High sensitivity high resolution double scatter 1-30 MeV gamma ray telescope

Details High sensitivity high resolution double scatter 1-30 MeV gamma ray telescope High sensitivity high resolution double scatter 1-30 MeV gamma ray telescope

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc....9..343z&link_type=abstract

IN: International Cosmic Ray Conference, 18th, Bangalore, India, August 22-September 3, 1983, Late Papers. Volume 9 (A85-22801 0

Computer Science

Performance

Gamma Ray Astronomy, Gamma Ray Telescopes, High Resolution, Performance Tests, Scintillation, Sensitivity, Systems Engineering

Scientific paper

The design and performance of the double-scatter 1-30-MeV gamma-ray telescope developed at the University of California for balloon-borne observations are reported and illustrated with drawings, diagrams, and graphs. The telescope comprises an upper array of 16 6.03 x 6.03 x 100-cm plastic scintillator bars viewed by photomultiplier tubes (PMTs) at both ends, a lower array (at 100-cm distance) of 16 4.83 x 4.83 x 100-cm NaI(Tl) bars viewed at both ends by PMTs, and four 122 x 122 x 0.64-cm plastic sheets viewed by four PMTs each as charged-particle anticoincidence shielding. The operating principle of the telescope, the tests conducted on the NaI(Tl) bars, the on-board data-processing electronics, and the overall performance are characterized. Performance parameters include area 1 sq m, field of view pi sr, 4-sigma sensitivity above 1 MeV 0.00004 gamma/sq cm sec over 25 h, angular resolution about 3.5 deg FWHM, and energy resolution 10 percent at 1 MeV and 6 percent at 6 MeV.

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