High Performance Heat Conductor with Small Spring Constant for Cryogenic Applications

Abstract

We developed a soft and high thermal conductive heat link for cryogenic applications. The measured maximum thermal conductivity was approximately 18500 W/m/K at 10 K. This spring constant was 1/43 of that of a single thick wire with the same cross-sectional area at room temperature. We realized these performances by utilizing high purity aluminum (99.9999 %, 6N) and by stranding many thin wires that are 0.15 mm in diameter. The electrical Residual Resistivity Ratio (RRR) was also measured and used to estimate the thermal conductivity by Wiedemann-Franz law. We observed the size effect on the electrical conductivity, and evaluated the effect of mechanical deformation to the RRR. These evaluations allow us to design a pragmatic heat link for cryogenic application.

arXiv comment13 pages, 6 figures

References in corpus (5)

• Detector configuration of KAGRA - the Japanese cryogenic gravitational-wave detector
• Internal thermal noise in the LIGO test masses : a direct approach
• Construction of KAGRA: an Underground Gravitational Wave Observatory
• Reduction of thermal fluctuations in a cryogenic laser interferometric gravitational wave detector
• A Study of Cooling Time Reduction of Interferometric Cryogenic Gravitational Wave Detectors Using a High-Emissivity Coating

Cited by in corpus (4)

• Cryogenic payloads for the Einstein Telescope -- Baseline design with heat extraction, suspension thermal noise modelling and sensitivity analyses
• A laser interferometer accelerometer for vibration sensitive cryogenic experiments
• Vibration Analysis of KAGRA Cryostat at Cryogenic Temperature
• Optical ultra-stable optical clock cavities as resonant mass gravitational wave detectors in search for new physics