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Proceedings Paper

ISGRI: a CdTe array imager for INTEGRAL
Author(s): Francois Lebrun; Claire Blondel; Irene Fondeur; Andrea Goldwurm; Phillipe Laurent; Jean Pierre Leray
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Paper 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.

Paper Details

Date Published: 18 October 1996
PDF: 11 pages
Proc. SPIE 2806, Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions, (18 October 1996); doi: 10.1117/12.253985
Show Author Affiliations
Francois Lebrun, CEA Saclay/SAP (France)
Claire Blondel, CEA Saclay/SAP (France)
Irene Fondeur, CEA Saclay/SAP (France)
Andrea Goldwurm, CEA Saclay/SAP (France)
Phillipe Laurent, CEA Saclay/SAP (France)
Jean Pierre Leray, CEA Saclay/SAP (France)

Published in SPIE Proceedings Vol. 2806:
Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions
Brian D. Ramsey; Thomas A. Parnell, Editor(s)

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