A high resolution gamma-ray spectrometer based on superconducting microcalorimeters
A high resolution gamma-ray spectrometer based on superconducting microcalorimeters
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DOI：
10.1063/1.4754630
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发表时间：
2012-09-01
影响因子：
1.6
通讯作者：
Ullom, J. N.
中科院分区：
文献类型：
--
作者：
Bennett, D. A.;Horansky, R. D.;Ullom, J. N.
超导体器件制造、探测器杂交技术和超导量子干涉器件读出技术的改进，使得基于过渡边缘传感器（TESs）的平方厘米大小的伽玛微热计阵列成为可能。在这些收集区域，伽马微量热计可以利用其前所未有的能量分辨率，在许多应用中进行光谱分析，这些应用受到紧密间隔的光谱峰的限制，例如，核材料的非破坏性分析。我们已经建立了一个256像素的光谱仪，在97 keV下平均全宽半最大能量分辨率为53 eV，可用动态范围超过400 keV，收集面积为5 cm(2)。我们演示了全256像素阵列的多路读出，其中236个像素（91%）提供光谱数据。这是迄今为止最大的TES微热计多路复用阵列。本文将回顾光谱仪，重点介绍仪器设计，探测器制造，读数，仪器操作和数据处理。此外，我们描述了最新的256像素阵列的特性和性能。(C) 2012年美国物理研究所。[http://dx.doi.org/10.1063/1.4754630]
Improvements in superconductor device fabrication, detector hybridization techniques, and superconducting quantum interference device readout have made square-centimeter-sized arrays of gammaray microcalorimeters, based on transition-edge sensors (TESs), possible. At these collecting areas, gamma microcalorimeters can utilize their unprecedented energy resolution to perform spectroscopy in a number of applications that are limited by closely-spaced spectral peaks, for example, the non-destructive analysis of nuclear materials. We have built a 256 pixel spectrometer with an average full-width-at-half-maximum energy resolution of 53 eV at 97 keV, a useable dynamic range above 400 keV, and a collecting area of 5 cm(2). We have demonstrated multiplexed readout of the full 256 pixel array with 236 of the pixels (91%) giving spectroscopic data. This is the largest multiplexed array of TES microcalorimeters to date. This paper will review the spectrometer, highlighting the instrument design, detector fabrication, readout, operation of the instrument, and data processing. Further, we describe the characterization and performance of the newest 256 pixel array. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4754630]