2 Jun 2022 Jan 2030 Sep 2032 Jun months 1 month 9 months 11 months 9 months Launch Ariane-5 Jupiter orbit insertion Transfer to Callisto Europa phase: 2 Europa + 2 Callisto flybys Jupiter High Latitude Phase Transfer to Callisto Ganymede Orbit insertion Ganymede tour: Orbits at several altitudes: High altitude 500 km 200km End of nominal mission Next Class-L (Large) ESA Mission

Europa Ganymede Callisto 3

4 Extra Solar Planetary Systems The Plasma Universe PlanetaryAtmospheres

5 Possible configuration for Scientific Payload accomodation

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7 Courtesy of H.B.Garret, Jet Prop.Lab Synchrotron emission observations Synchrotron emission predictions from Divine model

8 40 MeV 300 keV

9 1RadiationHousekeeping 2 Alert and safeguarding 3 Support to platform and payload 4 Future mission preparation & provision of science data

10 Phase A RADEM Model (PSI)

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12 Proton Telescope 8 Si layers, 8mm Copper shielding) Electron Spectrometer permanent magnet Credits to Wojtek Hadjas & Laurent Desorgher ESA Space Radiation Workshop, May 2012

13 Ganymede Flyby DATA: EPD measurements Galileo G29 encounter with Ganymede December 2000

14 31 Si sensors (300 μm)  = 22.5 o,  φ = 36 o & FOV= 7.2 o Shielding: 8 mm Copper to electrons with E < 10 MeV stop electrons with E < 10 MeV 300 μm Al absorber stops e- with E < 300 keV & protons with E< 6 MeV e- with E < 300 keV & protons with E< 6 MeV y z x y

15 θ e- Primary Electron Incident angle θ (deg) 300keV- 10 MeV Electrons > 10 MeV

16 300keV- 10 MeV electrons Primary Electron Incident angle θ vs ϕ (deg) 300keV- 10 MeV Electrons Primary Electron Incident angle θ (deg) vs Kinetic Energy (MeV))

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20 The exploration of the Jovian System is an engineering & scientific challenge RADEM will be ESA “small” tool to study the Energetic Particle Environment of a giant and complex magnetosphere

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27 Deposited Energy vs. Primary Electron Kinetic Energy (MeV)

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Europa Ganymede Callisto Io Jupiter 30 Ice layer. Thickness? Liquid water? Surface and Subsurface composition Geology Loc environment Interaction with JM Ice layer. Thickness? Liquid water? a cold rigid ice crust, an outer warm ice mantle, an inner silicate mantle, and a metallic core

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32 Model of Callisto's internal structure showing a surface ice layer, a possible liquid water layer, and an ice-rock interior

33 Model of Europa's interior showing a solid ice crust over a layer of liquid water or soft ice, a silicate mantle and a metallic core.

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35 Worst case integral electron flux spectra for worst averaged over 24 h and 20 min. Earth - GEO Jupiter - JUICE Electron Flux #/(cm 2.sr.s) 0.2 MeV5 MeV Jupiter -JUICE~5 x E+7~5 x E+5 Earth - GEO1 x E+7 /4π1 x E+1 /4π

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