IMPRS Lecture Sep 2005

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Jupiter WorkshopToulouse, Oct.
2005Plasma/energetic particle measurements for
a new mission to JupiterN. Krupp et
al.Max-Planck-Institut für Sonnensystemforschung
Katlenburg-Lindau, Germany
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Particle measurements in the Jovian system, a
tool to investigate

• the global configuration of the Jovian
  magnetosphere beyond Galileo
• determination of the charged particle population
  (ion composition and charge states as well as
  electrons) in the magnetosphere
• determination of the neutral particle population
• determination of the global flow patterns of
  plasma and energetic particles in the system,
  especially in the vicinity of the Galilean moons
• the dynamics of the Jovian system beyond Galileo
• interchange motion/radial transport of plasma and
  energetic particles
• mechanisms of particle injections and its
  consequences correlation with auroral emissions
• tail dynamics (reconnection, flow bursts, ...)
• up/downstream particles (Jupiter as particle
  source)
• the interaction of the magnetospheric plasma with
  the moons and rings
• investigate the local environment of the moons
  and rings
• investigate existing particle beams along the
  flux tubes connecting the moons with the
  aurora/ionosphere of Jupiter
• determine in detail the structure and composition
  of the plasma tori of Europa and Io
• determine the surface composition of the moons by
  analysing the sputtered material

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Charge Energy Mass Spectrometer (CHEMS) on
Cassini records fingerprints of ion composition
at Earth, Jupiter, and Saturn
Charge states of energetic ions in Jupiters
magnetosphere poorly measured
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Global configuration of Jupiters magnetosphere
neutral and charged particle population
Energetic neutral atom emissions from Jupiter
Cassini/MIMI results (Krimigis, 2001)
Global flow pattern from Galileo/EPD measurements
(Krupp, 2001 Woch, 2002)
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Dynamics in Jupiters magnetosphereEnergetic
Particle measurements correlation to auroral
emissions
Most prominent and well defined boundary ?
change in the electron pitch angle distributions
located between 10 and 17 RJ.
Tomas, 2004, 2005
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Dynamics in Jupiters magnetosphereEnergetic
Particle Injections correlation to auroral
emissions
24 hour Galileo Energetic Particle Spectrogram
HST Image of Jupiters UV aurora
Mauk et al., 1997 1999, 2000
Auroral manifestation of near-Europa storm
dynamics
Extreme storm-time dynamics observed in the
vicinity of Europas orbit
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Interchange motion in the inner Jovian
magnetosphere
Particle transport of plasma and energetic
particles, changes in phase space density as
indicator of plasma processes in the system.
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Dynamics of the Jovian magnetotailenergetic
particle flow bursts
16 days
Ion anisotropy flow
radial
azimuthal
South-north magnetic field
Location 90-113 Rj
Krupp et al, 2004
Transient periodical disturbances with
repetition period of several days (the most
characteristic 2-3 days) are observed in the
Jovian magnetotail!
Magnetopause
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Plasma-moon interaction Discovery of the Europa
torus from charged and neutral particle
measurements
neutral density in the Europa-Torus from changes
in the pitch angle distributions of energetic
particles Galileo/EPD results. (Lagg et al.,
2001)
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Plasma-moon interactionsDetermination of the
neutral density in the Io-torus
neutral density in the Io-Torus from changes in
the pitch angle distributions of energetic
particles Galileo/EPD results. (Lagg et al.,
1998)
After Spencer Schneider 1996
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Possible Instrumentationsimilar to
Magnetospheric Imaging Instrument MIMI on
Cassinibut on rotating platform to get
measurements from all directions in space

• Ion and Neutral Camera
• 3 keV - 3 MeV ions and neutrals
• Charge-Energy-Mass spectrometer3 - 220 keV ions
• Low Energy Magnetospheric Measurement System30
  keV - 160 MeV ions15 keV - 5 MeV electrons