Line profile modelling for multi-pixel CZT detectors

T. Chattopadhyay; S. V. Vadawale; A. R. Rao; D. Bhattacharya; Mithun N. P. S.; V. Bhalerao

doi:10.1117/12.2234805

18 July 2016 Line profile modelling for multi-pixel CZT detectors

T. Chattopadhyay, S. V. Vadawale, A. R. Rao, D. Bhattacharya, Mithun N. P. S., V. Bhalerao

Proceedings Volume 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray; 99054D (2016) https://doi.org/10.1117/12.2234805
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Cadmium Zinc Telluride (CZT) detectors have been the mainstay for hard X-ray astronomy for its high quantum efficiency, fine energy resolution, near room temperature operation, and radiation hardness. In order to fully utilize the spectroscopic capabilities of CZT detectors, it is important to generate accurate response matrix, which in turn requires precise modelling of the line profiles for the CZT detectors. We have developed a numerical model taking into account the mobility and lifetime of the charge carriers and intrpixel charge sharing for the CZT detectors. This paper describes the details of the modelling along with the experimental measurements of mobility, lifetime and charge sharing fractions for the CZT detector modules of thickness of 5 mm and 2.5 mm pixel size procured from Orbotech Medical Solutions (same modules used in AstroSat-CZTI).

Citation Download Citation

T. Chattopadhyay, S. V. Vadawale, A. R. Rao, D. Bhattacharya, Mithun N. P. S., and V. Bhalerao "Line profile modelling for multi-pixel CZT detectors", Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99054D (18 July 2016); https://doi.org/10.1117/12.2234805

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