Experiments on a High Quality Grid Oscillating in Superfluid He-4 at Very Low Temperatures

VB Efimov; D Garg; M Giltrow; PVE McClintock; L Skrbek; William Vinen

doi:10.1007/s10909-009-9992-x

Experiments on a High Quality Grid Oscillating in Superfluid He-4 at Very Low Temperatures

VB Efimov, D Garg, M Giltrow, PVE McClintock, L Skrbek, William Vinen

Physics and Astronomy

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17 Citations (Scopus)

Abstract

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

Original language	English
Pages (from-to)	462-467
Number of pages	6
Journal	Journal of Low Temperature Physics
Volume	158
Issue number	3-4
DOIs	https://doi.org/10.1007/s10909-009-9992-x
Publication status	Published - 1 Feb 2010

Keywords

Quantum fluid
Critical velocity
Superfluid helium
Quantum turbulence
Vibrating grid

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

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AU - Efimov, VB

AU - Garg, D

AU - Giltrow, M

AU - McClintock, PVE

AU - Skrbek, L

AU - Vinen, William

PY - 2010/2/1

Y1 - 2010/2/1

N2 - We have investigated a copper-mesh grid oscillating at its fundamental (0, 1) Bessel mode in superfluid He-4 for temperatures 10 <T <1500 mK at a pressure of P=5 bar. The high quality factor (Q similar to 10(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.

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

KW - Quantum fluid

KW - Critical velocity

KW - Superfluid helium

KW - Quantum turbulence

KW - Vibrating grid

U2 - 10.1007/s10909-009-9992-x

DO - 10.1007/s10909-009-9992-x

M3 - Article

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VL - 158

SP - 462

EP - 467

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

IS - 3-4

ER -

Experiments on a High Quality Grid Oscillating in Superfluid He-4 at Very Low Temperatures

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Keywords

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