Search Results - "Bradley, DI"

Breaking the superfluid speed limit in a fermionic condensate by Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Lawson, C. R., Pickett, G. R., Schanen, R., Skyba, M., Tsepelin, V., Zmeev, D. E.

“…An experiment reports the unexpected behaviour of an object in uniform motion in superfluid helium-3 above the Landau critical velocity — the limit above which…”
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Direct measurement of the energy dissipated by quantum turbulence by Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R., Potts, D., Tsepelin, V.

“…It is difficult to measure the turbulent energy in a classical system as the turbulence contributes only a small kinetic energy compared with the enthalpy of…”
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Decay of Pure Quantum Turbulence in Superfluid He 3 − B by Bradley, D. I., Clubb, D. O., Fisher, S. N., Guénault, A. M., Haley, R. P., Matthews, C. J., Pickett, G. R., Tsepelin, V., Zaki, K.

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Probing Bogoliubov Quasiparticles in Superfluid \( reversible reaction \)He with a 'Vibrating-Wire Like' MEMS Device by Defoort, M, Dufresnes, S, Ahlstrom, S L, Bradley, DI, Haley, R P, Guenault, A M, Guise, E A, Pickett, G R, Poole, M, Woods, A J, Tsepelin, V, Fisher, S N, Godfrin, H, Collin, E

“…We have measured the interaction between superfluid \( reversible reaction \)He-B and a micro-machined goalpost-shaped device at temperatures below…”
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Emission of Discrete Vortex Rings by a Vibrating Grid In Superfluid He 3 − B : A Precursor to Quantum Turbulence by Bradley, D. I., Clubb, D. O., Fisher, S. N., Guénault, A. M., Haley, R. P., Matthews, C. J., Pickett, G. R., Tsepelin, V., Zaki, K.

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A Quasiparticle Detector for Imaging Quantum Turbulence in Superfluid $ reversible reaction $ He-B by Ahlstrom, S L, Bradley, DI, Fisher, S N, Guenault, A M, Guise, E A, Haley, R P, Holt, S, Kolosov, O, McClintock, PVE, Pickett, G R, Poole, M, Schanen, R, Tsepelin, V, Woods, A J

“…We describe the development of a two-dimensional quasiparticle detector for use in visualising quantum turbulence in superfluid $ reversible reaction $ He-B at…”
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Hysteresis, Switching and Anomalous Behaviour of a Quartz Tuning Fork in Superfluid 4He by Bradley, D. I., Fear, M. J., Fisher, S. N., Guénault, A. M., Haley, R. P., Lawson, C. R., Pickett, G. R., Schanen, R., Tsepelin, V., Wheatland, L. A.

“…We have been studying the behaviour of commercial quartz tuning forks immersed in superfluid 4 He and driven at resonance. For one of the forks we have…”
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Response of a Mechanical Oscillator in Solid 4He by Ahlstrom, S. L., Bradley, D. I., Človečko, M., Fisher, S. N., Guénault, A. M., Guise, E. A., Haley, R. P., Kolosov, O., Kumar, M., McClintock, P. V. E., Pickett, G. R., Polturak, E., Poole, M., Todoshchenko, I., Tsepelin, V., Woods, A. J.

“…We present the first measurements of the response of a mechanical oscillator in solid 4 He. We use a lithium niobate tuning fork operating in its fundamental…”
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Plastic Properties of Solid 4He Probed by a Moving Wire: Viscoelastic and Stochastic Behavior Under High Stress by Ahlstrom, S. L., Bradley, D. I., Človečko, M., Fisher, S. N., Guénault, A. M., Guise, E. A., Haley, R. P., Kumar, M., McClintock, P. V. E., Pickett, G. R., Polturak, E., Poole, M., Todoshchenko, I., Tsepelin, V., Woods, A. J.

“…We present measurements of a thin wire moving through solid 4 He. Measurements were made over a wide temperature range at pressures close to the melting curve…”
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Anomalous Damping of a Low Frequency Vibrating Wire in Superfluid 3He-B due to Vortex Shielding by Bradley, D. I., Fear, M. J., Fisher, S. N., Guénault, A. M., Haley, R. P., Lawson, C. R., Pickett, G. R., Schanen, R., Tsepelin, V.

“…We have investigated the behaviour of a large vibrating wire resonator in the B-phase of superfluid 3 He at zero pressure and at temperatures below 200 μK. The…”
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The Onset of Vortex Production by a Vibrating Wire in Superfluid 3He-B by Bradley, D. I., Fisher, S. N., Ganshin, A., Guénault, A. M., Haley, R. P., Jackson, M. J., Pickett, G. R., Tsepelin, V.

“…We present measurements of the force-velocity response of a vibrating wire resonator in superfluid 3 He-B at very low temperatures. At low velocities the…”
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Thermometry in Normal Liquid 3He Using a Quartz Tuning Fork Viscometer by Bradley, D. I., Človečko, M., Fisher, S. N., Garg, D., Guénault, A. M., Guise, E., Haley, R. P., Pickett, G. R., Poole, M., Tsepelin, V.

“…We have developed the use of quartz tuning forks for thermometry in normal liquid 3 He. We have used a standard 32 kHz tuning fork to measure the viscosity of…”
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Repetitive single vortex-loop creation by a vibrating wire in superfluid 3He-B by Bradley, DI

“…Spectacular features are observed on the velocity-force characteristics of a vibrating wire resonator in superfluid 3He-B at ultralow temperatures. Both…”
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Phonon excitation of quasiparticles in niobium and tantalum superconducting tunnel junction photon detectors by Wigmore, J.K, Boyd, P, Steele, A.C, Kozorezov, A.G, Bradley, D.I

“…We report phonon pulse measurements of quasiparticle (qp) self-recombination and trapping by Abrikosov vortices in Nb and Ta superconducting tunnel junctions…”
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Potential Dark Matter Detector? The Detection of Low Energy Neutrons by Superfluid 3He by Bradley, DI, Bunkov, YM, Cousins, DJ, Enrico, MP, Fisher, SN, Follows, MR, Guénault, AM, Hayes, WM, Pickett, GR, Sloan, T

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Heat pulse studies of quasiparticle dynamics in superconducting tunnel junction photon detectors by Steele, A.C., Boyd, P., Kozorezov, A.G., Wigmore, J.K., Bradley, D.I.

“…We describe experiments to characterise the responsivity of superconducting tunnel junction (STJ) X-ray detectors in which the absorbed photons were simulated…”
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An RF-SQUID amplifier system for use with vibrating wire resonators by BRADLEY, D. I, HAYES, W. M

“…We describe the design and use of a simple RF-SQUID preamplifier for measurements involving vibrating wire resonators. For typical vibrating wires with a…”
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Measuring the decay of vorticity in superfluid super(3)He-B - a progress report by Bradley, D I, Fisher, S N, Hayes, W M

“…Recent measurements in superfluid super(3)He-B have been interpreted as evidence in support of the Kibble-Zurek hypothesis for the formation of defects in the…”
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New methods for nuclear cooling into the microkelvin regime by BRADLEY, D. I, GUÉNAULT, A. M, KEITH, V, KENNEDY, C. J, MILLER, I. E, MUSSETT, S. G, PICKETT, G. R, PRATT, W. P. JR

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Nuclear orientation below 1 mK: Development and applications by Bradley, D. I., White, J. P., Ashworth, C. J., Rikovska, J., Stone, N. J.

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