About: Behavior of quartz forks oscillating in isotopically pure He-4 in the T -> 0 limit

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About: Behavior of quartz forks oscillating in isotopically pure He-4 in the T -> 0 limit Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1103/PhysRevB.85.144518
Description	We report that at low drives, the resonant frequencies and linewidths of nominally 32-kHz quartz tuning forks oscillating in isotopically pure superfluid He-4 at similar to 10 mK are dependent on the dimensions of their environment. We confirm the importance of coupling between forks and acoustic modes within the cell, and develop a theory of their coupled dynamics to account for the observations. The frequencies and linewidths are reproducible on a time scale of tens of minutes, but pronounced drifts are seen over longer intervals. We suggest that the drifts are attributable to changes in the velocity of sound due to tiny pressure changes. In studies at high drives, we observe two critical velocities: v(c1) approximate to 0.6 cm/s, where the drag may either increase or decrease, depending on the linewidth; and v(c2) approximate to 10 cm/s, above which there seems to be fully turbulent flow. At high drives, the behavior of the drag differs markedly between forks that appear otherwise to be very similar. We report that at low drives, the resonant frequencies and linewidths of nominally 32-kHz quartz tuning forks oscillating in isotopically pure superfluid He-4 at similar to 10 mK are dependent on the dimensions of their environment. We confirm the importance of coupling between forks and acoustic modes within the cell, and develop a theory of their coupled dynamics to account for the observations. The frequencies and linewidths are reproducible on a time scale of tens of minutes, but pronounced drifts are seen over longer intervals. We suggest that the drifts are attributable to changes in the velocity of sound due to tiny pressure changes. In studies at high drives, we observe two critical velocities: v(c1) approximate to 0.6 cm/s, where the drag may either increase or decrease, depending on the linewidth; and v(c2) approximate to 10 cm/s, above which there seems to be fully turbulent flow. At high drives, the behavior of the drag differs markedly between forks that appear otherwise to be very similar. (en)
Title	Behavior of quartz forks oscillating in isotopically pure He-4 in the T -> 0 limit Behavior of quartz forks oscillating in isotopically pure He-4 in the T -> 0 limit (en)
skos:prefLabel	Behavior of quartz forks oscillating in isotopically pure He-4 in the T -> 0 limit Behavior of quartz forks oscillating in isotopically pure He-4 in the T -> 0 limit (en)
skos:notation	RIV/00216208:11320/12:10130470!RIV13-MSM-11320___
http://linked.open...avai/predkladatel	Matematicko-fyzikální fakulta
http://linked.open...avai/riv/aktivita	I
http://linked.open...avai/riv/aktivity	I
http://linked.open...iv/cisloPeriodika	14
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Skrbek, Ladislav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	124631
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/12:10130470
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	sound; vortex; quantum; flow; transition; turbulence; helium liquids; tuning fork; superfluid he-4; very-low temperatures (en)
http://linked.open.../riv/klicoveSlovo	vortex helium liquids superfluid he-4 very-low temperatures flow turbulence quantum sound transition tuning fork
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[BF76EF652428]
http://linked.open...i/riv/nazevZdroje	Physical Review B - Condensed Matter and Materials Physics
http://linked.open...in/vavai/riv/obor	BK
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	85
http://linked.open...iv/tvurceVysledku	Skrbek, Ladislav Efimov, V. B. Garg, Deepak Giltrow, M. McClintock, P. V. E. Vinen, W. F.
http://linked.open...ain/vavai/riv/wos	000302958900002
issn	1098-0121
number of pages	13 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevB.85.144518
http://localhost/t...ganizacniJednotka	11320
is http://linked.open...avai/riv/vysledek of	Behavior of quartz forks oscillating in isotopically pure He-4 in the T -> 0 limit

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