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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BK - Liquid mechanics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2012

Confidentiality

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

Name of the periodical

Low Temperature Physics

ISSN

1063-777X

e-ISSN

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Volume of the periodical

38

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

6

Pages from-to

1026-1030

UT code for WoS article

000312045400006

EID of the result in the Scopus database

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