A Coded Aperture Gamma Ray Telescope
A gamma ray telescope is being developed to operate in the energy range 100 keV to 5 MeV utilizing coded aperture imaging. The design incorporates a mask pattern based on a Uniformly Redundant Array (URA), which has been shown to have ideal imaging characteristics. A mask-anti-mask procedure is used to eliminate the effects of any possible systematic variations in detector background rates. The detector array is composed of 35 elements of the high-Z material Bismuth Germanate (BGO). Results of laboratory testing of the imaging properties will be presented. A southern hemisphere balloon flight is planned for 1982 with the goal of observing the 0.511 MeV radiation from the Galactic Center. Computer calculations show that a point source of this radiation can be located to within + 10.
IEEE Transactions on Nuclear Science
M.L. McConnell, D.J. Forrest, E.L. Chupp, and P.P. Dunphy, A CODED APERTURE GAMMA RAY TELESCOPE, 1982, IEEE Trans. Nucl. Sci., NS-29, 155.