Quantum efficiency of the CCD camera (XIS) for the ASTRO-E mission
Quantum efficiency of the CCD camera (XIS) for the ASTRO-E mission
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DOI：
10.1016/s0168-9002(99)00600-2
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发表时间：
1999-10-21
影响因子：
1.4
通讯作者：
Kissel, S
中科院分区：
文献类型：
--
作者：
Katayama, H;Shouho, M;Kissel, S
我们测量了ASTRO-E卫星X射线CCD相机X射线成像光谱仪（XIS）的光学阻挡滤光片的光学和X射线透射率。我们得出结论，铝的氧化将光透射率降低到铝的理论值的60-70%。通过使用1200埃的铝厚度，我们在4000至9500埃的范围内实现了低于5 × 10（-5）的光透射率，而理论计算需要800埃。XIS的绝对量子效率的测量也在几个特定的能量下进行。我们确认了XIS工程模型（XIS EM）在0.5 keV下的20%量子效率。(C)1999 Elsevier Science B. V.保留所有权利。
We measured the optical and the X-ray transmission of the optical blocking filters for the X-ray Imaging Spectrometers (XISs) which are the X-ray CCD cameras of the ASTRO-E satellite. We conclude that the oxidation of the aluminum reduces the optical transmission down to similar to 60-70% of the theoretical value of the aluminum. We achieved optical transmission below 5 x 10(-5) in the range from 4000 to 9500 Angstrom by using aluminum thickness of 1200 Angstrom, while the theoretical calculation requires 800 Angstrom. The measurement of absolute quantum efficiency of XIS is also performed at several particular energies. We confirmed 20% quantum efficiency at 0.5 keV for the XIS engineering model (XIS EM). (C) 1999 Elsevier Science B.V. All rights reserved.