Suprathermal Ion Telescope (SIT)
GSFC, MPI for Solar System Research, University of Maryland

SIT is a time-of-flight ion mass spectrometer that measures elemental composition of He-Fe ions over the energy range ~30 keV/nucleon to 2 MeV/nucleon. The Field of View angles are 17X44 degrees, with the 44 deg angle in the ecliptic plane, centered ~60 deg from the spacecraft-Sun line to avoid sunlight while still intercepting insignificant numbers of Parker Spiral field controlled energetic ion fluxes The telescope analyzes ions that enter through thin entrance foils and stop in a solid state detector. A time-of-flight approach for determining the composition utilizes start and stop times obtained from secondary electrons entering a microchannel plate system. The MCP and SSD areas are each 6.0 cm2. The SIT geometric factor allows study of even small SEP events.

More images available on the Multimedia page

SWEA | STE | MAG | SEPT | SIT | LET | HET
Boom Suite | SEP Package