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The thermal damping of an aerogel resonator in superfluid He-3-B at ultra low temperatures.

Bradley, D. Ian and Fisher, Shaun N. and Guénault, A.M. and Matthews, C. J. and Skyba, P. and Pickett, George R. and Zaki, K. L. (2005) The thermal damping of an aerogel resonator in superfluid He-3-B at ultra low temperatures. Journal of Low Temperature Physics, 138 (1-2). pp. 123-128. ISSN 0022-2291

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Abstract

We present measurements of the thermal damping of a cylindrical aerogel sample oscillating in superfluid He-3-B in the low temperature regime. The measurements are made at low pressures where the He-3 confined in the aerogel is normal. As in the case of conventional vibrating Wire resonators, the thermal damping arises from quasiparticle collisions at the wire surface and is enhanced by many orders of magnitude by Andreev scattering from the superfluid backflow around the resonator. However, in the case of aerogel, incoming quasiparticles must be absorbed and thermalised within the aerogel before being re-emitted.

Item Type: Article
Journal or Publication Title: Journal of Low Temperature Physics
Uncontrolled Keywords: superfluid ; helium-3 ; aerogel
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23558
Deposited By: Dr Richard P. Haley
Deposited On: 03 Feb 2009 14:55
Refereed?: Yes
Published?: Published
Last Modified: 17 Jul 2013 10:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23558

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