MC 2 - 1K, a New 1024-Pixel CdTe Hybrid Detector for Space Science

Résumé fourni par la source

This paper presents the design, the fabrication and the performance characterization of a new hybrid detector based on CdTe Schottky pixel detectors bump bonded on the 2D ASIC IDeF-X$\mathrm{D}^{2} \mathrm{R}_{2}$with a full-custom interconnect room-temperature process. The pixels are$250 \mu ~\mathrm{m}$pitch and contain each a full spectroscopic channel up to a peak detector to read the matrix with a triggered logic. First spectral tests were performed in full frame readout mode with 32 rows read out in parallel and column data multiplexed one by one towards the OWB-1 ADC ASIC. The first prototype shows a yield of pixel interconnects greater than 98.5 %. Analysing the aggregated spectrum over all pixels, we measured an energy resolution of 0.8 keV FWHM at 59.54 keV at room temperature. Spectral characterization tests based on single and multiple events will be presented on the two first samples. Perspectives for new large-size fine-pitch imaging spectrometers for hard X-ray astrophysics will be addressed.

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