Research output: Contribution to Journal/Magazine › Journal article › peer-review
The thermal damping of an aerogel resonator in superfluid He-3-B at ultra low temperatures. / Bradley, D. Ian; Fisher, Shaun N.; Guénault, A.M. et al.
In: Journal of Low Temperature Physics, Vol. 138, No. 1-2, 01.2005, p. 123-128.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The thermal damping of an aerogel resonator in superfluid He-3-B at ultra low temperatures.
AU - Bradley, D. Ian
AU - Fisher, Shaun N.
AU - Guénault, A.M.
AU - Matthews, C. J.
AU - Skyba, P.
AU - Pickett, George R.
AU - Zaki, K. L.
PY - 2005/1
Y1 - 2005/1
N2 - 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.
AB - 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.
KW - superfluid
KW - helium-3
KW - aerogel
U2 - 10.1007/s10909-005-1537-3
DO - 10.1007/s10909-005-1537-3
M3 - Journal article
VL - 138
SP - 123
EP - 128
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 1-2
ER -