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Instrument: EPIC : Energetic Particle and Ion Composition (Geotail) |
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Associated Platforms GEOTAIL Related Data Sets View all records related to this instrument Description The principal objective of the EPIC (Energetic Particle and Ion Composition) investigation on Geotail is to explore the distant magnetotail region and obtain information on the origin, transport, storage, acceleration and dynamics of suprathermal and non-thermal particle populations. The instrument performs three-dimensional distribution measurements by using both total energy, E/Q and time of flight (STICS -- Supra-Thermal Ion Composition Spectrometer) and Velocity/Energy (ICS -- Ion Composition Subsystem) detectors. These measure Ions >8 keV/charge and Ions/Electrons >35 keV, respectively. Composition measurements are made by using a thin foil time-of-flight technique which resolves the H and He isotopes, and provides elemental resolution up to approximately argon. The instrument also measures the non-thermal components to 6 MeV for protons, 480 keV for electrons, and 400 keV/nucleon for ions with Z>2. Directional measurements with a time resolution <3 s are possible. Principal Investigator: Richard McEntire Applied Physics Lab, Johns Hopkins University John Hopkins Road Laurel, MD 20723-6099 Phone: 240-228-5410 Fax: e-mail: Dick.McEntire@jhuap1.edu See: http://pwg.gsfc.nasa.gov/geotail_inst.shtml and http://sd-www.jhuapl.edu/Geotail/ Online Resources http://sd-www.jhuapl.edu/Geotail/ http://pwg.gsfc.nasa.gov/geotail_inst.shtml#EPIC Instrument Logistics Data Rate: 2.56 kbps Instrument Start Date: 1992-07-24 Instrument Owner: Johns Hopkins University Applied Physics Lab |
