Temperature Effect on Detectors Performance of the SVOM ECLAIRs X/Gamma Camera

ECLAIRs, a 2-D coded-mask imaging camera on-board the Sino-French SVOM space mission, will detect and locate Gamma-ray bursts (GRBs) in near real time in the 4×150 keV energy band. The design of ECLAIRs is driven by the objective of a 4 keV low-energy threshold. The detection plane is an assembly of...

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Bibliographic Details
Main Authors: Lacombe, K., Amoros, C., Belkacem, I., Dezalay, J.-P, Houret, B., Pons, R., Ramon, P., Waegebaert, V.
Format: Conference Proceeding
Language:English
Subjects:
Cadmium compounds
Cameras
CdTe
Detector
Detectors
II-VI semiconductor materials
Instruments
Prototypes
Space mission
SVOM mission
Temperature effects
Temperature measurement
the ECLAIRs camera
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Summary:ECLAIRs, a 2-D coded-mask imaging camera on-board the Sino-French SVOM space mission, will detect and locate Gamma-ray bursts (GRBs) in near real time in the 4×150 keV energy band. The design of ECLAIRs is driven by the objective of a 4 keV low-energy threshold. The detection plane is an assembly of 6400 Schottky CdTe detectors organized on elementary modules of 4×8 pixels, biased up to -450V and nominally operated at -20°C. In this paper, we describe these modules and the test benches used for their study. We show spectral measurements made at temperatures from -12°C to -36°C in a vacuum chamber thanks to a radioactive source ( 241 Am). Because of temperature fluctuations on the detection plane, we analyze and conclude on temperature effects on performance criteria such as the gain, the low energy threshold, the line FWHM.
ISSN:2168-9229
DOI:10.1109/ICSENS.2018.8589858