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Understanding relativistic electron losses with BARREL


AuthorMillan, R.M.;
Keywordsinner magnetosphere; precipitation; Radiation belts; relativistic electrons; Van Allen Probes; wave-particle interactions
AbstractThe primary scientific objective of the Balloon Array for RBSP Relativistic Electron Losses (BARREL) is to understand the processes responsible for scattering relativistic electrons into Earth\textquoterights atmosphere. BARREL is the first Living with a Star Geospace Mission of Opportunity, and will consist of two Antarctic balloon campaigns conducted in the 2012 and 2013 Austral summer seasons. During each campaign, a total of 20 small View the MathML source(\~20kg) balloon payloads will be launched, providing multi-point measurements of electron precipitation in conjunction with in situ measurements from the two RBSP spacecraft, scheduled to launch in May 2012. In this paper we outline the scientific objectives of BARREL, highlighting a few key science questions that will be addressed by BARREL in concert with other ILWS missions in order to understand loss processes in the radiation belts. A summary of observations from the 2008/2009 BARREL test flight is also presented. Electron precipitation was observed during a geomagnetic storm on February 14\textendash18, 2009. This storm, though relatively weak (Dst=-36 nT), was remarkably effective in increasing the trapped electron population.
Year of Publication2011
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume73
Number of Pages1425-1434
Section
Date Published07/2011
ISBN
URLhttp://www.sciencedirect.com/science/article/pii/S1364682611000071
DOI10.1016/j.jastp.2011.01.006