Transitional behavior of different energy protons based on Van Allen Probes observations
Abstract
Understanding the dynamical behavior of ~1 eV to 50 keV ions and identifying the energies at which the morphologies transit are important in that they involve the relative intensities and distributions of the large-scale electric and magnetic fields, the outflow, and recombination rates. However, there have been only few direct observational investigations of the transition in drift behaviors of different energy ions before the Van Allen Probes era. In this paper, we statistically analyze ~1 eV to 50 keV hydrogen (H+) differential flux distributions near geomagnetic equator by using Van Allen Probes observations to investigate the H+ dynamics under the regulation of large-scale electric and magnetic fields. Our survey clearly indicates three types of H+ behaviors within different energy ranges, which is consistent with previous theory predictions. Finally, using simple electric and magnetic field models in UBK coordinates, we have further constrained the source regions of different energy ions and their drift directions.
- Authors:
-
[1];
[2];
[3];
[2];
[2];
[4];
[5]
- Univ. of California, Los Angeles, CA (United States). Dept. of Atmospheric and Oceanic Sciences; University Corporation for Atmospheric Research (UCAR), Boulder, CO (United States)
- Univ. of California, Los Angeles, CA (United States). Dept. of Atmospheric and Oceanic Sciences
- Univ. of Texas, Dallas, TX (United States). Physics Dept.
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); New Mexico Consortium, Los Alamos, NM (United States)
- Univ. of New Hampshire, Durham, NH (United States). Inst. for the Study of Earth, Oceans, and Space
- Publication Date:
- Research Org.:
- Univ. of California, Los Angeles, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE; National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1402624
- Report Number(s):
- LA-UR-17-20873
Journal ID: ISSN 0094-8276; TRN: US1702882
- Grant/Contract Number:
- AC52-06NA25396; NNX13AI61G; NAS5-01072
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 44; Journal Issue: 2; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; transition in drift behavior; UBK method
Citation Formats
Yue, Chao, Bortnik, Jacob, Chen, Lunjin, Ma, Qianli, Thorne, Richard M., Reeves, Geoffrey D., and Spence, Harlan E. Transitional behavior of different energy protons based on Van Allen Probes observations. United States: N. p., 2016.
Web. doi:10.1002/2016GL071324.
Yue, Chao, Bortnik, Jacob, Chen, Lunjin, Ma, Qianli, Thorne, Richard M., Reeves, Geoffrey D., & Spence, Harlan E. Transitional behavior of different energy protons based on Van Allen Probes observations. United States. https://doi.org/10.1002/2016GL071324
Yue, Chao, Bortnik, Jacob, Chen, Lunjin, Ma, Qianli, Thorne, Richard M., Reeves, Geoffrey D., and Spence, Harlan E. Fri .
"Transitional behavior of different energy protons based on Van Allen Probes observations". United States. https://doi.org/10.1002/2016GL071324. https://www.osti.gov/servlets/purl/1402624.
@article{osti_1402624,
title = {Transitional behavior of different energy protons based on Van Allen Probes observations},
author = {Yue, Chao and Bortnik, Jacob and Chen, Lunjin and Ma, Qianli and Thorne, Richard M. and Reeves, Geoffrey D. and Spence, Harlan E.},
abstractNote = {Understanding the dynamical behavior of ~1 eV to 50 keV ions and identifying the energies at which the morphologies transit are important in that they involve the relative intensities and distributions of the large-scale electric and magnetic fields, the outflow, and recombination rates. However, there have been only few direct observational investigations of the transition in drift behaviors of different energy ions before the Van Allen Probes era. In this paper, we statistically analyze ~1 eV to 50 keV hydrogen (H+) differential flux distributions near geomagnetic equator by using Van Allen Probes observations to investigate the H+ dynamics under the regulation of large-scale electric and magnetic fields. Our survey clearly indicates three types of H+ behaviors within different energy ranges, which is consistent with previous theory predictions. Finally, using simple electric and magnetic field models in UBK coordinates, we have further constrained the source regions of different energy ions and their drift directions.},
doi = {10.1002/2016GL071324},
journal = {Geophysical Research Letters},
number = 2,
volume = 44,
place = {United States},
year = {Fri Dec 09 00:00:00 EST 2016},
month = {Fri Dec 09 00:00:00 EST 2016}
}
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