 nT and >7 mV/m, which are similar to or larger than the typical ULF waves. The waves quite often consist of rising tones during the burst sampling. Since the rising tone is known as a signature of nonlinearity, a large portion of the waves are regarded as nonlinear at least during the burst sampling periods. These results underline the importance of nonlinearity in the dynamics of chorus waves. We further compare the measurement and the nonlinear theories, based on the inhomogeneity ratio, our own calculation derived from the field equation and the backward wave oscillator model. The wave quantities examined are frequency, amplitude, frequency drift rate, and duration. Furthermore, this type of study is useful to more deeply understand wave-particle interactions and hence may lead to predicting the generation and loss of radiationmore » belt electrons in the future.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [2]; ORCiD logo [3]; ORCiD logo [3];  [4]
  1. Univ. of New Hampshire, Durham, NH (United States)
  2. Univ. of Iowa, Iowa City, IA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of Minnesota, Minneapolis, MN (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
National Aeronautic and Space Administration (NASA); USDOE
OSTI Identifier:
1492527
Report Number(s):
LA-UR-15-25434
Journal ID: ISSN 2169-9380
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 121; Journal Issue: 1; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Heliospheric and Magnetospheric Physics

Citation Formats

Matsui, Hiroshi, Paulson, K. W., Torbert, R. B., Spence, H. E., Kletzing, C. A., Kurth, W. S., Skoug, Ruth M., Larsen, Brian Arthur, and Breneman, A. W. Nonlinearity in chorus waves during a geomagnetic storm on 1 November 2012. United States: N. p., 2016. Web. doi:10.1002/2015JA021772.
Matsui, Hiroshi, Paulson, K. W., Torbert, R. B., Spence, H. E., Kletzing, C. A., Kurth, W. S., Skoug, Ruth M., Larsen, Brian Arthur, & Breneman, A. W. Nonlinearity in chorus waves during a geomagnetic storm on 1 November 2012. United States. doi:10.1002/2015JA021772.
Matsui, Hiroshi, Paulson, K. W., Torbert, R. B., Spence, H. E., Kletzing, C. A., Kurth, W. S., Skoug, Ruth M., Larsen, Brian Arthur, and Breneman, A. W. Fri . "Nonlinearity in chorus waves during a geomagnetic storm on 1 November 2012". United States. doi:10.1002/2015JA021772. https://www.osti.gov/servlets/purl/1492527.
@article{osti_1492527,
title = {Nonlinearity in chorus waves during a geomagnetic storm on 1 November 2012},
author = {Matsui, Hiroshi and Paulson, K. W. and Torbert, R. B. and Spence, H. E. and Kletzing, C. A. and Kurth, W. S. and Skoug, Ruth M. and Larsen, Brian Arthur and Breneman, A. W.},
abstractNote = {In this study, we investigate the possibility of nonlinearity in chorus waves during a geomagnetic storm on 1 November 2012. The data we use were measured by the Van Allen Probe B. Wave data and plasma sheet electron data are analyzed. Chorus waves were frequently measured in the morning side during the main phase of this storm. Large–amplitude chorus waves were seen of the order of ~0.6 nT and >7 mV/m, which are similar to or larger than the typical ULF waves. The waves quite often consist of rising tones during the burst sampling. Since the rising tone is known as a signature of nonlinearity, a large portion of the waves are regarded as nonlinear at least during the burst sampling periods. These results underline the importance of nonlinearity in the dynamics of chorus waves. We further compare the measurement and the nonlinear theories, based on the inhomogeneity ratio, our own calculation derived from the field equation and the backward wave oscillator model. The wave quantities examined are frequency, amplitude, frequency drift rate, and duration. Furthermore, this type of study is useful to more deeply understand wave-particle interactions and hence may lead to predicting the generation and loss of radiation belt electrons in the future.},
doi = {10.1002/2015JA021772},
journal = {Journal of Geophysical Research. Space Physics},
number = 1,
volume = 121,
place = {United States},
year = {2016},
month = {1}
}

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