Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1159...81h&link_type=abstract
IN: EUV, X-ray, and gamma-ray instrumentation for astronomy and atomic physics; Proceedings of the Meeting, San Diego, CA, Aug.
Astronomy and Astrophysics
Astronomy
Gamma Ray Astronomy, Photon Absorptiometry, Scintillation Counters, Spaceborne Telescopes, Photodiodes, Photon Beams, Photon Density, Radiation Counters
Scientific paper
A gamma-ray detector system, originally designed for the GRASP gamma-ray telescope satellite, is being developed. It has the ability to determine the position of a single photon interaction in one plane to an accuracy of 15 mm, and with a precision of less than 20 mm FWHM in the third dimension. The total sensitive area of the GRASP detector is 1859 sq cm. The detector comprises an array of separate position-sensitive bars fabricated from CsI(Tl) scintillator. The scintillation photons are detected at either end of the bars by large-area PIN photodiodes coupled to low-noise VLSI electronics. Analysis of the two photodiodes signals allows the position along the bar and the size of the energy deposit from a photon interaction to be determined.
Bussini A.
Byard Kevin
Dean Anthony J.
Goldwurm Andréa
Hall Jeffrey Clifton
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