Experiments on a high quality grid oscillating in superfluid 4He at very low temperatures.

Efimov, V. B. and Garg, D. and Giltrow, M. and McClintock, P. V. E. and Skrbek, L. and Vinen, W. F. (2010) Experiments on a high quality grid oscillating in superfluid 4He at very low temperatures. Journal of Low Temperature Physics, 158 (3-4). pp. 462-467. ISSN 0022-2291

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Abstract

We have investigated a copper-mesh grid oscillating at its fundamental (0, 1) Bessel mode in superfluid 4He for temperatures 10< T <1500 mK at a pressure of P = 5 bar. The high quality factor (Q ∼ 10 to power 5) 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.

Item Type: Journal Article
Journal or Publication Title: Journal of Low Temperature Physics
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 35024
Deposited By: Professor P. V. E. McClintock
Deposited On: 05 Jan 2011 10:49
Refereed?: Yes
Published?: Published
Last Modified: 21 Sep 2019 00:05
URI: https://eprints.lancs.ac.uk/id/eprint/35024

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