The GSFC Advanced Compton Telescope (ACT)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.
Document ID
19850040799
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hartman, R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Fichtel, C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kniffen, D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Trombka, J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Stacy, G. (NASA Goddard Space Flight Center Greenbelt; Maryland, University, College Park, MD, United States)