Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2010-11-15
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
12 Figures, 22 pages, Accepted for publication in Experimental Astronomy (in press)
Scientific paper
10.1007/s10686-010-9205-2
Phoswich detectors (RT-2/S & RT-2/G) are major scientific payloads of the RT-2 Experiment onboard the CORONAS-PHOTON mission, which was launched into a polar Low Earth Orbit of around 550 km on 2009 January 30. These RT-2 instruments are designed and developed to observe solar flares in hard X-rays and to understand the energy transport processes associated with these flares. Apart from this, these instruments are capable of observing Gamma Ray Bursts (GRBs) and Cosmic diffuse X-ray background (CDXRB). Both detectors consist of identical NaI(Tl) and CsI(Na) scintillation crystals in a Phoswich combination, having the same diameter (116 mm) but different thicknesses. The normal working energy range is from 15 keV to 150 keV, but may be extendable up to ~ 1 MeV. In this paper, we present the RT-2/S and RT-2/G instruments and discuss their testing and calibration results. We used different radio-active sources to calibrate both detectors. The radio-active source Co^57 (122 keV) is used for onboard calibration of both instruments. During its lifetime (~ 3-5 years), RT-2 is expected to cover the peak of the 24th solar cycle.
Chakrabarti Sandip K.
Debnath Dipak
Hingar M. K.
Kotoch Tilak B.
Madhav Vaibhav. P.
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