Instrumental background of the x-ray CCD camera in space: its dependence on the configuration parameters of CCD
Instrumental background of the x-ray CCD camera in space: its dependence on the configuration parameters of CCD
复制标题
太空X射线CCD相机的仪器背景：其对CCD配置参数的依赖性
DOI：
10.1117/12.788138
复制
发表时间：
2008
影响因子：
1.8
通讯作者：
H. Murakami
中科院分区：
文献类型：
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作者：
T. Anada;T. Dotani;M. Ozaki;H. Murakami
通过蒙特-卡罗模拟，研究了空间环境下CCD结构参数（像素尺寸和耗尽层厚度）对X射线CCD相机仪器本底的影响。X射线探测器通常不仅对X射线敏感，而且对带电粒子敏感。后者产生与X射线难以区分的伪信号，称为仪器背景。降低仪器本底对于X射线源的观测是至关重要的，但是低本底一直没有被认为是X射线CCD相机的设计目标。我们利用蒙特-卡罗模拟器，它可以成功地再现朱雀XIS的背景，目前的分析。我们发现，较厚的耗尽层倾向于增加背景，除了背照式CCD的>5 keV带。另一方面，像素大小的依赖性是不同的正面和背面照明的CCD。这些结果被解释在宇宙/X射线与CCD的相互作用方面。
We studied how the configuration parameters of a CCD (pixel size and depletion layer thickness) affect the instrumental background of an X-ray CCD camera in the space environment through the Monte-Carlo simulation. X-ray detectors are in general sensitive not only to X-rays but also to charged particles. The latter produce pseudo-signal indistinguishable from that of X-rays, which is called instrumental background. It is essential to reduce the instrumental background for the observations of dim and diffuse X-ray sources, but the low background was not considered as a design goal of an X-ray CCD camera so far. We utilized the Monte-Carlo simulator, which could successfully reproduce the Suzaku XIS background, for the current analysis. We found that thicker depletion layer tends to increase the background except for the >5 keV band of the backside-illuminated CCD. On the other hand, pixel-size dependence was different between the frontside and backside illuminated CCDs. These results are interpreted in terms of the interaction of cosmic/X-rays with the CCD.
蒙特卡罗模拟研究空间X射线CCD相机仪器背景的起源
DOI：
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发表时间：
2006
期刊：
Proceeding of SPIE 6266
影响因子：
--
作者：
H.Murakami;et al.
通讯作者：
et al.
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