Mutual interactions between objects oscillating in isotopically pure superfluid He-4 in the T -> 0 limit

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10131293" target="_blank" >RIV/00216208:11320/12:10131293 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.4765091" target="_blank" >http://dx.doi.org/10.1063/1.4765091</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4765091" target="_blank" >10.1063/1.4765091</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mutual interactions between objects oscillating in isotopically pure superfluid He-4 in the T -> 0 limit

Popis výsledku v původním jazyce

We report the results of experiments to explore interactions between physically separated oscillating objects in isotopically pure superfluid He-4 at T similar to 10 mK. The investigations focused mainly on 32 kHz quartz tuning forks, but also consider anearby 1 kHz oscillating grid. The low-drive linewidth (LDL) and resonant frequency f(d) of a detector fork were monitored while the maximum velocity of a transmitter fork, separated from the detector by a few mm, was varied over a wide range. Clear evidence was found for mutual interactions between the two forks, and for the influence of the grid on the forks. Monitoring the detector's LDL and f(d) provides evidence for a generator critical velocity in the range 0.3 < nu(c1) < 1.0 cm/s for onset of the detector responses, in addition to a second critical velocity nu(c2) similar to 13 cm/s probably corresponding to the production of quantum turbulence at the generator. The results are discussed, but are not yet fully understood. (C) 20

Název v anglickém jazyce

Mutual interactions between objects oscillating in isotopically pure superfluid He-4 in the T -> 0 limit

Popis výsledku anglicky

We report the results of experiments to explore interactions between physically separated oscillating objects in isotopically pure superfluid He-4 at T similar to 10 mK. The investigations focused mainly on 32 kHz quartz tuning forks, but also consider anearby 1 kHz oscillating grid. The low-drive linewidth (LDL) and resonant frequency f(d) of a detector fork were monitored while the maximum velocity of a transmitter fork, separated from the detector by a few mm, was varied over a wide range. Clear evidence was found for mutual interactions between the two forks, and for the influence of the grid on the forks. Monitoring the detector's LDL and f(d) provides evidence for a generator critical velocity in the range 0.3 < nu(c1) < 1.0 cm/s for onset of the detector responses, in addition to a second critical velocity nu(c2) similar to 13 cm/s probably corresponding to the production of quantum turbulence at the generator. The results are discussed, but are not yet fully understood. (C) 20

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Low Temperature Physics

ISSN

1063-777X

e-ISSN

—

Svazek periodika

38

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

1026-1030

Kód UT WoS článku

000312045400006

EID výsledku v databázi Scopus

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