Search Results - "Guenault, A.M."

Decay of Pure Quantum Turbulence in Superfluid {sup 3}He-B by Bradley, D.I., Clubb, D.O., Fisher, S.N., Guenault, A.M., Haley, R.P., Matthews, C.J., Pickett, G.R., Tsepelin, V., Zaki, K.

“…We describe measurements of the decay of pure superfluid turbulence in superfluid {sup 3}He-B, in the low temperature regime where the normal fluid density is…”
Get full text

Emission of Discrete Vortex Rings by a Vibrating Grid In Superfluid {sup 3}He-B: A Precursor to Quantum Turbulence by Bradley, D.I., Clubb, D.O., Fisher, S.N., Guenault, A.M., Haley, R.P., Matthews, C.J., Pickett, G.R., Tsepelin, V., Zaki, K.

“…We report a transition in the vorticity generated by a grid moving in the B phase of superfluid {sup 3}He at T<<T{sub c}. The evolution of the vorticity after…”
Get full text

Andreev Reflection in Superfluid 3He: A Probe for Quantum Turbulence by Bradley, D.I, Guénault, A.M, Haley, R.P, Pickett, G.R, Tsepelin, V

“…Andreev reflection, familiar in superconducting systems, shows a much more extensive set of behaviors in the p -wave condensate of superfluid 3 He. We discuss…”
Get full text

Andreev Reflection in Superfluid 3 He: A Probe for Quantum Turbulence by Bradley, D.I., Guénault, A.M., Haley, R.P., Pickett, G.R., Tsepelin, V.

“…Andreev reflection, familiar in superconducting systems, shows a much more extensive set of behaviors in the p-wave condensate of superfluid 3 He. We discuss…”
Get full text

Probing Bogoliubov Quasiparticles in Superfluid 3He with a ‘Vibrating-Wire Like’ MEMS Device by Defoort, M., Dufresnes, S., Ahlstrom, S. L., Bradley, D. I., Haley, R. P., Guénault, 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 3 He–B and a micro-machined goalpost-shaped device at temperatures below 0.2 T c . The measured damping…”
Get full text

Blackbody source and detector of ballistic quasiparticles in sup 3 He- B : Emission angle from a wire moving at supercritical velocity by Fisher, S.N., Guenault, A.M., Kennedy, C.J., Pickett, G.R.

“…Using a new quasiparticle detector and source consisting of a blackbody radiator, we have made the first measurements of the divergence of a beam of…”
Get full text

Resonant observation of the Landau field in superfluid sup 3 He- B by NMR by Bunkov, Y.M., Fisher, S.N., Guenault, A.M., Kennedy, C.J., Pickett, G.R.

“…We report the first experimental observation of the internal precession of the normal and superfluid magnetizations around the molecular Landau field in {sup…”
Get full text

Exponential, rather than power-law, temperature dependence of the damping of a vibrating-wire resonator in sup 3 He- A at low temperatures by Fisher, S.N., Guenault, A.M., Kennedy, C.J., Pickett, G.R.

“…We have measured the damping of a vibrating-wire resonator in liquid {sup 3}He-{ital A} down to temperatures of {ital T}{sub {ital c}}/{ital T} of 7 at zero…”
Get full text

Distortion of superfluid sup 3 He- B as a function of magnetic field and the first-order transition to sup 3 He- A at the T =0 limit by Fisher, S.N., Guenault, A.M., Kennedy, C.J., Pickett, G.R.

“…We have observed the distortion of the gap and associated excitation spectrum in superfluid {sup 3}He-{ital B} with increasing magnetic field up to the…”
Get full text

Possible vortex production by a vibrating wire in superfluid 3He–B by Bradley, D.I, Guénault, A.M

“…We observe spectacular features on the force–velocity characteristic of a vibrating wire resonator in superfluid 3He–B at ultralow temperatures. There are both…”
Get full text

Beyond the two-fluid model: Transition from linear behavior to a velocity-independent force on a moving object in sup 3 He- B by Fisher, S.N., Guenault, A.M., Kennedy, C.J., Pickett, G.R.

“…Using a simple one-dimensional model, we show that the existence of the energy gap for excitations in an isotropic BCS superfluid leads to strongly nonlinear…”
Get full text

A spin laser? The persistent precessing domain in superfluid [formula omitted]-B at ultralow temperatures by Fisher, S.N, Guénault, A.M, Pickett, G.R, Skyba, P

“…We discuss various properties of the persistent precessing domain (PPD, formerly PIS) in superfluid 3 He -B. These exotic NMR domains can only be excited at…”
Get full text

The interfacial thermal resistance between bulk superfluid [formula omitted] and liquid [formula omitted] in aerogel at ultralow temperatures by Fisher, S.N., Guénault, A.M., Pickett, G.R., Sauer, F.

“…We present the first measurements of the thermal boundary resistance of the interface between the two different liquid phases: bulk superfluid and liquid…”
Get full text

Thermal behavior of quasiparticles in sup 3 He-B by Carney, J.P., Coates, K.F., Guenault, A.M., Pickett, G.R., Spencer, G.F.

“…The authors describe experiments on the transport of heat within a cell cooled by nuclear demagnetization of copper and containing {sup 3}He-B at temperatures…”
Get full text

A new NMR mode in the Landau field in superfluid [sup 3]He-B by Bunkov, Y.M., Fisher, S.N., Guenault, A.M., Kennedy, C.J., Pickett, G.R.

“…The authors report the experimental observation of the separate internal precession of the normal and superfluid magnetizations around the molecular Landau…”
Get full text

Spatial extent of quantum turbulence in non-rotating superfluid [formula omitted]He–B by Bradley, D.I., Fisher, S.N., Guénault, A.M., Lowe, M.R., Pickett, G.R., Rahm, A.

“…Quantum turbulence has been shown to reflect a beam of quasiparticles in the B-phase of superfluid 3 He by Andreev processes. We have investigated the…”
Get full text

Superfluid [formula omitted] A–B surface tension by Bartkowiak, M., Haley, R.P., Fisher, S.N., Guénault, A.M., Pickett, G.R., Skyba, P.

“…We have made two different measurements of interfacial energies below 300 μK , at zero pressure and in magnetic fields up to 400 mT . A variable magnetic field…”
Get full text

Direct observation of the Andreev reflection of a quasiparticle beam by quantum turbulence in superfluid [formula omitted]-B by Bradley, D.I., Fisher, S.N., Guénault, A.M., Lowe, M.R., Pickett, G.R., Rahm, A.

“…A beam of quasiparticles from a black-body radiator is directed at a localized region of quantum turbulence generated by a vibrating wire resonator driven at…”
Get full text

A compact dilution refrigerator with vertical heat exchangers for operation to 2 mK by BUNKOV, YU. M, GUENAULT, A. M, HAYWARD, D. J, JACKSON, D. A, KENNEDY, C. J, NICHOLS, T. R, MILLER, I. E, PICKETT, G. R, WARD, M. G

“…We describe a compactly designed dilution refrigerator with closely packed, vertical heat exchangers. The refrigerator reaches a temperature of 2mK and is…”
Get full text

Forced oscillation of the A–B phase boundary in superfluid 3He by Bartkowiak, M, Fisher, S.N, Guénault, A.M, Haley, R.P, Plenderleith, G.N, Pickett, G.R, Skyba, P

“…We present measurements conducted on the oscillating interface between superfluid 3He A and B. The measurements, made at 150 μK , are taken at frequencies…”
Get full text