Understanding Energetic Particle Injections and Their Effect on Earth's Outer Radiation Belt Electrons Using Multipoint
Understanding energetic particle injections and their effect on Earth’s outer radiation belt electrons using multipoint observations Team Leads: Dr. Drew L. Turner (UCLA) and Dr. Geoff Reeves (LANL) Abstract We propose a Space Sciences team to the International Space Science Institute (ISSI) to take advantage of the current, unprecedented level of observational coverage throughout Earth’s inner magnetosphere and conduct focused research pertaining to the dynamics of Earth’s radiation belts. Specifically, we propose an observationally oriented study to address a set of topical questions in magnetospheric physics concerning the nature of energetic particle injections and their importance in driving outer radiation belt variability. Our team is comprised of outstanding researchers hailing from top institutes based in five different European nations, the United States, Canada, Japan, Korea, and China; all of the members share an expertise on observations of particles and waves in Earth’s radiation belts. These members also represent several of the missions providing the data that will serve as the basis for our focused research, namely, NASA’s Van Allen Probes and THEMIS missions, ESA’s Cluster mission, the BARREL Antarctic balloon campaigns, NSF CubeSats, ground-based observatories, and upcoming missions (e.g., ERG). 1. Scientific Rationale, Goals, and Timeliness 1.1 Introduction Earth’s radiation belts consist of dynamic populations of relativistic particles trapped in the geomagnetic field, and there are still many important outstanding questions concerning the drivers of the extreme variability that is observed primarily in the outer electron belt [e.g., Reeves et al., 2003; Millan and Baker, 2012]. Radiation belt particles (ions and electrons) pose a threat to astronauts and other valuable, unmanned space assets, and thus, understanding the extreme variability of this system has become an international priority, with several countries devoting billions of dollars to space missions and research programs to study the belts.
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