title: Cantilever anemometer based on a superconducting micro-resonator: application to superfluid turbulence.
abstract: 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 ≈ 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.
authors.affiliation: Institut Néel, CNRS/UJF BP 166, 38042 Grenoble cedex 9, France.
authors.forename: J
authors.initials: J
authors.lastname: Salort
authors.forename: A
authors.initials: A
authors.lastname: Monfardini
authors.forename: P-E
authors.initials: PE
authors.lastname: Roche