Hybrid gas scintillation proportional counter/phoswich detector for hard X-ray astronomy

Details Hybrid gas scintillation proportional counter/phoswich detector for hard X-ray astronomy Hybrid gas scintillation proportional counter/phoswich detector for hard X-ray astronomy

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1159..306g&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

2

Gas Detectors, Proportional Counters, Scintillation Counters, X Ray Astronomy, Background Noise, Balloon-Borne Instruments, Imaging Techniques, Optical Coupling, Position Sensing

Scientific paper

A concept is presented for a balloon-borne imaging hybrid proportional counter/phoswich detector of medium to hard X-rays. The phoswich would be optically coupled to the exit window of the proportional counter, and both detectors would use a common position-sensitive readout. It is anticipated that such a detector could combine the good energy and position resolution and excellent background rejection ability of the proportional counter for incident photon energies less than 100 keV with the extended response of the phoswich for higher energies. The phoswich could also be used to reject Compton scattering events in the proportional counter. This detector concept is studied using numerical simulations of a 400 sq cm square prototype detector. Results from this simulation indicate that current levels of proportional counter and phoswich performance are attainable at small cost in quantum efficiency, compared to a bare phoswich detector.

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