ISGRI: a CdTe array imager for INTEGRAL
ISGRI: a CdTe array imager for INTEGRAL
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ISGRI：INTEGRAL 的 CdTe 阵列成像仪
DOI：
10.1117/12.253985
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
J. Leray
中科院分区：
文献类型：
--
作者：
F. Lebrun;C. Blondel;Irene Fondeur;A. Goldwurm;P. Laurent;J. Leray
INTEGRAL软伽马射线成像仪（ISGRI）是一个大而薄的碲化镉阵列。在室温下工作，该伽玛相机覆盖了积分卫星（IBIS）上成像仪能量域（20 keV - 10 MeV）的较低部分（低于200 keV）。ASIC的前端电子功能特别具有低噪声前置放大器，允许低于20 keV的阈值和脉冲上升时间测量，允许电荷损失校正。介绍了电荷损耗校正方法及其性能，以及对碲化镉热行为和辐射硬度的各种研究结果。在更高的能量（200 keV以上）下，ISGRI将与PICsIT （IBIS CsI伽马相机）一起工作。在康普顿散射特性的基础上对符合的事件进行选择，大大降低了背景。这可以提高灵敏度，并允许短期成像和光谱研究（高能脉冲星），否则这些研究将不适合IBIS遥测分配。
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.