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- The Electrostatic Energy-Charge Analyzer (EECA) is the University of Maryland
experiment on the IMP-8 Satellite. It uses electrostatic deflection and total
energy measurements to determine the ionic charge and energy of particles in
the range of approximately 100 to 1000 keV/charge. A full description of the
instrument is at: http://imp8.umd.edu/imp-8-eeca_desc.html
This experiment was designed to determine the composition and energy spectra of
low-energy particles observed during solar flares and 27-d recurrent events.
The detectors used included (1) an electrostatic analyzer (to select particles
of the desired energy per charge) combined with an array of windowless
solid-state detectors (to measure the energy loss) and surrounded by an
anticoincidence shield, and (2) a thin-window proportional counter, solid-state
particle telescope. The experiment measured particle energies from 0.1 to 10
MeV per charge in 12 bands and uniquely identified positrons and electrons as
well as nuclei with charges of Z from 1 to 8 (no charge resolution for Z
greater than 8). Two 1000-channel pulse-height analyzers, one for each
detector, were included in the experiment payload.
For more information, see:
http://imp8.umd.edu/
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