The design, implementation, and performance of the Atro-H SXS calorimeter array and anti-coincidence detector
The design, implementation, and performance of the Atro-H SXS calorimeter array and anti-coincidence detector
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Atro-H SXS 量热器阵列和反符合探测器的设计、实现和性能
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Junping Zhao
中科院分区：
文献类型：
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作者：
C. Kilbourne;J. Adams;R. Brekosky;J. Chervenak;M. Chiao;M. Eckart;E. Figueroa;M. Galeazzi;C. Grein;C. Jhabvala;R. Kelley;D. Kelly;M. Leutenegger;D. McCammon;F. Porter;A. Szymkowiak;Tomomi Watanabe;Junping Zhao
JAXA Astro-H（更名为Hitomi）软x射线光谱仪（SXS）的量热计阵列旨在为空间扩展的宇宙x射线源和6 keV左右Fe-K波段的所有宇宙x射线源提供前所未有的光谱分辨率，从而实现必要的等离子体诊断。SXS在焦平面上有一个由36个微热计组成的方形阵列。这些量热计由离子注入硅热敏电阻器和高温热化x射线吸收器组成。当散热器温度为50 mK时，这些器件在6 keV下的分辨率优于4.5 eV。我们将讨论该阵列的基本物理参数，包括阵列布局，与散热器连接的热导率，电阻函数，吸收器细节以及将吸收器连接到热敏电阻承载元件的方法。我们还将介绍整个阵列的热特性，包括热导率和串扰测量，以及通过α粒子、热脉冲和环境背景对框架温度进行脉冲的结果。硅电离探测器位于量热计阵列后面，用于拒绝宇宙射线引起的事件。我们将简要描述这种反巧合检测器及其性能。
The calorimeter array of the JAXA Astro-H (renamed Hitomi) Soft X-ray Spectrometer (SXS) was designed to provide unprecedented spectral resolution of spatially extended cosmic x-ray sources and of all cosmic x-ray sources in the Fe-K band around 6 keV, enabling essential plasma diagnostics. The SXS has a square array of 36 microcalorimeters at the focal plane. These calorimeters consist of ion-implanted silicon thermistors and HgTe thermalizing x-ray absorbers. These devices have demonstrated a resolution of better than 4.5 eV at 6 keV when operated at a heat-sink temperature of 50 mK. We will discuss the basic physical parameters of this array, including the array layout, thermal conductance of the link to the heat sink, resistance function, absorber details, and means of attaching the absorber to the thermistorbearing element. We will also present the thermal characterization of the whole array, including thermal conductance and crosstalk measurements and the results of pulsing the frame temperature via alpha particles, heat pulses, and the environmental background. A silicon ionization detector is located behind the calorimeter array and serves to reject events due to cosmic rays. We will briefly describe this anti-coincidence detector and its performance.