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Laboratory for Atmospheric and Space Physics

Suprathermal and Thermal Ion Composition (STATIC)

The STATIC instrument will enable measurement of energetic particles in the Martian atmosphere. (Courtesy NASA/SSL)

The STATIC instrument will enable measurement of energetic particles in the Martian atmosphere. (Courtesy NASA/SSL)


The Suprathermal and Thermal Ion Composition (STATIC) instrument is part of the Particles and Fields (P & F) Package and measures thermal ions to moderate energy escaping ions.

Goals:

  • Measure the source ion populations near periapsis, the heated ionospheric ions at intermediate altitudes that achieve escape velocity, and the pickup acceleration of these ions in the magnetosheath and solar wind
  • Allow direct measurements of the Martian sheath plasma, separating shocked solar wind and planetary ions that populate the sheath and plasma sheet

Observations:

  • Escaping ions and processes
  • Composition of thermal to energetic ions; energy distributions and pitch angle variations
  • Ionospheric Ions 0.1-10 eV
  • Tail Superthermal ions (5-100eV)
  • Pick-up Ions (100-20,000 eV)
  • Key ions H+, O+, O2+, CO2+
  • MAVEN will measure the drivers, reservoirs, and escape rates to determine the present state of Mars' upper atmosphere and allow determination of the net integrated loss to space through time. (Courtesy MAVEN)

    MAVEN will measure the drivers, reservoirs, and escape rates to determine the present state of Mars’ upper atmosphere and allow determination of the net integrated loss to space through time. (Courtesy MAVEN)

Technical details and heritage:

  • Toroidal Electrostatic Analyzer with Time of Flight section
  • Mass Range 1-70 AMU, ΔM/M > 4
  • Energy range ~0.1 eV to 30 keV, ΔE/E~15%
  • FOV 360o X 90o
  • Angular Resolution 22.5o x 6o
  • Energy Flux < 104 to 109 eV/cm2-s-sr-eV (to 1012 w/attenuators for low energy beam)
  • Can be oriented to measure either upwelling/downwelling or horizontal flows
  • Heritage from Cluster CODIF

Jim McFadden—STATIC Instrument Lead

Jim McFadden—STATIC Instrument Lead


The STATIC instrument lead is Jim McFadden (SSL). For more about McFadden, visit: http://bit.ly/jpmbio.

 

 

 

 

 


MAVEN Science Community Workshop Presentation
(Dec. 2, 2012)
STATIC presentation (4.9 MB PDF)

STATIC presentation
(4.9 MB PDF)