The 20th International Conference on Low Temperature Detectors (LTD20)
Presentation Code : RP-036
Presentation Schedule: : July 27, 10:35 ~ 12:35

A vibration decoupling system for TES operation in the COSINUS dry dilution refrigerator

Moritz Kellermann1, The COSINUS Collaboration1,2,3,4,5,6,7,8,9
1Max Planck Institute for Physics, Germany, 2Atominstitut, Technische Universität Wien, Austria, 3Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, Italy, 4Gran Sasso Science Institute, Italy, 5Helsinki Institute of Physics, Finland, 6INFN - Laboratori Nazionali del Gran Sasso, Italy, 7INFN - Sezione di Roma, Italy, 8Institut für Hochenergiephysik der Österreichischen Akademie der Wissenschaften, Austria, 9SICCAS - Shanghai Institute of Ceramics, China

COSINUS will be among the first experiments to operate transition edge sensors (TESs) in a dry dilution refrigerator, measuring temperature changes of order micro-Kelvin. A pulse tube cooler is used to arrive at 3K, trading simplified handling without using liquid noble gases for an increased vibration noise level in the acoustic frequency range. As the signals measured with a TES are set in the same frequency region, it is necessary to decouple the detectors from all possible noise sources. In COSINUS, a two-stage passive decoupling system was developed and tested using piezo-based accelerometers. At the first stage, the refrigerator is mechanically isolated from all external noise sources. For the second stage, a spring-based system at the mixing chamber stage was developed. This contribution will focus on the design and test results of the decoupling system.

• Presentation Preference : Poster
• Topic : C. Instrumentations and Supporting Technologies
- 03. Refrigeration and Cryogenics
• Corresponding Author : Moritz Kellermann (Max Planck Institute for Physics)
• Presenter : Moritz Kellermann (Max Planck Institute for Physics)