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


97% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Thermal transport by ballistic quasiparticles i...
View graph of relations

« Back

Thermal transport by ballistic quasiparticles in superfluid He-3-B in the low temperature limit.

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>7/09/2006
<mark>Journal</mark>AIP Conference Proceedings
Number of pages2
<mark>Original language</mark>English


In the temperature range below 0.2T(c), the gas of thermal excitations from the superfluid He-3-B ground state is in the ultra-dilute ballistic regime. Here we discuss preliminary measurements of the transport properties of this quasiparticle gas in a cell of cylindrical geometry with dimensions much smaller than any mean free path. The vertical cylinder, constructed from epoxy-coated paper, has vibrating wire resonator (VWR) heaters and thermometers at the top and bottom, and a small aperture at the top which provides the only exit for quasiparticles. Using the thermometer VWRs, we measure the difference in quasiparticle density between the top and bottom of the tube when we excite the top or bottom VWR heater. This gives information about the transport of energy along the cylindrical 3 He sample and hence about the scattering behaviour involved when a quasiparticle impinges on the cylinder wall.