Search Results - "Človečko, M."

Quartz Tuning Fork: Thermometer, Pressure- and Viscometer for Helium Liquids by Blaauwgeers, R., Blazkova, M., Človečko, M., Eltsov, V. B., de Graaf, R., Hosio, J., Krusius, M., Schmoranzer, D., Schoepe, W., Skrbek, L., Skyba, P., Solntsev, R. E., Zmeev, D. E.

“…Commercial quartz oscillators of the tuning-fork type with a resonant frequency of ∼ 32 kHz have been investigated in helium liquids. The oscillators are found…”
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Vibrating Quartz Fork—A Tool for Cryogenic Helium Research by Blažková, M., Človečko, M., Eltsov, V. B., Gažo, E., de Graaf, R., Hosio, J. J., Krusius, M., Schmoranzer, D., Schoepe, W., Skrbek, L., Skyba, P., Solntsev, R. E., Vinen, W. F.

“…Oscillating objects such as discs, piles of discs, spheres, grids and wires have been widely used in cryogenic fluid dynamics and in quantum fluids research…”
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Quartz tuning fork—A potential low temperature thermometer in high magnetic fields by Človečko, M., Skyba, P.

“…We present the performance of commercial quartz tuning forks (QTFs) operating at resonance frequencies of 32 kHz, 77 kHz, and 100 kHz in the temperature range…”
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Magnonic Analog of Black- and White-Hole Horizons in Superfluid He 3 − B by Človečko, M., Gažo, E., Kupka, M., Skyba, P.

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Probing Andreev Reflection in Superfluid He-B Using a Quartz Tuning Fork by Bradley, D I, Clovecko, M, Gazo, E, Skyba, P

“…Direct measurements of the Andreev reflection of the quasiparticles excitations in superfluid He-B in the ballistic regime at 0.5 bar using a quartz tuning…”
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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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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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High Q value Quartz Tuning Fork in Vacuum as a Potential Thermometer in Millikelvin Temperature Range by Človečko, M., Grajcar, M., Kupka, M., Neilinger, P., Rehák, M., Skyba, P., Vavrek, F.

“…The results of a newly developed pulse-demodulation (P-D) technique introduced to determine the resonant characteristics of a high Q value quartz tuning forks…”
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Magnonic Analog of Black- and White-Hole Horizons in Superfluid He3−B by Človečko, M, Gažo, E, Kupka, M, Skyba, P

“…We report on the theoretical model and experimental results of the experiment made in a limit of absolute zero temperature (∼600  μK) studying the spin wave…”
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Quantum Turbulence Generated and Detected by a Vibrating Quartz Fork by Blažková, M., Človečko, M., Gažo, E., Skrbek, L., Skyba, P.

“…Flow due to a commercially available vibrating quartz fork is studied in gaseous helium, He I, He II and He-B, over a wide range of temperatures and pressures…”
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Vacuum Measurements of a Novel Micro-resonator Based on Tin Whiskers Performed at mK Temperatures by Človečko, M., Gažo, E., Longauer, S., Múdra, E., Skyba, P., Vavrek, F., Vojtko, M.

“…We present a method of preparation and preliminary vacuum measurements conducted at ∼20 mK of a new type of micro-resonator based on Sn-whiskers. Sn-whiskers…”
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Probing Andreev Reflection in Superfluid 3He-B Using a Quartz Tuning Fork by Bradley, D. I., Človečko, M., Gažo, E., Skyba, P.

“…Direct measurements of the Andreev reflection of the quasiparticles excitations in superfluid 3 He-B in the ballistic regime at 0.5 bar using a quartz tuning…”
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Magnonic Analog of Black- and White-Hole Horizons in Superfluid ^{3}He-B by Človečko, M, Gažo, E, Kupka, M, Skyba, P

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A New Device for Studying Low or Zero Frequency Mechanical Motion at Very Low Temperatures by Bradley, D. I., Človec̆ko, M., Fear, M. J., Fisher, S. N., Guénault, A. M., Haley, R. P., Lawson, C. R., Pickett, G. R., Schanen, R., Tsepelin, V., Williams, P.

“…We have developed a new “floppy wire” device for studying the motion through quantum fluids and solids at very low temperatures. The device is particularly…”
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Frequency-dependent drag from quantum turbulence produced by quartz tuning forks in superfluid He 4 by Ahlstrom, S. L., Bradley, D. I., Človečko, M., Fisher, S. N., Guénault, A. M., Guise, E. A., Haley, R. P., Kolosov, O., McClintock, P. V. E., Pickett, G. R., Poole, M., Tsepelin, V., Woods, A. J.

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New Non-Goldstone Collective Mode of BEC of Magnons in Superfluid He 3 − B by Človečko, M., Gažo, E., Kupka, M., Skyba, P.

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Magnonic Analogue Black/White Hole Horizon in Superfluid $^3$He-B: experiment by Človečko, M, Gažo, E, Skyba, P

“…We provide experimental details of the first experiment made in zero temperature limit ($\sim$ 600\,$\mu$K) studying the magnonic black/white hole horizon…”
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Magnonic Analogue of Black/White Hole Horizon in Superfluid $^3$He-B by Človečko, M, Gažo, E, Kupka, M, Skyba, P

“…Phys. Rev. Lett. 123, 161302 (2019) We report on theoretical model and experimental results of the experiment made in a limit of absolute zero temperature…”
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Crossover from hydrodynamic to acoustic drag on quartz tuning forks in normal and superfluid 4 He by Bradley, D. I., Človečko, M., Fisher, S. N., Garg, D., Guise, E., Haley, R. P., Kolosov, O., Pickett, G. R., Tsepelin, V., Schmoranzer, D., Skrbek, L.

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