Towards Energy-Dispersive Particle Detection with sub-eV Energy Resolution: Metallic Magnetic Calorimeters with Direct Sensor Readout

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI:10.1109/ISEC46533.2019.8990913

M. Krantz, A. Fleischmann, C. Enss, S. Kempf

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引用次数: 2

Abstract

Metallic magnetic calorimeters are energy-dispersive cryogenic particle detectors providing an excellent energy resolution, a fast signal rise time, a high quantum efficiency as well as an almost ideal linear detector response. To surpass the present record resolution of 1.6 eV (FWHM) for 6 keV photons, we have started to develop integrated detectors for which the paramagnetic temperature sensor monitoring the temperature rise of the detector is integrated directly into the pickup loop of the superconducting quantum interference device. Due to the greatly enhanced magnetic flux coupling and consequently the reduced contribution of SQUID noise to the overall noise spectrum, this kind of devices should push the resolution to a value well below 1 eV. Here, we discuss the design and performance of a prototype 64 pixels metallic magnetic calorimeter based detector array with integrated detectors that rely on first-order parallel gradiometric SQUIDs with two meander-shaped pickup coils onto which planar temperature sensor made of Ag:Er are deposited.

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亚ev能量分辨率的能量色散粒子探测:具有直接传感器读出的金属磁量热计

金属磁量热计是能量色散低温粒子探测器，具有优异的能量分辨率，快速的信号上升时间，高量子效率以及几乎理想的线性探测器响应。为了超越目前记录的6 keV光子的1.6 eV (FWHM)分辨率，我们已经开始开发集成探测器，将监测探测器温升的顺磁温度传感器直接集成到超导量子干涉器件的拾取回路中。由于磁通量耦合大大增强，从而降低了SQUID噪声对整体噪声谱的贡献，这种器件应将分辨率推至远低于1 eV的值。在这里，我们讨论了基于64像素金属磁量热计的探测器阵列的原型设计和性能，该阵列具有集成探测器，依赖于具有两个弯曲形状拾取线圈的一阶平行梯度squid，其上沉积了由Ag:Er制成的平面温度传感器。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE International Superconductive Electronics Conference (ISEC)

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