Metallic magnetic calorimeters
Metallic magnetic calorimeters
复制标题
金属磁性量热计
DOI：
10.1063/1.3292407
复制
发表时间：
2009
影响因子：
2
通讯作者：
G. Seidel
中科院分区：
文献类型：
--
作者：
A. Fleischmann;L. Gastaldo;S. Kempf;A. Kirsch;A. Pabinger;C. Pies;J. Porst;P. Ranitzsch;S. Schäfer;F. Seggern;Thomas Wolf;C. Enss;G. Seidel
金属磁量热计（MMC）是量热粒子探测器，通常在低于100 mK的温度下工作，它利用顺磁温度传感器将探测器中粒子吸收时的温升转换为dc-SQUID中可测量的磁通量变化。在过去的几年中，越来越多的团队开始开发MMC，用于各种各样的应用，从加速分子碎片的空间分辨检测的α，β和γ光谱到高分辨率X射线探测器阵列。对于能量高达6 keV的X射线，已证明能量分辨率为2.7 eV（FWHM），我们预计下一代设备可以将其推到1 eV以下。我们给出了一个介绍MMC的物理和总结目前使用的读出方案，以及通常观察到的噪声贡献和它们对能量分辨率的影响。我们讨论一般的设计考虑，MMC的微制造和微制造设备的性能。在这一领域取得了很大的进展，在过去的几年里，大多数材料的热力学性质接近体积值，允许最佳和可预测的性能。
Metallic magnetic calorimeters (MMC) are calorimetric particle detectors, typically operated at temperatures below 100 mK, that make use of a paramagnetic temperature sensor to transform the temperature rise upon the absorption of a particle in the detector into a measurable magnetic flux change in a dc‐SQUID. During the last years a growing number of groups has started to develop MMC for a wide variety of applications, ranging from alpha‐, beta‐ and gamma‐spectrometry over the spatially resolved detection of accelerated molecule fragments to arrays of high resolution x‐ray detectors. For x‐rays with energies up to 6 keV an energy resolution of 2.7 eV (FWHM) has been demonstrated and we expect that this can be pushed below 1 eV with the next generation of devices. We give an introduction to the physics of MMCs and summarize the presently used readout schemes as well as the typically observed noise contributions and their impact on the energy resolution. We discuss general design considerations, the micro‐fabrication of MMCs and the performance of micro‐fabricated devices. In this field large progress has been achieved in the last years and the thermodynamic properties of most materials approach bulk values allowing for optimal and predictable performance.