Measurement of steady state heat transfer in a bath of sub-cooled superfluid helium

Abstract

This paper reports a study of the peak and recovery heat flux densities (qP and qR) in a bath of subcooled superfluid helium (He lip). A RhFe wire (d=51 mu m, L=34.8 mm) was horizontally immersed in a He IIp cryostat, which served as sample, heater and temperature sensor. For steady state measurement a programmed voltage method with a triangle waveform of 20 s was applied. The measured qP and qR values cover the temperature range 1.81-2.1 K at a pressure of 0.1 MPa.