Hybrid gas detector/phoswich for hard x-ray astronomy

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

doi:10.1117/12.162821

19 November 1993 Hybrid gas detector/phoswich for hard x-ray astronomy

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 2006, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IV; (1993) https://doi.org/10.1117/12.162821
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

A hybrid detector, which combines an optical avalanche chamber with a phoswich, is currently under development. The optical avalanche chamber--a proportional counter designed to give large quantities of light photons during charge multiplication, mounts on the front of the scintillator and gives response at low energies, while the solid scintillator takes over at energies where the gas becomes transparent (> 90 keV). Both sections of the hybrid will be read out by a common set of photomultipliers under the phoswich. The addition of the gas section to the phoswich improves the energy resolution of the instrument by a factor of 2.5 at 25 keV and the spatial resolution by a factor of 10 at the same energy. The net result is an instrument with broad band coverage and high sensitivity which will be used for coded aperture imaging on long duration balloon flights.

Citation Download Citation

Brian D. Ramsey, Robert A. Austin, Takahisa Minamitani, Martin C. Weisskopf, Jonathan E. Grindlay, Kenneth S. K. Lum, and Raj P. Manandhar "Hybrid gas detector/phoswich for hard x-ray astronomy", Proc. SPIE 2006, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IV, (19 November 1993); https://doi.org/10.1117/12.162821

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