A model for energetic electron microsignatures by Jupiter's moons and application for JUICE and Europa Clipper missions

• DOI: 10.5194/epsc2024-1079
• Publication Date: 2024-07-03T12:38:20Z
• Authors: Elias Roussos; Norbert Krupp; Yixin Hao; Markus Fraenz; Chris Paranicas; Peter Kollmann; George Clark; Betty Pei-Chun Be...; Minyi Long
• Keywords: Clipper (electronics); Jupiter (rocket family); Icy moon

The term “microsignatures” refers to localized decreases in trapped particle flux caused by absorption moons or rings that orbit within a planetary magnetosphere. Microsignatures can survive for hours and thus propagate far from the parent moon its magnetospheric interaction region. They evolve under influence of background environment, meaning their profile location trace processes magnetosphere itself, such as transport. are most common electrons few keV up ultra-relativistic range (>10 MeV). A large number microsignature detections at Saturn has revolutionized our understanding energetic transport planet’s radiation belts. However, this date, we lack comprehensive survey satellite microsignatures Jupiter, even though single case studies demonstrate detectability both Galileo Juno datasets. To proceed with detailed study it is necessary first develop framework allows us predict timing verify which conditions, geometries energies predictions successful. complex configuration Jupiter (compared spin-aligned magnetic field Saturn) introduces several challenges. In work, present steps towards developing contrast initial against observations Juno. particular, identify over thirty Jupiter’s innermost (Metis, Adrastea, Amalthea Thebe), region where effects asymmetries greatly enhanced. By testing predicted observed those events, optimize model JUICE Europa Clipper missions Galilean moons. long continuous residence inner magnetosphere, particularly close orbits Europa, Ganymede Callisto, would result unique opportunities probe middle numerous observations.