TY - JOUR

T1 - Turbulence generated by vibrating wire resonators in superfluid He-4 at low temperatures.

AU - Bradley, D. Ian

AU - Clubb, D. O.

AU - Fisher, Shaun N.

AU - Guénault, A.M.

AU - Haley, Richard P.

AU - Matthews, C. J.

AU - Pickett, George R.

AU - Zaki, K. L.

PY - 2005/2

Y1 - 2005/2

N2 - We have measured responses of vibrating wire resonators in superfluid He-4 at millikelvin temperatures. We find evidence for turbulence generation above a critical velocity on the order of a few cm/s. At the critical velocity for the onset of turbulence, the resonator velocity abruptly decreases and shows hysteretic behavior. Surprisingly we find that the resonant frequencies of the resonators increase in the turbulent regime. We also find that the critical velocity may be reduced by the presence of turbulence generated by a neighboring vibrating wire resonator, allowing the detection of existing turbulence in the low temperature regime.

AB - We have measured responses of vibrating wire resonators in superfluid He-4 at millikelvin temperatures. We find evidence for turbulence generation above a critical velocity on the order of a few cm/s. At the critical velocity for the onset of turbulence, the resonator velocity abruptly decreases and shows hysteretic behavior. Surprisingly we find that the resonant frequencies of the resonators increase in the turbulent regime. We also find that the critical velocity may be reduced by the presence of turbulence generated by a neighboring vibrating wire resonator, allowing the detection of existing turbulence in the low temperature regime.

KW - QUANTUM TURBULENCE

KW - HE-4

U2 - 10.1007/s10909-005-2240-0

DO - 10.1007/s10909-005-2240-0

M3 - Journal article

VL - 138

SP - 493

EP - 498

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 3-4

ER -