Energetic electron lensing caused by Ganymede's magnetic field

M. Herceg; J.L. Jørgensen; J.M.G. Merayo; T. Denver; P. S. Jørgensen; M. Benn; S. Kotsiaros; J.E.P. Connerney; S.J. Bolton

doi:10.1016/j.pss.2022.105597

Energetic electron lensing caused by Ganymede's magnetic field

M. Herceg, J.L. Jørgensen, J.M.G. Merayo, T. Denver, P. S. Jørgensen, M. Benn, S. Kotsiaros, J.E.P. Connerney, S.J. Bolton

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Abstract

The micro Advanced Stellar Compass (μASC) continuously monitors high energy particle fluxes in Jupiter's magnetosphere while providing attitude reference for the Juno Magnetic Field investigation. The μASC camera head unit (CHU) serves as a energetic particle sensor monitoring the radiation environment at Jupiter by sensing electrons greater than 15 MeV that pass through the CHU shielding. A comparison of the energetic electron population sampled during many orbits reveals events observed when Juno is traversing Ganymede's M-shell. We present observations of energetic electron depletions related to the interaction with Ganymede's magnetic field. The magnitude and extent of these depletions is associated with Juno's proximity to the magnetic field line passing through Ganymede. Analysis of the observations reveal that the charged particle depletion likely arises from electron scattering in Ganymede's magnetic field, observed within ∼13° phase angle from the moon, beyond which the flux tubes refill due to diffusion.

Original language	English
Article number	105597
Journal	Planetary and Space Science
Volume	224
Number of pages	7
ISSN	0032-0633
DOIs	https://doi.org/10.1016/j.pss.2022.105597
Publication status	Published - 2022

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title = "Energetic electron lensing caused by Ganymede's magnetic field",

abstract = "The micro Advanced Stellar Compass (μASC) continuously monitors high energy particle fluxes in Jupiter's magnetosphere while providing attitude reference for the Juno Magnetic Field investigation. The μASC camera head unit (CHU) serves as a energetic particle sensor monitoring the radiation environment at Jupiter by sensing electrons greater than 15 MeV that pass through the CHU shielding. A comparison of the energetic electron population sampled during many orbits reveals events observed when Juno is traversing Ganymede's M-shell. We present observations of energetic electron depletions related to the interaction with Ganymede's magnetic field. The magnitude and extent of these depletions is associated with Juno's proximity to the magnetic field line passing through Ganymede. Analysis of the observations reveal that the charged particle depletion likely arises from electron scattering in Ganymede's magnetic field, observed within ∼13° phase angle from the moon, beyond which the flux tubes refill due to diffusion.",

author = "M. Herceg and J.L. J{\o}rgensen and J.M.G. Merayo and T. Denver and J{\o}rgensen, {P. S.} and M. Benn and S. Kotsiaros and J.E.P. Connerney and S.J. Bolton",

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doi = "10.1016/j.pss.2022.105597",

language = "English",

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journal = "Planetary and Space Science",

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TY - JOUR

T1 - Energetic electron lensing caused by Ganymede's magnetic field

AU - Herceg, M.

AU - Jørgensen, J.L.

AU - Merayo, J.M.G.

AU - Denver, T.

AU - Jørgensen, P. S.

AU - Benn, M.

AU - Kotsiaros, S.

AU - Connerney, J.E.P.

AU - Bolton, S.J.

PY - 2022

Y1 - 2022

N2 - The micro Advanced Stellar Compass (μASC) continuously monitors high energy particle fluxes in Jupiter's magnetosphere while providing attitude reference for the Juno Magnetic Field investigation. The μASC camera head unit (CHU) serves as a energetic particle sensor monitoring the radiation environment at Jupiter by sensing electrons greater than 15 MeV that pass through the CHU shielding. A comparison of the energetic electron population sampled during many orbits reveals events observed when Juno is traversing Ganymede's M-shell. We present observations of energetic electron depletions related to the interaction with Ganymede's magnetic field. The magnitude and extent of these depletions is associated with Juno's proximity to the magnetic field line passing through Ganymede. Analysis of the observations reveal that the charged particle depletion likely arises from electron scattering in Ganymede's magnetic field, observed within ∼13° phase angle from the moon, beyond which the flux tubes refill due to diffusion.

AB - The micro Advanced Stellar Compass (μASC) continuously monitors high energy particle fluxes in Jupiter's magnetosphere while providing attitude reference for the Juno Magnetic Field investigation. The μASC camera head unit (CHU) serves as a energetic particle sensor monitoring the radiation environment at Jupiter by sensing electrons greater than 15 MeV that pass through the CHU shielding. A comparison of the energetic electron population sampled during many orbits reveals events observed when Juno is traversing Ganymede's M-shell. We present observations of energetic electron depletions related to the interaction with Ganymede's magnetic field. The magnitude and extent of these depletions is associated with Juno's proximity to the magnetic field line passing through Ganymede. Analysis of the observations reveal that the charged particle depletion likely arises from electron scattering in Ganymede's magnetic field, observed within ∼13° phase angle from the moon, beyond which the flux tubes refill due to diffusion.

U2 - 10.1016/j.pss.2022.105597

DO - 10.1016/j.pss.2022.105597

M3 - Journal article

SN - 0032-0633

VL - 224

JO - Planetary and Space Science

JF - Planetary and Space Science

M1 - 105597

ER -

Energetic electron lensing caused by Ganymede's magnetic field

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