12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > The thermal damping of an aerogel resonator in ...
View graph of relations

« Back

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

Research output: Contribution to journalJournal article

Published

Journal publication date01/2005
JournalJournal of Low Temperature Physics
Journal number1-2
Volume138
Number of pages6
Pages123-128
Original languageEnglish

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.