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SupraThermal And Thermal Ion Composition (STATIC)

NSSDCA ID: 2013-063A-03

Mission Name: Mars Atmosphere and Volatile EvolutioN (MAVEN)
Principal Investigator:Dr. James P. McFadden


The SupraThermal And Thermal Ion Composition (STATIC) instrument is designed to characterize ions escaping from the martian atmosphere and the processes of escape, to determine the composition of thermal to energetic ions, and the energy distributions and pitch angle variations. The objectives are to measure ionospheric ions from 0.1 to 10 eV, tail superthermal ions from 5 - 100 eV, and pick-up ions from 100 - 20000 eV, with particular emphasis on the positive ions of H, O, O2, and CO2. STATIC is a toroidal electrostatic analyzer with a time-of-flight section.

The instrument consists of an analyzer/deflector, which selects the ions by energy, a 15 kV accelerator, and a series of carbon foils (densities from 0.5 to 1.1 microgram per square cm) backed by a microchannel plate detector. Ions penetrating the first foil, designated "start", produce electrons which are accelerated and deflected to the microchannel plate (MCP). The next foil ("stop") is 2 cm away, ions penetrating this foil produce electrons which are accelerated by 10 kV through the third foil ("thick") to the MCP. The thick foil captures any protons that have penetrated the stop foil. All MCP events are recorded and stored by a digital interface board. STATIC can cover a mass range of 1 - 70 amu, flow velocities from <1 to >25 km/s, and an energy range from 1 eV to 30 keV. Mounted on the articulating payload platform, its field of view is 360 x 90 degrees.

Image courtesy NASA/SSL

Alternate Names


      Additional Information

      Questions and comments about this experiment can be directed to: Dr. David R. Williams



      NameRoleOriginal AffiliationE-mail
      Dr. James P. McFaddenLead InvestigatorUniversity of California,
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