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

Marsha M. Pimperl; Brian D. Ramsey; Robert A. Austin; Takahisa Minamitani; Martin C. Weisskopf; Jonathan E. Grindlay; Kenneth S. K. Lum; Raj P. Manandhar

doi:10.1117/12.186805

16 September 1994 Development of a hybrid gas detector/phoswich for hard x-ray astronomy

Marsha M. Pimperl, Brian D. Ramsey, Robert A. Austin, Takahisa Minamitani, Martin C. Weisskopf, Jonathan E. Grindlay, Kenneth S. K. Lum, Raj P. Manandhar

Author Affiliations +

Proceedings Volume 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V; (1994) https://doi.org/10.1117/12.186805
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

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Marsha M. Pimperl, Brian D. Ramsey, Robert A. Austin, Takahisa Minamitani, Martin C. Weisskopf, Jonathan E. Grindlay, Kenneth S. K. Lum, and Raj P. Manandhar "Development of a hybrid gas detector/phoswich for hard x-ray astronomy", Proc. SPIE 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, (16 September 1994); https://doi.org/10.1117/12.186805

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