The X-ray Quantum Calorimeter Sounding Rocket Experiment: Improvements for the Next Flight
The X-ray Quantum Calorimeter Sounding Rocket Experiment: Improvements for the Next Flight
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X 射线量子热量计探空火箭实验：下次飞行的改进
DOI：
10.1007/s10909-008-9734-5
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发表时间：
2008
影响因子：
2
通讯作者：
A. Szymkowiak
中科院分区：
文献类型：
--
作者：
D. McCammon;K. Barger;D. Brandl;R. Brekosky;S. Crowder;J. Gygax;R. Kelley;C. Kilbourne;M. Lindeman;F. Porter;L. Rocks;A. Szymkowiak
我们已经开发了一种新的量热计阵列，以增加我们的收集面积的四倍。该6×6像素设备的总面积为144 mm 2，使其成为迄今为止最大的X射线微量热仪阵列之一。由0.7 μm HgTe层支撑在15 μm高纯硅上的相对薄的高Z吸收体在高达1.5 keV的光子能量下提供良好的效率。这种复合材料的热容足够低，当在50 mK的基础温度下工作时，在2 mm×2 mm像素上获得了1.6eV FWHM的能量分辨率。红外阻隔滤光片也得到了改进。在2 μm ~ 2cm范围内，室温辐射必须衰减约9个数量级，以避免光子散粒噪声占探测器噪声的主导地位。要做到这一点，同时保持对只能穿透几μg cm− 2的非常软的X射线的高透射率，是所有观察外部目标的软X射线量热计的共同问题。我们正在构建单片硅两层支撑网格，在5 mm间距的背衬层上具有350 μm间距的前层。这些器件具有98%的开放性，在60°视场范围内具有>95%的有效透射率，同时为38 mm直径的滤光片提供强大的支持，该滤光片由20 nm的铝和50 nm的聚酰亚胺组成。其中五个串联的滤光片提供了必要的红外衰减。集成除冰加热器是离子注入在细网，以消除污染，必要时。
We have developed a new calorimeter array to increase our collecting area by a factor of four. The 6×6 pixel device has a total area of 144 mm2, making it one of the largest X-ray microcalorimeter arrays yet constructed. A relatively thin high-z absorber consisting of a 0.7 μm HgTe layer supported on 15 μm high-purity silicon provides good efficiency up to photon energies of 1.5 keV. The heat capacity of this composite is low enough to obtain an energy resolution of ∼6 eV FWHM on the 2 mm×2 mm pixels when operated at a base temperature of 50 mK. The infrared blocking filters have also been improved. Room temperature radiation must be attenuated by about 9 orders of magnitude between 2 μm and 2 cm to avoid having photon shot noise dominate the detectornoise. Accomplishing this while maintaining a high transmission for very soft X-rays that can penetrate only a few μg cm−2is a problem common to all soft X-ray calorimeters that observe external targets. We are constructing monolithic silicon two-layer support meshes with a 350 μm pitch front layer on a 5 mm pitch backing layer. These are 98% open and have >95% effective transmission over a 60° field of view, while providing robust support for 38 mm diameter filters consisting of 20 nm of aluminum on 50 nm of polyimide. Five of these filters in series provide the necessary infrared attenuation. Integral deicing heaters are ion implanted in the fine mesh to remove contamination when necessary.
影响因子：
2.3
作者：
K. Mitsuda;M. Bautz;Hajime Inoue;Rich Kelley;K. Koyama;H. Kunieda;K. Makishima;Y. Ogawara;
通讯作者：
K. Mitsuda;M. Bautz;Hajime Inoue;Rich Kelley;K. Koyama;H. Kunieda;K. Makishima;Y. Ogawara;