Vibration isolation with high thermal conductance for a cryogen-free dilution refrigerator
Autor: | F. M. Buters, Dirk Bouwmeester, Harmen van der Meer, Gert Koning, Kier Heeck, Martin de Wit, H. J. Eerkens, Gesa Welker, Tjerk H. Oosterkamp |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
010302 applied physics
Cryostat Physics - Instrumentation and Detectors Cantilever Materials science Condensed Matter - Mesoscale and Nanoscale Physics business.industry Bandwidth (signal processing) FOS: Physical sciences Applied Physics (physics.app-ph) Instrumentation and Detectors (physics.ins-det) Physics - Applied Physics 01 natural sciences 010305 fluids & plasmas Vibration Resonator Vibration isolation Thermal conductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Optoelectronics Dilution refrigerator business Instrumentation |
Zdroj: | Review of Scientific Instruments, 90, 015112 |
Popis: | We present the design and implementation of a mechanical low-pass filter vibration isolation used to reduce the vibrational noise in a cryogen-free dilution refrigerator operated at 10 mK, intended for scanning probe techniques. We discuss the design guidelines necessary to meet the competing requirements of having a low mechanical stiffness in combination with a high thermal conductance. We demonstrate the effectiveness of our approach by measuring the vibrational noise levels of an ultrasoft mechanical resonator positioned above a superconducting quantum interference device. Starting from a cryostat base temperature of 8 mK, the vibration isolation can be cooled to 10.5 mK, with a cooling power of 113 µW at 100 mK. We use the low vibrations and low temperature to demonstrate an effective cantilever temperature of less than 20 mK. This results in a force sensitivity of less than 500 zN/Hz and an integrated frequency noise as low as 0.4 mHz in a 1 Hz measurement bandwidth. |
Databáze: | OpenAIRE |
Externí odkaz: |