Energy Range
∼ 30 MeV – 5 GeV
Effective Area
50 cm2 at 400 MeV
Energy Resolution
∼40% at 150 MeV (FWHM)
The Gamma-Ray Telescope consisted of a magnetic-core, wire-matrix, spark chamber, triggered by a three-element scintillation counter telescope. A plastic scintillator guard counter surrounding these two units served as an anti-coincidence detector to reject triggers due to incident charged particles and allow only gamma-rays to be detected. Beneath the telescope was an energy calorimeter, which absorbed the secondary particles produced by the incident photons.
