A Survey of Electron Conics at Jupiter Utilizing the JADE‐E Data During Science Orbits 01, 03‐30

Abstract

Electron conics were first discovered at Earth using the High Altitude Plasma Instrument (HAPI) aboard the Dynamics Explorer 1 (DE-1) spacecraft (Menietti & Burch, 1985). Menietti and Burch (1985) reported upward going electron distributions that peak at angles oblique to the local magnetic field, specifically, the electron conic pitch angle is just a little closer to 90° than the loss cone. For instance, if the loss cone has a pitch angle of 155°, then the electron conic will peak at a pitch angle less than 155°. Menietti and Burch (1985) observed electron conics within a pitch angle range of 150° and 170°. Two examples in that study showed data from the nightside main auroral region, and one example showed data from the polar cap. The electron conics in the nightside main auroral region appeared within the energy range of 2-5 keV, while those observed in the polar cap had energies on the order of 0.05-4 keV (Menietti & Burch, 1985). Electron conics of this nature are referred to as Type 1 electron conics by