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 - Vortex generation in superfluid He-3 by a vibrating grid.
AU - Bradley, D. Ian
AU - Clubb, D. O.
AU - Fisher, Shaun N.
AU - Guénault, A.M.
AU - Matthews, C. J.
AU - Pickett, George R.
PY - 2004/1
Y1 - 2004/1
N2 - Recently we have found that a vibrating wire resonator produces turbulence in superfluid He-3-B at low temperatures when driven above its pair-breaking critical velocity. The vorticity is produced along with a beam of excitations from pair breaking. Here, we discuss preliminary measurements of turbulence generated from an oscillating grid at low temperatures. The grid oscillator is made from a goal-post shaped vibrating wire resonator supporting a fine copper mesh. While the dissipation by a conventional wire resonator is dominated by pair-breaking at the velocities required for turbulence generation, the dissipation of the grid oscillator appears to be dominated by turbulence. This allows us to generate turbulence without the unwanted effects of a quasiparticle beam. Preliminary measurements suggest that the grid turbulence has a rather different behaviour from that generated by conventional wire resonators.
AB - Recently we have found that a vibrating wire resonator produces turbulence in superfluid He-3-B at low temperatures when driven above its pair-breaking critical velocity. The vorticity is produced along with a beam of excitations from pair breaking. Here, we discuss preliminary measurements of turbulence generated from an oscillating grid at low temperatures. The grid oscillator is made from a goal-post shaped vibrating wire resonator supporting a fine copper mesh. While the dissipation by a conventional wire resonator is dominated by pair-breaking at the velocities required for turbulence generation, the dissipation of the grid oscillator appears to be dominated by turbulence. This allows us to generate turbulence without the unwanted effects of a quasiparticle beam. Preliminary measurements suggest that the grid turbulence has a rather different behaviour from that generated by conventional wire resonators.
KW - superfluid
KW - helium-3
KW - QUANTUM TURBULENCE
U2 - 10.1023/B:JOLT.0000012583.04295.19
DO - 10.1023/B:JOLT.0000012583.04295.19
M3 - Journal article
VL - 134
SP - 381
EP - 386
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 1-2
ER -