Concept information
Preferred term
ICI
Definition
- The Ion Composition Instrument (ICI) on EQUATOR-S measures the 3D distribution functions of the major ion species, H+, He+, He++, and O+. It consists of a retarding-potential analyzer (RPA), followed by a toroidal energy-per-charge (E/q) analyzer with disc-shaped field of view, followed by a 20 kV post-acceleration into a time-of-flight (ToF) analysis section. Without RPA operation, the E/q range is 15 V to 40 kV, otherwise it starts at essentially zero volts. To accommodate the large dynamic range in ion fluxes, the instrument has split the 360¡ FoV into two 180¡ sections whose sensitivities differ by a factor 100. Moments of the distributions of all 4 ion species are computed on board and are available every 4 spins, i.e., every 6 s. The instrument is identical to the CODIF portion of the CIS instrument on CLUSTER. See: http://www.mpe-garching.mpg.de/EQS/eq-s-instruments.html (en)
Broader concept
- Particle Detectors (en)
URI
https://gcmd.earthdata.nasa.gov/kms/concept/c6015706-d663-4d06-ae76-c25af7fa83fe
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