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Juno-JADE Observations of Proton Bands Within Io and Europa Flux Tube Crossings

Presentation #309.06 in the session Giant Planet Magnetospheres, Ionospheres and Aurorae (Oral Presentation)

Published onOct 23, 2023
Juno-JADE Observations of Proton Bands Within Io and Europa Flux Tube Crossings

As part of its orbit around Jupiter, Juno frequently passes through magnetic flux tubes that are connected to Jupiter’s moons or to the standing Alfvén wave system generated due to the moons’ electromagnetic interaction with Jupiter’s magnetosphere. It has been shown previously that these flux tube crossings are often associated by an increase in electron flux, increase in proton flux, and intense electromagnetic fluctuations. In this work, we analyze the distribution of protons observed within these crossings using data collected by the JADE instrument. We find instances when protons flux enhancements occur at discrete energies, producing ‘bands’ in the energy spectra. We survey all of Juno’s Io and Europa flux-tube crossings to identify events where these bands are observed and study their characteristics such as the observed energies of the bands, the pitch angle distribution, and the relationship to other parameters such as the satellite’s Alfvénic longitude with respect to Juno.

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