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 - Measuring the Prong Velocity of Quartz Tuning Forks Used to Probe Quantum Fluids
AU - Bradley, Ian
AU - Crookston, Pamela
AU - Fear, Matthew
AU - Fisher, Shaun
AU - Foulds, George
AU - Garg, D.
AU - Guénault, A.M.
AU - Guise, Edward Ashley
AU - Haley, Richard
AU - Kolosov, Oleg
AU - Pickett, George
AU - Schanen, Roch
AU - Tsepelin, Viktor
PY - 2010/12
Y1 - 2010/12
N2 - Recently, quartz tuning forks have been used to probe the dynamics of quantum fluids. For many of these measurements it is important to know the velocity amplitude of the tips of the vibrating fork prongs. We have used different techniques to establish, with an accuracy of a few percent, the relationship between the electrical and mechanical properties of several commercial quartz tuning forks with fundamental resonant frequency similar to 32 kHz. The velocity is usually inferred from an electro-mechanical calibration that models a quartz prong as a clamped, rectangular cantilever beam. We have tested the accuracy of this calibration using three methods: measurement of the amplitude at which the fork prongs touch each other; direct optical measurement of the moving fork prongs using strobe microscopy; and a Michelson interferometry technique operating with a 670 nm laser. All three methods yield consistent results. The velocity so determined is found to be 10% lower than that of the standard electro-mechanical calibration.
AB - Recently, quartz tuning forks have been used to probe the dynamics of quantum fluids. For many of these measurements it is important to know the velocity amplitude of the tips of the vibrating fork prongs. We have used different techniques to establish, with an accuracy of a few percent, the relationship between the electrical and mechanical properties of several commercial quartz tuning forks with fundamental resonant frequency similar to 32 kHz. The velocity is usually inferred from an electro-mechanical calibration that models a quartz prong as a clamped, rectangular cantilever beam. We have tested the accuracy of this calibration using three methods: measurement of the amplitude at which the fork prongs touch each other; direct optical measurement of the moving fork prongs using strobe microscopy; and a Michelson interferometry technique operating with a 670 nm laser. All three methods yield consistent results. The velocity so determined is found to be 10% lower than that of the standard electro-mechanical calibration.
KW - SUPERFLUID HE-4
KW - HELIUM LIQUIDS
KW - TURBULENCE
KW - TRANSITION
UR - http://www.scopus.com/inward/record.url?scp=78650291489&partnerID=8YFLogxK
U2 - 10.1007/s10909-010-0227-y
DO - 10.1007/s10909-010-0227-y
M3 - Journal article
AN - SCOPUS:78650291489
VL - 161
SP - 536
EP - 547
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 5-6
ER -