A high sensitivity phoswich scintillator X-ray telescope for hard X-ray (20-120 keV) astronomy from balloon platform

Damle, S. V. ; Kothare, A. T. ; Kunte, P. K. ; Malkar, J. P. ; Naranan, S. ; Sreekantan, B. V. ; Venkatesan, D. (1987) A high sensitivity phoswich scintillator X-ray telescope for hard X-ray (20-120 keV) astronomy from balloon platform Advances in Space Research, 7 (7). pp. 115-119. ISSN 0273-1177

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0273-1177(87)90020-2

Abstract

A large area (400 cm2) low background X-ray telescope consisting of four collimated NaI/CsI scintillator phoswich detectors (each 100 cm2) was built and successfully flown several times during 1980-1984. The phoswich configuration enables one to eliminate X-ray background produced by high energy atmospheric and cosmic gamma-rays. Combined with large area, small field of view (5° × 5°) and large exposure time that was possible due to an on-board telescope pointing programmer, for the 20 - 120 Kev energy range, 3σ sensitivity achieved was 5 × 10-6 photon/cm2 sec Kev for exposure time of 104 sec at observational altitude of 4 g/cm2. The Instrument characteristics, relevant details on pointing system, detector system, associated electronics and telemetry and in-flight performance in 1983 and 1984 are presented.

Item Type:Article
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