7 citations · 10 across the 5 of their papers we have counts for
5 papers
Breakdown of Potential Flow to Turbulence around a Sphere Oscillating in Superfluid He-4 above the Critical Velocity
W. Schoepe, R. Hänninen, M. Niemetz
The onset of turbulent flow around an oscillating sphere in superfluid He is known to occur at a critical velocity where is the circulation quantum and…
On the Statistical Analysis of Single Vortex Nucleation Events in Superfluid He-4
M. Niemetz, W. Schoepe
We investigate the statistical properties of single phase slip events observed in vortex nucleation experiments in He-4 by the groups in Berkeley and Paris. From the cumulative dis…
Intermittent Switching between Potential Flow and Turbulence in Superfluid Helium at mK Temperatures
Michael Niemetz, Hubert Kerscher, Wilfried Schoepe
Superfluid flow around an oscillating microsphere is investigated at temperatures down to 25 mK. Stable laminar flow below a critical velocity and turbulence at large drives are fo…
Vortex motion in superconducting YBCO inferred from the damping of the oscillations of a levitating magnetic microsphere
R. Grosser, P. Hoecherl, A. Martin +2
The damping of the oscillations of a small permanent magnet (spherical shape, radius 0.1 mm) levitating between two parallel YBCO surfaces is measured as a function of oscillation…
Detecting flux creep in superconducting YBCO thin films via damping of the oscillations of a levitating permanent magnet
R. Grosser, A. Martin, M. Niemetz +2
The damping of the oscillations of a small permanent magnet (spherical shape, radius 0.1 mm) levitating between two parallel epitaxial YBCO films is measured as a function of oscil…