Charge-Energy-Mass Spectrometer(CHEM)

Description

The instrument consisted of an entrance collimator and electrostatic analyzer section followed by a time-of-flight and total-energy-measurement section floating at a 30 kV acceleration potential. The energy range covered was from 1 to 300 keV/Q, with a geometric factor of 2.E-3 sq cm-sr and 32-sector angular resolution. Energy resolution was 5 to 18%, and all charge states and isotopes of H and He, the charge states of Li, and the major elements and charge states up to and including Fe were resolved. For more details, see G. Gloeckler et al., IEEE Transactions on Geoscience and Remote Sensing, v. GE-23, p. 234, 1985.