Characterization of the Astro-E2 X-ray spectrometer
Characterization of the Astro-E2 X-ray spectrometer
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Astro-E2 X 射线光谱仪的表征
DOI：
10.1016/j.nima.2003.11.269
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发表时间：
2004
影响因子：
1.4
通讯作者：
W. Tillotson
中科院分区：
文献类型：
--
作者：
J. Cottam;K. Boyce;G. Brown;E. Figueroa;R. Kelley;V. Ponce;F. Porter;C. Stahle;W. Tillotson
我们展示了 X 射线光谱仪 (XRS) 的广泛表征测试的结果，该光谱仪将于 2005 年作为 Astro-E2 任务的一部分发射。 XRS 将利用新开发的 32 像素二维微量热计阵列，在 0.3–10keV 的能量范围内提供~6eV 的分辨率。探测器的特征在于能量尺度和能量分辨率，两者都随着设计和操作参数的变化而变化。我们已经在一系列操作参数（包括偏置电压、温度和入射光子通量）上校准了增益规模和能量分辨率。我们将展示累积探测器阵列的响应以及单个像素均匀性的测量。一个像素在物理上偏离阵列，并且将被飞行中的放射源持续照射。我们将展示该像素可用于监控焦平面阵列变化的准确性。最后，我们用高能连续光源照射阵列并测量汞吸收边缘，以表征像素的吸收效率。
We present the results of extensive characterization tests of the X-ray Spectrometer (XRS), which will be launched in 2005 as part of the Astro-E2 mission. The XRS will utilize a newly developed 2-D microcalorimeter array of 32 pixels that will provide a resolution of ∼6eV over the energy range 0.3–10keV. The detector is characterized by the energy scale and energy resolution, both of which vary with design and operating parameters. We have calibrated the gain scale and energy resolution over a range of operating parameters including bias voltage, temperature, and incident photon flux. We will present the response of the cumulative detector array as well as a measure of the uniformity of the individual pixels. One pixel is physically offset from the array and will be continuously illuminated by a radioactive source in-flight. We will show the accuracy with which this pixel can be used to monitor variations in the focal plane array. Finally, we have illuminated the array with a high-energy continuum source and measured the Hg absorption edges in order to characterize the absorption efficiency of the pixels.