High Resolution X-Ray Spectroscopy Using Microcalorimeters
High Resolution X-Ray Spectroscopy Using Microcalorimeters
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使用微热量计进行高分辨率 X 射线光谱分析
DOI：
10.1117/12.948718
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
M. Skinner
中科院分区：
文献类型：
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作者：
R. Kelley;S. Holt;G. Madejski;S. Moseley;R. Schoelkopf;A. Szymkowiak;D. McCammon;B. Edwards;M. Juda;M. Skinner
在过去的几年里，已经证明了使用微量热计进行高分辨率、高量子效率、非色散X射线光谱分析。在此期间，在1-10千电子伏波段的能量分辨率已从-140 eV（FWHM）的值，相当于最好的固态（Si/Li）探测器，提高到-17 eV的值。我们目前正致力于通过设计在热容、热导率、X射线吸收材料、热敏电阻几何形状和热敏电阻注入浓度方面进行优化的设备来提高能量分辨率。此外，我们一直致力于设计一个集成的光谱仪组成的氦4低温恒温器包含一个绝热退磁冰箱，非X射线阻挡过滤器和控制和信号处理电子。威斯康星州大学已经组装了这种系统的基本组成部分，戈达德大学正在研制一种类似的系统。这些系统将证明这种方法用于空间飞行的可行性，特别是用于美国航天局AXAF使命，并作为X射线量热法进一步工作的研究工具。本文介绍了X射线量热法的概况，介绍了目前正在进行的X射线测试的结果，并讨论了一种建立X射线量热谱仪的方法。
The use of microcalorimeters for high-resolution, high quantum efficiency, non-dispersive X-ray spectroscopy has been demonstrated over the past few years. During this time the energy resolution in the 1-10 keV band has improved from a value of-140 eV (FWHM), comparable to the best solid-state (Si/Li) detectors, to a value of-17 eV. We are presently working on improving the energy resolution by designing devices that have been optimized with respect to heat capacity, thermal conductance, X-ray absorbing material, thermistor geometry and thermistor implant concentration. In addition we have been working on the design of an integrated spectrometer consisting of a He4 cryostat containing an adiabatic demagnetization refrigerator, non-X-ray blocking filters and control and signal processing electronics. The essential components for such a system have been assembled at the University of Wisconsin and a similar system is being developed at Goddard. These systems will demonstrate the feasibility of this approach for space flight use, in particular for the NASA AXAF mission, and serve as research tools for further work in X-ray calorimetry. In this paper we give an overview of X-ray calorimetry, present the results of on-going X-ray tests, and discuss an approach for building an X-ray calorimeter spectrometer.