CAPS Science Objectives Restated (Rev. 2/1/94)
 
CAPS Science Objectives
  1. MAGNETOSPHERE
    1. Solar wind and external magnetospheric boundaries.
      • Solar wind structure upstream of Saturn
      • Interplanetary pick-up ions
      • External boundary regions:
        • Foreshock, shock, magnetosheath
      • Structure and dynamics of boundary layers and solar wind plasma entry into the Kronian magnetosphere:
        • Low-latitude boundary layer (LLBL), mantle (?)
    2. Average global magnetospheric morphology.
      • Magnetic field configuration
      • Distribution of plasma composition, density, temperature, sources and sinks
      • Investigation of plasma domains and internal boundaries (principal domains to be listed here)
    3. Global magnetospheric dynamics.
      • Solar-wind-driven dynamics:
        • Solar-wind-driven convection, solar wind plasma input to the magnetosphere, relationship to auroral emissions and SKR
      • Rotationally-driven dynamics:
        • Dynamics of the corotation regions, plasma pick-up, plasma input to the magnetosphere from satellites and rings, radial transport of mass and angular momentum
      • Magnetotail dynamics, substorms, and their effects
    4. Magnetosphere/Ionosphere interactions
      • Investigation of the high-latitude magnetosphere and its interaction with Saturn's ionosphere and thermosphere
      • Auroral phenomena:
        • Field-aligned currents, auroral potential drops, particle acceleration, beams, conics, relationship to auroral emissions and SKR
      • Role of magnetosphere/ionosphere coupling in the maintenance of corotation
      • Plasma input to the magnetosphere from Saturn
    5. Magnetospheric Interaction with Titan.
      • Plasma input to the magnetosphere from Titan's atmosphere, exosphere, and neutral torus; ion pick-up
      • Injection of Titan ionospheric plasma into the magnetosphere: tail wind, detached plasma blobs, Titan plumes
      • Effects of Titan interaction on the magnetosphere: generation of a tail, Alfven wings, magnetic boundaries upstream of Titan in the magnetosphere and magnetosheath
    6. Magnetospheric interaction with icy satellites.
      • Plasma input to the magnetosphere form icy satellite surfaces: sputtering, ion pick-up from the neutral torus
      • Absorption and loss of trapped particles to satellites
      • Effects of satellite interaction on magnetospheric particle dynamics inside and around the satellite flux cube
    7. Magnetospheric interaction with the rings and dust.
      • Plasma input to the magnetosphere from rings, their atmosphere and ionosphere
      • Role of the magnetosphere in the transport of chemical species (water, etc.) between the rings and Saturn's atmosphere
      • Role of the magnetosphere in spoke formation and decay
      • Dust-plasma interactions
    8. Microphysical phenomena.
      • Wave-particle interactions and generation of Electrostatic and Electromagnetic emissions from free energy in particle distribution functions, flows, and gradients
      • Microphysics of the shock, foreshock, magnetosheath, relation to high-Mach-number interaction between the solar wind and magnetosphere
      • Reconnection signatures in the magnetopause and tail
      • SKR generation
      • Microphysics of ion pick-up and associated wave activity and thermalization processes
  2. TITAN
    1. Effects of magnetospheric interaction on Titan's upper atmosphere.
      • Ionization and heating by particle precipitation, role in N2 photolysis and aerosol formation
      • Loss of Titan's atmosphere by non-thermal processes
    2. Titan's ionosphere.
      • Particle precipitation as a source for Titan's ionosphere
      • Magnetization state of Titan's ionosphere
      • Effect of magnetospheric interaction on ionospheric flows
  3. SATURN
    1. Saturn's ionosphere.
      • Ionospheric diurnal variations and magnetic control
      • Sources and sinks of ionospheric plasma: ion inflow/outflow, particle precipitation
      • Ionospheric conductivities
    2. Saturn's thermosphere.
      • Effects of Joule heating and ionospheric drag on thermospheric dynamics and energetics
      • Heating by particle precipitation
  4. RINGS
    1. Interactions with the magnetosphere.
      • Role in spoke formation
      • Role in ring particle erosion
      • Dynamics of sub-micron-size particles
    2. Remote sensing of ring particle composition from analysis of sputtered ions or ionization of sputtered neutrals
  5. ICY SATELLITES
    1. Remote sensing of icy satellite surface composition from the analysis of sputtered ions and ions from neutral torus pick-up
    2. Mechanisms of surface modification: role of particle bombardment and direct magnetospheric interaction with surfaces