The CZT X-ray Imager on AXO |
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| Authors: | C Budtz-Jørgensen I Kuvvetli NJ Westergaard P Jonasson V Reglero C Eyles T Neubert |
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| Institution: | (1) Danish Space Research Institute, Juliane Maries Vej 30, Copenhagen, Denmark;(2) University of Valencia, Valencia, Spain;(3) University of Birmingham, Birmingham, UK;(4) Danish Meteoroligical Institute, Lynbyvej 100, Copenhagen, Denmark |
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| Abstract: | DSRI has initiated a development program of CZT X-ray and gamma raydetectors employing strip readout techniques. A dramatic improvement ofthe energy response was found operating the detectors as so-called driftdetectors. For the electronic readout, modern ASIC chips wereinvestigated. Modular design and the low power electronics will make largearea detectors using the drift strip method feasible. The performance of aprototype CZT system will be presented and discussed. One such detector system has been proposed for future space missions: TheX-Ray Imager (XRI) on the Atmospheric X-ray Observatory (AXO), whichis a mission proposed to the Danish Small Satellite Program and is dedicatedto observations of X-ray generating processes in the Earth's atmosphere. Ofspecial interest will be simultaneous optical and X-ray observations of spritesthat are flashes appearing directly above an active thunderstorm system.Additional objective is a detailed mapping of the auroral X-ray and opticalemission. XRI comprises a coded mask and a 20 cm × 40 cm CZTdetector array covering an energy range from 5 to 200 keV. |
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