Author/Authors :
Limousin، نويسنده , , O and Blondel، نويسنده , , C and Bonnin، نويسنده , , C and Crétolle، نويسنده , , J and Goldwurm، نويسنده , , A and Horeau، نويسنده , , B and Laurent، نويسنده , , P and Lebrun، نويسنده , , F and Leray، نويسنده , , J.P، نويسنده ,
Abstract :
A new generation of large area semiconductor based γ-ray camera for astrophysics space application has been developed through the γ-ray IBIS (Imager on Board INTEGRAL Satellite) telescope program, on board the ESA INTEGRAL satellite. This instrument features a coded-mask aperture imaging system, active and passive shields and two detector arrays. The first one (ISGRI : INTEGRAL Soft Gamma-Ray Imager) is made of 16384 CdTe detectors (4×4 mm large, 2 mm thick) operating at room temperature and will operate between 15 keV and 1 MeV. The second detector array (PICsIT : Pixelated CsI Telescope) is made of 4096 CsI scintillators (9.2×9.2 mm large, 30 mm high) coupled to silicon PIN photodiodes working between 150 keV and 10 MeV. IBIS combine broad band energy, spectroscopic capabilities and high spatial resolution imaging (12 arcmin) over a wide field of view (∼20°×20°, 50% sensitivity). A “flight-like” model of the detectors has been built, integrated and successfully tested. After a description of the IBIS imaging principle, we will report results obtained with the qualification model of the ISGRI camera.
