Cantilever anemometer based on a superconducting micro-resonator: Application to superfluid turbulence

Journal Article · Sat Dec 15 00:00:00 EST 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4770119· OSTI ID:22094040

Salort, J.; Monfardini, A.; Roche, P. -E. ^[1]

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1. Institut Neel, CNRS/UJF BP 166, 38042 Grenoble cedex 9 (France)

We present a new type of cryogenic local velocity probe that operates in liquid helium (1 K < T < 4.2 K) and achieves a spatial resolution of Almost-Equal-To 0.1 mm. The operating principle is based on the deflection of a micro-machined silicon cantilever which reflects the local fluid velocity. Deflection is probed using a superconducting niobium micro-resonator sputtered on the sensor and used as a strain gauge. We present the working principle and the design of the probe, as well as calibration measurements and velocity spectra obtained in a turbulent helium flow above and below the superfluid transition.

• OSTI ID: 22094040
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 12; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANEMOMETERS
DESIGN
HELIUM
LIQUIDS
NIOBIUM
RESONATORS
SENSORS
SILICON
SPATIAL RESOLUTION
SPECTRA
SPUTTERING
STRAIN GAGES
SUPERCONDUCTORS
SUPERFLUIDITY
TEMPERATURE RANGE 0000-0013 K
TURBULENCE