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a. Validation of the proposed major science objectives

a. Validation of the proposed major science objectives. Topic 1: Fast rotator

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a. Validation of the proposed major science objectives

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  1. a. Validation of the proposed major science objectives Topic 1: Fast rotator • Electrodynamics of plasma disk [Plasma Universe]- Stationary state: global structure (B-field, different species, sources/sinks)- Dynamics: Relaxation of rotational energy Processes? Typical spatial and temporal scales (driven, internal?) Consequences (aurora, radio, Xray) • A complex multi phase system [origin, plasma universe]- interaction between ‘neutral’ torus and the plasma disk Topic 1 is coupled to Topic 2  transport of matter

  2. a. Validation of the proposed major science objectives Topic 2: Binary systems • Electrodynamics of interaction [Plasma Universe]- 3 different cases: Io / Europa / Ganymede- MHD / kinetic interaction. Alfvén waves and acceleration (associated aurora, radio emissions and electron beams, Xrays(?))- Pick up ions – source terms • Plasma/surface, plasma/exosphere interactions [Satellite, Plasma Universe]- sputtering- surface weathering, implantation of heavy ions (connection to Bepi-Colombo)- Pick up ions – source terms- Charge exchange processes

  3. a. Validation of the proposed major science objectives Other questions: • Radiation and lifeWhy a so large level of radiation?Combined: magnetic field + rotation + scales • Dusty plasmasPlasma disk / Dust population

  4. b. Identification of the required measurements Measurement requirements: • Magnetic field: 3D @ 100 Hz., 10 kHz 2x • Electric field: 2D @ 40 MHz 1x RS • Plasma: from eV to 10 MeVfew seconds resolution- e- low energy: 3D 2x- ions low energy: (composition?) 3D, up to sulphur… 2x- e- high energy: 1x RS- ions high energy: 1x + radiation monitor EO- neutrals: low energy on EO and high energy on RS- dust 1x EO • A spinning spacecraft is better! • Ground based complementary observations similar to IJW.

  5. Europa Orbiter: Magnetic field (2 kg), Plasma LE (4 kg), Neutrals LE (1.5 kg), Dust (2 kg) Radiation monitor (0.5 kg) 10 kg 8 W in addition Very low energy plasma (Langmuir probe) (0.3 kg) For better understanding magnetospheric interaction add electric field (4 kg) Relay S/C: Magnetic field (2 kg) Electric field (4 kg), Plasma LE+HE (6 kg), Neutrals HE (3 kg)  15 kg 14 W in addition Imager? Xray detector? c. Instruments mass and power(minimal mass, no shielding)

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