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New global loss model of energetic and relativistic electrons based on Van Allen Probes measurements

Orlova K., Y. Shprits, M. Spasojevic, (2016), New global loss model of energetic and relativistic electrons based on Van Allen Probes measurements, J. of Geophys. Res. [Space Physics], 121, 1308-1314, doi:10.1002/2015JA021878

Abstract

Abstract The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) instrument on the Van Allen Probes provides a vast quantity of fully resolved wave measurements below L = 5.5, a critical region for radiation belt acceleration and loss. EMFISIS data show that plasmaspheric hiss waves can be observed at frequencies as low as 20 Hz and provide three-component magnetic field measurements that can be directly used for electron scattering calculations. Updated models of hiss properties based on statistical analysis of Van Allen Probes data were recently developed. We use these new models to compute and parameterize the lifetime of electrons as a function of kinetic energy, L shell, Kp index, and magnetic local time. We present a detailed analysis of the electron lifetime sensitivity to the model of the wave intensity and spectral distribution. We also compare the results with previous models of electron loss, which were based on single-component electric field measurements from the sweep frequency receiver on board the CRRES satellite.

Authors (sorted by name)

Orlova Shprits Spasojevic

Journal / Conference

Journal Of Geophysical Research (Space Physics)

Acknowledgments

This research was supported by NSF AGS120374; NASA NN15AJ94G, NNX13AE34G, and NNX10AK99G; and UC Lab Fees Research Program grant 12‐LR‐235337. The work of M. Spasojevic was supported by NASA awards NNX14AC04G and NNX15AI94G. The authors thank the EMFISIS team for the Van Allen Probes data, which were accessed through the EMFISIS website hosted at the University of Iowa. All data sets used in this study can be accessed by contacting the first author.

Grants

12-LR-235337 AGS120374 NN15AJ94G NNX10AK99G NNX13AE34G NNX14AC04G NNX15AI94G

Bibtex

@article{doi:10.1002/2015JA021878,
author = {Orlova, Ksenia and Shprits, Yuri and Spasojevic, Maria},
title = {New global loss model of energetic and relativistic electrons based on Van Allen Probes measurements},
year = {2016},
journal = {Journal of Geophysical Research: Space Physics},
volume = {121},
number = {2},
pages = {1308-1314},
keywords = {energetic electrons, wave-particle interactions, electron scattering},
doi = {10.1002/2015JA021878},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2015JA021878},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021878},
abstract = {Abstract The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) instrument on the Van Allen Probes provides a vast quantity of fully resolved wave measurements below L = 5.5, a critical region for radiation belt acceleration and loss. EMFISIS data show that plasmaspheric hiss waves can be observed at frequencies as low as 20 Hz and provide three-component magnetic field measurements that can be directly used for electron scattering calculations. Updated models of hiss properties based on statistical analysis of Van Allen Probes data were recently developed. We use these new models to compute and parameterize the lifetime of electrons as a function of kinetic energy, L shell, Kp index, and magnetic local time. We present a detailed analysis of the electron lifetime sensitivity to the model of the wave intensity and spectral distribution. We also compare the results with previous models of electron loss, which were based on single-component electric field measurements from the sweep frequency receiver on board the CRRES satellite.}
}