High performance thermal link with small spring constant for cryogenic applications

Tomohiro Yamada, Takayuki Tomaru, Toshikazu Suzuki, Takafumi Ushiba, Nobuhiro Kimura, Suguru Takada, Yuki Inoue, Takaaki Kajita

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We developed a soft and high thermal conductive thermal 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 reached these performances by utilizing high purity aluminum (99.9999%, 6 N) and by stranding many thin wires that are 0.15 mm in diameter. The electrical Residual Resistivity Ratio was also measured and used to estimate the thermal conductivity by the 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 thermal link for cryogenic application.

Original languageEnglish
Article number103280
StatePublished - Jun 2021


  • Cryogenic
  • Cryogenic gravitational wave detector
  • Mechanical deformation
  • Pure aluminum
  • RRR
  • Size effect
  • Spring constant
  • Thermal conductivity


Dive into the research topics of 'High performance thermal link with small spring constant for cryogenic applications'. Together they form a unique fingerprint.

Cite this