2019/11/08 by D. Schmoranzer, Schmoranzer, David, Kumar, Sumit +14
Engineering · Physics and Astronomy · #Advanced Thermodynamic Systems and Engines #Advanced Thermodynamics and Statistical Mechanics #Applied Physics (physics.app-ph) #FOS: Physical sciences #Heat Transfer and Optimization #Instrumentation and Detectors (physics.ins-det) #Superconducting and THz Device Technology #Thermal Radiation and Cooling Technologies
paper · pdf · doi:10.48550/arxiv.1911.03160
openalex publication_date 2019/11/08 · openalex created_date 2023/01/02 · openalex updated_date 2026/07/28
Cryogen-free dilution refrigerators generally simplify low temperature research but some types of samples, including superconducting qubits and other nanoelectronic devices, are affected by environmental heat sources such as stray photons or residual helium. We present the design and performance of a hermetic cell installed on the mixing chamber plate of a cryogen-free dilution refrigerator. The performance was quantified by measuring the dependence of the resonance frequency of a mechanical oscillator installed inside the cell on the mixing chamber temperature down to 10 mK. We found the expected logarithmic temperature dependence of the resonance frequency down to the lowest temperatures, demonstrating that the efficiency of the hermetic shield is significantly better than that of a simpler shield with no visible gaps.