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Measurement of inner radiation belt electrons with kinetic energy above 1~MeV


AuthorSelesnick, R.;
Keywordselectrons; Inner zone; Radiation belt
AbstractData from the Proton-Electron Telescope on the Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) satellite, taken during 1992\textendash2009, are analyzed for evidence of inner radiation belt electrons with kinetic energy E > 1 MeV. It is found that most of the data from a detector combination with a nominal energy threshold of 1 MeV were, in fact, caused by a chance coincidence response to lower energy electrons or high-energy protons. In particular, there was no detection of inner belt or slot region electrons above 1 MeV following the 2003 Halloween storm injection, though they may have been present. However, by restricting data to a less-stable, low-altitude trapping region, a persistent presence of inner belt electrons in the energy range 1 to 1.6 MeV is demonstrated. Their soft, exponential energy spectra are consistent with extrapolation of lower energy measurements.
Year of Publication2015
JournalJournal of Geophysical Research: Space Physics
Volume120
Number of Pages8339-8349
Section
Date Published10/2015
ISBN
URLhttp://doi.wiley.com/10.1002/2015JA021387
DOI10.1002/2015JA021387