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- Title
Experiments on a High Quality Grid Oscillating in Superfluid <sup>4</sup>He at Very Low Temperatures.
- Authors
Deepak Garg; M. Giltrow; P. McClintock; L. Skrbek; W. Vinen
- Abstract
Abstract  We have investigated a copper-mesh grid oscillating at its fundamental (0, 1) Bessel mode in superfluid 4He for temperatures 10TP=5 bar. The high quality factor (Qâ¼105) of the oscillator allowed us to observe new features of its response to a periodic drive which, at the lowest T, was found to depend on the prehistory of the helium. The experiments have confirmed the existence of two critical velocities, and we discuss whether these critical velocities are associated with quantized vortices.
- Subjects
OSCILLATIONS; SUPERFLUIDITY; COPPER; HELIUM at low temperatures; CRITICAL phenomena (Physics); VORTEX motion
- Publication
Journal of Low Temperature Physics, 2010, Vol 158, Issue 3/4, p462
- ISSN
0022-2291
- Publication type
Article