Measurement of thermal conductivity of the supports of CUORE cryostat

Year: 2008

Authors: Barucci M., Lolli L., Risegari L., Ventura G.

Autors Affiliation: Dipartimento di Fisica, Universita\’ di Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino, FI, Italy

Abstract: The CUORE cryogenic system consists of a large cryogen-free cryostat cooled by five pulse tubes and one high-power specially designed dilution refrigerator. About 5 × 103 kg of lead shielding are to be cooled to below 1 K and a mass of 1.5 × 103 kg must be cooled to 10 mK. Several tie-rods are used to support the different parts of the experiment. We have measured the thermal conductivity below 4 K of two candidate materials for the CUORE suspensions: the Ti6Al4V alloy (k (T) = 0.075 · T exp fenced(- 1.636 frac(4.38 K, T)) [W / m K]) and the 316LN stainless steel (k (T) = 0.0556 · T1.15 [W / m K]).

Journal/Review: CRYOGENICS (GUILDF.)

Volume: 48 (3-4)      Pages from: 166  to: 168

KeyWords: Cooling; Refrigerators; Stainless steel; Thermal conductivity; Titanium alloys, Cryogenic supports; CUORE cryostats; Pulse tubes, Cryostats
DOI: 10.1016/j.cryogenics.2008.03.018