A large area imaging gas scintillation proportional counter for use in X-ray astronomy

Details A large area imaging gas scintillation proportional counter for use in X-ray astronomy A large area imaging gas scintillation proportional counter for use in X-ray astronomy

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984spie..445..384k&link_type=abstract

IN: Instrumentation in astronomy V; Proceedings of the Fifth Meeting, London, England, September 7-9, 1983 (A85-25360 10-89). Be

Astronomy and Astrophysics

Astronomy

Gas Discharge Tubes, Proportional Counters, Scintillation Counters, X Ray Imagery, Energy Spectra, Gas Ionization, Spectral Resolution, Xenon

Scientific paper

A large area (200 sq cm), broad bandwidth (0.1-70 keV), imaging gas scintillation proportional counter (IGSPC) has been constructed for use in X-ray astronomy. The IGSPC consists of a high pressure xenon gas scintillation proportional counter (GSPC) coupled to a multi-wire proportional counter (MWPC) via a calcium fluoride window. THe MWPC, filled with a mixture of argon, methane, and tetrakis (dimethylamino) ethylene, detects the UV photons emitted by the xenon gas in the GSPC. The detector has a measured energy resolution of 8.0 percent (FWHM) and 4.3 percent (FWHM) at 5.9 keV and 22.1 keV, respectively. The predicted spatial resolution of the detector is less than 1 mm (FWHM) between 3-22 keV and 37-60 keV. A method to determine the three-dimensional location of detected X-rays is described. In addition, a combination of discrimination schemes designed to reduce the non-X-ray background in the IGSPC by more than two orders of magnitude is discussed.

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