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Proceedings Paper

Development of a hybrid gas detector/phoswich for hard x-ray astronomy
Author(s): Marsha M. Pimperl; Brian D. Ramsey; Robert A. Austin; Takahisa Minamitani; Martin C. Weisskopf; Jonathan E. Grindlay; Kenneth S. K. Lum; Raj P. Manandhar
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Paper Abstract

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.

Paper Details

Date Published: 16 September 1994
PDF: 8 pages
Proc. SPIE 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, (16 September 1994); doi: 10.1117/12.186805
Show Author Affiliations
Marsha M. Pimperl, NASA Marshall Space Flight Ctr. (United States)
Brian D. Ramsey, NASA Marshall Space Flight Ctr. (United States)
Robert A. Austin, NASA Marshall Space Flight Ctr. (United States)
Takahisa Minamitani, NASA Marshall Space Flight Ctr. (Japan)
Martin C. Weisskopf, NASA Marshall Space Flight Ctr. (United States)
Jonathan E. Grindlay, Harvard College Observatory (United States)
Kenneth S. K. Lum, Harvard College Observatory (United States)
Raj P. Manandhar, Harvard College Observatory (United States)


Published in SPIE Proceedings Vol. 2280:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V
Oswald H. W. Siegmund; John V. Vallerga, Editor(s)

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