The Damping of a Micro-electromechanical Resonator in the Presence of Quantum Turbulence in He II

ORAL

Abstract

A micro-electromechanical plate resonator was immersed in 4He down to 13 mK at saturated vapor pressure. The resonator consists of a 125x125x2 μm3 plate suspended 2 μm above a substrate. Due to its small mass and and large surface area it is sensitive to vortices in the fluid and vortices pinned to the surface of the device. The device is studied in the presence of fully developed quantum turbulence generated by a quartz tuning fork and in the presence of remnant vortices pinned to the device. Specifically, the velocity dependent damping of the device in these conditions is measured and reported.

*This work is supported by the National Science Foundation through DMR-1708818.

–

Presenters

  • Colin Barquist

    • University of Florida
    • Physics, University of Florida

Authors

  • Colin Barquist

    • University of Florida
    • Physics, University of Florida

  • Wenguang Jiang

    • University of Florida
    • Physics, University of Florida

  • Keegan Gunther

    • University of Florida

  • Yoonseok Lee

    • University of Florida
    • Physics, University of Florida

  • Ho Bun Chan

    • Physics, Hong Kong University of Science and Technology