The x-/gamma-ray camera ECLAIRs for the gamma-ray burst mission SVOM-猫眼课题宝

DOI：

10.1117/12.2055507

发表时间：

2014-06

期刊：

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其他

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作者：

O. Godet;G. Nasser;J. Atteia;B. Cordier;P. Mandrou;D. Barret;H. Triou;R. Pons;C. Amoros;S. Bordon;O. Gevin;F. Gonzalez;D. Gotz;A. Gros;B. Houret;C. Lachaud;K. Lacombe;W. Marty;K. Mercier;D. Rambaud;P. Ramon;G. Rouaix;S. Schanne;V. Waegebaert

我们介绍了ECLAIR，伽玛射线暴（GRB）触发相机飞行上的中法使命SVOM。ECLAIRs是一种宽视场（~ 2 sr）编码掩模相机，掩模透明度为40%，探测平面为1024 cm 2，耦合到数据处理单元（称为UGTS），该单元负责通过图像和速率触发在接近真实的时间内定位伽马射线暴。我们提出了仪器科学的要求，以及如何优化ECLAIR的设计，以提高其灵敏度，高红移伽玛暴和低光度伽玛暴在当地的宇宙，有一个低能量阈值为4千电子伏。总的光谱覆盖范围从4到150千电子伏。ECLAIR预计将在3年的标称使命内探测到约200个各种类型的伽马射线暴。为了达到4 keV的低能量阈值，ECLAIR的探测平面铺设有6400个4 × 4 mm 2和1 mm厚的肖特基CdTe探测器。探测器按32个分组，由低噪声ASIC读取8×4矩阵，形成称为XRDPIX的基本模块。在本文中，我们还介绍了我们目前的努力，调查这些模块的性能与他们的前端电子当带电粒子和/或光子使用放射源照射。所有测量都是在真空中不同的仪器配置中进行的，并且标称飞行中检测器温度为−20°C。这项工作将使我们能够选择飞行中的配置，这将是最好的折衷之间的科学性能和飞行中的可操作性的ECLAIR。我们将展示这项工作的一些亮点。

We present ECLAIRs, the Gamma-ray burst (GRB) trigger camera to fly on-board the Chinese-French mission SVOM. ECLAIRs is a wide-field (~ 2 sr) coded mask camera with a mask transparency of 40% and a 1024 cm2 detection plane coupled to a data processing unit, so-called UGTS, which is in charge of locating GRBs in near real time thanks to image and rate triggers. We present the instrument science requirements and how the design of ECLAIRs has been optimized to increase its sensitivity to high-redshift GRBs and low-luminosity GRBs in the local Universe, by having a low-energy threshold of 4 keV. The total spectral coverage ranges from 4 to 150 keV. ECLAIRs is expected to detect ~ 200 GRBs of all types during the nominal 3 year mission lifetime. To reach a 4 keV low-energy threshold, the ECLAIRs detection plane is paved with 6400 4 × 4 mm2 and 1 mm-thick Schottky CdTe detectors. The detectors are grouped by 32, in 8×4 matrices read by a low-noise ASIC, forming elementary modules called XRDPIX. In this paper, we also present our current efforts to investigate the performance of these modules with their front-end electronics when illuminated by charged particles and/or photons using radioactive sources. All measurements are made in different instrument configurations in vacuum and with a nominal in-flight detector temperature of −20°C. This work will enable us to choose the in-flight configuration that will make the best compromise between the science performance and the in-flight operability of ECLAIRs. We will show some highlights of this work.

The x-/gamma-ray camera ECLAIRs for the gamma-ray burst mission SVOM

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