Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A New Device for Studying Low or Zero Frequency Mechanical Motion at Very Low Temperatures
AU - Bradley, Ian
AU - Clovecko, Marcel
AU - Fear, Matthew
AU - Fisher, Shaun
AU - Guénault, A.M.
AU - Haley, Richard
AU - Lawson, Christopher
AU - Pickett, George
AU - Schanen, Roch
AU - Tsepelin, Viktor
AU - Williams, Paul
PY - 2011/11
Y1 - 2011/11
N2 - We have developed a new "floppy wire" device for studying the motion through quantum fluids and solids at very low temperatures. The device is particularly well suited for producing large amplitudes of motion, for measuring drag forces at low frequency, and for studying "zero" frequency dynamics by measuring transient behavior. The device is very versatile and allows motion to be studied over a broad range of velocities and amplitudes. It generates negligible heat leaks and so is ideally suited for ultra low temperature experiments. The device has many potential applications in quantum fluids and solids research, including the study of drag forces at low frequencies in both the laminar and turbulent flow regimes, and the investigation of motion in (super)solid (4)He. We discuss the principles and modes of operation of the device and present some preliminary measurements in vacuum, in normal liquid (3)He and in superfluid (4)He. We also present measurements of a "floppy grid" device, which could be used for generating large volumes of quantum turbulence in superfluids at low temperatures.
AB - We have developed a new "floppy wire" device for studying the motion through quantum fluids and solids at very low temperatures. The device is particularly well suited for producing large amplitudes of motion, for measuring drag forces at low frequency, and for studying "zero" frequency dynamics by measuring transient behavior. The device is very versatile and allows motion to be studied over a broad range of velocities and amplitudes. It generates negligible heat leaks and so is ideally suited for ultra low temperature experiments. The device has many potential applications in quantum fluids and solids research, including the study of drag forces at low frequencies in both the laminar and turbulent flow regimes, and the investigation of motion in (super)solid (4)He. We discuss the principles and modes of operation of the device and present some preliminary measurements in vacuum, in normal liquid (3)He and in superfluid (4)He. We also present measurements of a "floppy grid" device, which could be used for generating large volumes of quantum turbulence in superfluids at low temperatures.
KW - Superfluid
KW - Mechanical oscillator
KW - Hydrodynamics
KW - Turbulence
UR - http://www.scopus.com/inward/record.url?scp=80055073728&partnerID=8YFLogxK
U2 - 10.1007/s10909-011-0388-3
DO - 10.1007/s10909-011-0388-3
M3 - Journal article
AN - SCOPUS:80055073728
VL - 165
SP - 114
EP - 131
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 3-4
ER -