Coupling between Solid 3He on Aerogel and Superfluid 3He in the Low Temperature Limit

Journal Article · Thu Sep 07 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2354684· OSTI ID:20884817

Bradley, D I; Fisher, S N; Guenault, A M; Haley, R P; Pickett, G R; Tsepelin, V; Whitehead, R C. V. ^[1]; Skyba, P ^[1]

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1. Department of Physics, Lancaster University, Lancaster, LA1 4YB (United Kingdom)

We have cooled liquid 3He contained in a 98% open aerogel sample surrounded by bulk superfluid 3He-B at zero pressure to below 120 {mu}K. The aerogel sample is placed in a quasiparticle blackbody radiator cooled by a Lancaster-style nuclear cooling stage to {approx}200 {mu}K. We monitor the temperature of the 3He inside the blackbody radiator using a vibrating wire resonator. We find that reducing the magnetic field on the aerogel sample causes substantial cooling of all the superfluid inside the blackbody radiator. We believe this is due to the demagnetization of the solid 3He layers on the aerogel strands. This system has potential for achieving extremely low temperatures in the confined fluid.

• OSTI ID: 20884817
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 850; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COOLING
DEMAGNETIZATION
GELS
HELIUM 3
IMPURITIES
LIQUIDS
MAGNETIC FIELDS
RESONATORS
SOLIDS
SUPERFLUIDITY
TEMPERATURE RANGE 0000-0013 K