Propagation of thermal excitations in a cluster of vortices in superfluid 3He-B

Abstract

We describe the first measurement on Andreev scattering of thermal excitations from a vortex configuration with known density, spatial extent, and orientations in 3He-B superfluid. The heat flow from a blackbody radiator in equilibrium rotation at constant angular velocity is measured with two quartz tuning fork oscillators. One oscillator creates a controllable density of excitations at 0.2Tc base temperature and the other records the thermal response. The results are compared to numerical calculations of ballistic propagation of thermal quasiparticles through a cluster of rectilinear vortices.

6 pages, 4 figures

References in corpus (4)

• Emergence of turbulence in an oscillating Bose-Einstein condensate
• Velocity Statistics Distinguish Quantum Turbulence from Classical Turbulence
• Interaction of ballistic quasiparticles and vortex configurations in superfluid He3-B
• Ballistic propagation of thermal excitations near a vortex in superfluid He3-B

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