Development of a 32-detector CdTe matrix for the SVOM ECLAIRs x/gamma camera: tests results of first flight models
| Autor: | K. Lacombe, K. Mercier, P. Ramon, M. Galliano, C. Amoros, Marc Billot, J.-P. Dezalay, B. Cordier, J. L. Atteia, B. Houret, O. Godet, V. Waegebaert, Ph. Guillemot, S. Bordon, Kévin Aubaret, R. Pons, Olivier Limousin, O. Gevin, F. Gonzalez, Damien Rambaud, S. Delaigue, G. Nasser |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
business.industry Radioactive source Detector Schottky diode 01 natural sciences law.invention 010309 optics Full width at half maximum Optics Application-specific integrated circuit law visual_art 0103 physical sciences visual_art.visual_art_medium Optoelectronics Ceramic business 010303 astronomy & astrophysics Leakage (electronics) Gamma camera |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2233558 |
| Popis: | ECLAIRs, a 2-D coded-mask imaging camera on-board the Sino-French SVOM space missi on, will detect and locate gamma-ray bursts in near real time in the 4 - 150 keV energy band in a large field of view. The design of ECLAIRs has been driven by the objective to reach an unprecedented low-energy threshold of 4 keV. The detection plane is an assembly of 6400 Schottky CdTe detectors of size 4x4x1 mm 3 , biased from -200V to -500V and operated at -20°C. The low-energy threshold is achieved thanks to an innovative hybrid module composed of a thick film ceramic holding 32 CdTe detectors ("Detectors Ceramics"), associated to an HTCC ceramic housing a low-noise 32-channel ASIC ("ASIC Ceramics"). We manage the coupling between Detectors Ceramics and ASIC Ceramics in order to achieve the best performance and ensure the unifor mity of the detection plane. In this paper, we describe the complete hybrid XRDPIX, of which 50 flight models have been manufactured by the SAGEM company. Afterwards, we show test results obtained on Detectors Ceramics, on ASIC Ceramics and on the modules once assembled. Then, we compare and confront detectors leakage currents and ASIC ENC with the energy threshold values and FWHM measured on XRDPIX modules at the temperature of -20°C by using a calibrated radioactive source of 241Am. Finally, we study the homogeneity of the spectral properties of the 32-detector hybrid matrices and we conclude on general performance of more than 1000 detection channels which may reach the low-energy threshold of 4 keV required for the future ECLAIRs space camera. |
| Databáze: | OpenAIRE |
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