Imaging gas scintillation proportional counters for ASTRO-D

Takaya Ohashi; Kazuo Makishima; Manabu Ishida; Takeshi G. Tsuru; Makoto Tashiro; Teruyoshi Mihara; Yoshiki Kohmura; Hiroyuki Inoue

doi:10.1117/12.48322

1 October 1991 Imaging gas scintillation proportional counters for ASTRO-D

Takaya Ohashi, Kazuo Makishima, Manabu Ishida, Takeshi G. Tsuru, Makoto Tashiro, Teruyoshi Mihara, Yoshiki Kohmura, Hiroyuki Inoue

Author Affiliations +

Proceedings Volume 1549, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II; (1991) https://doi.org/10.1117/12.48322
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The design and performance of imaging gas scintillation proportional counters (IGSPCs) developed for ASTRO-D are described. The 10 micrometers beryllium window has enabled the x- ray sensitivity down to 0.7 keV for a sealed-off gas counter, and a position-sensitive phototube equipped with multiwire anode gives good imaging capability. The laboratory model of the IGSPC shows an energy resolution 8% FWHM at 6 keV and a position resolution 0.5 mm FWHM with an effective area of 50 mm diameter. The onboard data system incorporating a 16-bit microprocessor efficiently discriminates the room background down to the order of magnitude of 3 X 10-4 cm-2 s-1 keV-1, similar to that achieved by the Ginga LAC instrument. These performances make the GIS experiment a very powerful focal plane instrument for ASTRO-D.

Citation Download Citation

Takaya Ohashi, Kazuo Makishima, Manabu Ishida, Takeshi G. Tsuru, Makoto Tashiro, Teruyoshi Mihara, Yoshiki Kohmura, and Hiroyuki Inoue "Imaging gas scintillation proportional counters for ASTRO-D", Proc. SPIE 1549, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II, (1 October 1991); https://doi.org/10.1117/12.48322

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