A Vibration Decoupling System for TES Operation in the COSINUS Dry Dilution Refrigerator

IF 1.1 3区 物理与天体物理 Q4 PHYSICS, APPLIED
M. Kellermann, G. Angloher, M. R. Bharadawj, M. Cababie, I. Dafinei, N. Di Marco, L. Einfalt, F. Ferroni, S. Fichtinger, A. Filipponi, T. Frank, M. Friedl, Z. Ge, M. Heikinheimo, M. N. Hughes, K. Huitu, R. Maji, M. Mancuso, L. Pagnanini, F. Petricca, S. Pirro, F. Pröbst, G. Profeta, A. Puiu, F. Reindl, K. Schäffner, J. Schieck, D. Schmiedmayer, P. Schreiner, C. Schwertner, M. Stahlberg, A. Stendahl, M. J. Stukel, C. Tresca, F. Wagner, S. Yue, V. Zema, Y. Zhu
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Abstract

COSINUS will be among the first underground experiments to operate Transition Edge Sensors in a dry dilution refrigerator, measuring temperature changes on the order of \(\mu\)K. A pulse tube cryocooler is used to cool down to 3K, trading simplified handling, by not using liquid noble gases, for an increased vibration noise level in the acoustic frequency range. As the signals measured with a TES are in the same frequency region, it is necessary to decouple the detectors from all possible noise sources. In COSINUS, a two-level passive decoupling system was developed and tested using piezo-based accelerometers. At the first level, the refrigerator is mechanically isolated from all external noise sources. For the second level an internal spring-based system was developed and tested on a mockup system. On the first level a reduction of the vibrational background up to a factor 4 below 10 Hz could be measured. On the second level a resonance frequency of 1.2 Hz with damping of higher frequencies was achieved.

Abstract Image

用于 COSINUS 干法稀释冰箱中 TES 运行的振动去耦系统
COSINUS将是第一批在干稀释冰箱中运行过渡边缘传感器的地下实验之一,测量的温度变化量级为\(\mu\)K。使用脉冲管低温冷却器将温度降到 3K,不使用液态惰性气体,从而简化了操作,但声频范围内的振动噪声水平却增加了。由于使用 TES 测量的信号处于同一频率区域,因此有必要将探测器与所有可能的噪声源去耦。COSINUS 利用压电式加速度计开发并测试了两级无源去耦系统。在第一级,冰箱与所有外部噪声源进行了机械隔离。在第二层,开发了一个基于内部弹簧的系统,并在模拟系统上进行了测试。在第一层,可以测量到低于 10 赫兹的振动背景降低了 4 倍。在第二层,共振频率为 1.2 Hz,对较高频率有阻尼作用。
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来源期刊
Journal of Low Temperature Physics
Journal of Low Temperature Physics 物理-物理:凝聚态物理
CiteScore
3.30
自引率
25.00%
发文量
245
审稿时长
1 months
期刊介绍: The Journal of Low Temperature Physics publishes original papers and review articles on all areas of low temperature physics and cryogenics, including theoretical and experimental contributions. Subject areas include: Quantum solids, liquids and gases; Superfluidity; Superconductivity; Condensed matter physics; Experimental techniques; The Journal encourages the submission of Rapid Communications and Special Issues.
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