Observations on the Escape of Negative Ions from Pressurized, Turbulent He II

Abstract

Data on the capture and escape of negative ions in turbulent He II are reported for various pressures. The results are consistent with a revised version of Vinen's dimensional theory and previous experimental results on rotating He II. A model for vortex annihilation is developed which allows the turbulence theory to be expressed in terms of a single dimensionless constant which we measure.