ISGRI: a CdTe array imager for INTEGRAL

Francois Lebrun; Claire Blondel; Irene Fondeur; Andrea Goldwurm; Phillipe Laurent; Jean Pierre Leray

doi:10.1117/12.253985

18 October 1996 ISGRI: a CdTe array imager for INTEGRAL

Francois Lebrun, Claire Blondel, Irene Fondeur, Andrea Goldwurm, Phillipe Laurent, Jean Pierre Leray

Proceedings Volume 2806, Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions; (1996) https://doi.org/10.1117/12.253985
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

The INTEGRAL soft gamma-ray imager (ISGRI) is a large and thin CdTe array. Operating at room temperature, this gamma camera covers the lower part (below 200 keV) of the energy domain (20 keV - 10 MeV) of the imager on board the INTEGRAL Satellite (IBIS). The ASIC's front-end electronics features particularly a low noise preamplifier, allowing a threshold below 20 keV and a pulse rise-time measurement which permits a charge loss correction. The charge loss correction and its performances are presented as well as the results of various studies on CdTe thermal behavior and radiation hardness. At higher energy (above 200 keV) ISGRI will operate in conjunction with PICsIT, the IBIS CsI gamma camera. A selection among the events in coincidence performed on the basis of the Compton scattering properties reduces strongly the background. This allows an improvement of the sensitivity and permits short term imaging and spectral studies (high energy pulsars) which otherwise would not have fit within the IBIS telemetry allocation.

Citation Download Citation

Francois Lebrun, Claire Blondel, Irene Fondeur, Andrea Goldwurm, Phillipe Laurent, and Jean Pierre Leray "ISGRI: a CdTe array imager for INTEGRAL", Proc. SPIE 2806, Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions, (18 October 1996); https://doi.org/10.1117/12.253985

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