Development of a hybrid gas detector/phoswich for hard x-ray astronomy

Details Development of a hybrid gas detector/phoswich for hard x-ray astronomy Development of a hybrid gas detector/phoswich for hard x-ray astronomy

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2280..119p&link_type=abstract

Proc. SPIE Vol. 2280, p. 119-126, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, Oswald H. Siegmund; John V. Vallerg

Astronomy and Astrophysics

Astronomy

1

Scientific paper

A hybrid detector is under development for use as a balloon-borne instrument in hard x-ray astronomy. The detector provides broad band coverage by coupling an optical avalanche chamber to a phoswich. The optical avalanche chamber yields superior instrument response at low energies while the scintillator takes over at the higher energies where the gas becomes transparent: at 25 keV, the addition of the gas chamber improves the energy resolution by a factor of 2.5 and the spatial resolution by a factor of 10 as compared to the stand-alone response of the phoswich. A half-scale prototype instrument is being constructed for test purposes and to help resolve a number of design questions involving the coupling of the two components.

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