The GSFC Advanced Compton Telescope (ACT)

Details The GSFC Advanced Compton Telescope (ACT) The GSFC Advanced Compton Telescope (ACT)

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc....8...16h&link_type=abstract

IN: International Cosmic Ray Conference, 18th, Bangalore, India, August 22-September 3, 1983, Conference Papers. Volume 8 (A85-2

Computer Science

Balloon-Borne Instruments, Compton Effect, Gamma Ray Telescopes, Cosmic X Rays, Field Of View, Point Sources, Radiation Detectors, Sodium Iodides

Scientific paper

A new telescope is being developed at GSFC for the study of point sources of gamma rays in the energy range 1-30 MeV. Using the detection principle of a Compton scatter in a 2.5 cm thick NaI(Tl) detector followed by absorption in a 15 cm thick NaI(Tl) detector, the telescope uses a rocking collimator for field-of-view reduction and background subtraction. Background reduction techniques include lead-plastic scintillator shielding, pulse shape discrimination and Anger camera operation to both NaI detectors, as well as a time-of-flight measurement between them. The instrument configuration and status is described.

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