Metallic magnetic calorimeters (MMC): detectors for high-resolution X-ray spectroscopy
Metallic magnetic calorimeters (MMC): detectors for high-resolution X-ray spectroscopy
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DOI：
10.1016/j.nima.2003.11.212
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发表时间：
2004-03-11
影响因子：
1.4
通讯作者：
Seidel, GM
中科院分区：
文献类型：
--
作者：
Fleischmann, A;Link, M;Seidel, GM
基于磁量热法概念的X射线探测器非常适合高分辨率光谱学。金属磁量热计（MMC）使用金属顺磁温度传感器，该传感器与金属X射线吸收器紧密热接触。顺磁传感器放置在小磁场中。它的磁化被用来监测温度，而温度又与量热计的内能有关。高能量分辨率可以通过使用低噪声、高带宽的DC SQUID来测量吸收X射线时磁化的微小变化来获得。与最近的原型探测器的能量分辨率Δ E（半高宽）= 3.4 eV的X射线能量高达6.5千电子伏已经实现。我们讨论了一般的设计考虑，这种量热计的热力学性质，能量分辨率，和各种来源的噪声，这是在MMC中观察到的。(C)2003 Elsevier B.V.保留所有权利。
X-ray detectors based on the concept of magnetic calorimetry are well suited for high-resolution spectroscopy. Metallic magnetic calorimeters (MMC) make use of a metallic paramagnetic temperature sensor, which is in tight thermal contact with a metallic X-ray absorber. The paramagnetic sensor is placed in a small magnetic field. Its magnetization is used to monitor the temperature, which in turn is related to the internal energy of the calorimeter. High-energy resolution can be obtained by using a low-noise, high-bandwidth DC SQUID to measure the small change in magnetization upon the absorption of an X-ray. With recent prototype detectors an energy resolution of DeltaE(FWHM) = 3.4 eV for X-ray energies up to 6.5 keV has been achieved. We discuss general design considerations, the thermodynamic properties of such calorimeters, the energy resolution, and the various sources of noise, which are observed in MMCs. (C) 2003 Elsevier B.V. All rights reserved.