29 September 2004 Performance of a gas scintillation proportional counter array for a high-energy x-ray observatory
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Abstract
A focal plane array of high-pressure gas scintillation proportional counters (GSPC) for a High Energy X-Ray Observatory (HERO) has been developed at the Marshall Space Flight Center. The array consists of eight GSPCs and is a part of balloon-born payload scheduled to fly in May 2004. These detectors have an active area of ~ 20 cm2 each, and are filled with a high pressure (106 Pa) xenon-helium mixture. Imaging is via crossed-grid position-sensitive phototubes sensitive in the UV region. The performance of the GSPC is well matched to that of the telescope’s x-ray optics which have response to 75 keV and a focal spot size of ~ 0.5 mm. The detector’s energy resolution, 5.0% FWHM at 60 keV, is adequate for resolving the broad spectral lines of astrophysical importance and for accurate continuum measurements. Results of the ground detector array testing are presented.
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Mikhail V. Gubarev, Mikhail V. Gubarev, Brian Ramsey, Brian Ramsey, Jeffery Apple, Jeffery Apple, } "Performance of a gas scintillation proportional counter array for a high-energy x-ray observatory", Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); doi: 10.1117/12.552122; https://doi.org/10.1117/12.552122
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