Reconnections of Quantized Vortex Rings in Superfluid He 4 at Very Low Temperatures

P. M. Walmsley; P. A. Tompsett; D. E. Zmeev; A. I. Golov

doi:10.1103/PhysRevLett.113.125302

Reconnections of Quantized Vortex Rings in Superfluid He 4 at Very Low Temperatures

P. M. Walmsley, P. A. Tompsett, D. E. Zmeev, A. I. Golov

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Abstract

© 2014 Published by American Physical Society.Collisions in a beam of unidirectional quantized vortex rings of nearly identical radii R in superfluid He4 in the limit of zero temperature (0.05 K) were studied using time-of-flight spectroscopy. Reconnections between two primary rings result in secondary vortex loops of both smaller and larger radii. Discrete steps in the distribution of flight times, due to the limits on the earliest possible arrival times of secondary loops created after either one or two consecutive reconnections, are observed. The density of primary rings was found to be capped at the value 500cm-2R-1 independent of the injected density. This is due to collisions between rings causing the piling up of many other vortex rings. Both observations are in quantitative agreement with our theory.

Original language	English
Pages (from-to)	125302
Journal	Physical Review Letters
Volume	113
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.113.125302
Publication status	Published - 17 Sept 2014

Keywords

superfluid
quantum turbulence
vortex ring
reconnection

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POST-PEER-REVIEW-NON-PUBLISHERS.PDFAccepted author manuscript, 493 KBLicence: CC BY
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Cite this

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title = "Reconnections of Quantized Vortex Rings in Superfluid He 4 at Very Low Temperatures",

abstract = "{\textcopyright} 2014 Published by American Physical Society.Collisions in a beam of unidirectional quantized vortex rings of nearly identical radii R in superfluid He4 in the limit of zero temperature (0.05 K) were studied using time-of-flight spectroscopy. Reconnections between two primary rings result in secondary vortex loops of both smaller and larger radii. Discrete steps in the distribution of flight times, due to the limits on the earliest possible arrival times of secondary loops created after either one or two consecutive reconnections, are observed. The density of primary rings was found to be capped at the value 500cm-2R-1 independent of the injected density. This is due to collisions between rings causing the piling up of many other vortex rings. Both observations are in quantitative agreement with our theory.",

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author = "Walmsley, {P. M.} and Tompsett, {P. A.} and Zmeev, {D. E.} and Golov, {A. I.}",

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doi = "10.1103/PhysRevLett.113.125302",

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T1 - Reconnections of Quantized Vortex Rings in Superfluid He 4 at Very Low Temperatures

AU - Walmsley, P. M.

AU - Tompsett, P. A.

AU - Zmeev, D. E.

AU - Golov, A. I.

PY - 2014/9/17

Y1 - 2014/9/17

N2 - © 2014 Published by American Physical Society.Collisions in a beam of unidirectional quantized vortex rings of nearly identical radii R in superfluid He4 in the limit of zero temperature (0.05 K) were studied using time-of-flight spectroscopy. Reconnections between two primary rings result in secondary vortex loops of both smaller and larger radii. Discrete steps in the distribution of flight times, due to the limits on the earliest possible arrival times of secondary loops created after either one or two consecutive reconnections, are observed. The density of primary rings was found to be capped at the value 500cm-2R-1 independent of the injected density. This is due to collisions between rings causing the piling up of many other vortex rings. Both observations are in quantitative agreement with our theory.

AB - © 2014 Published by American Physical Society.Collisions in a beam of unidirectional quantized vortex rings of nearly identical radii R in superfluid He4 in the limit of zero temperature (0.05 K) were studied using time-of-flight spectroscopy. Reconnections between two primary rings result in secondary vortex loops of both smaller and larger radii. Discrete steps in the distribution of flight times, due to the limits on the earliest possible arrival times of secondary loops created after either one or two consecutive reconnections, are observed. The density of primary rings was found to be capped at the value 500cm-2R-1 independent of the injected density. This is due to collisions between rings causing the piling up of many other vortex rings. Both observations are in quantitative agreement with our theory.

KW - superfluid

KW - quantum turbulence

KW - vortex ring

KW - reconnection

U2 - 10.1103/PhysRevLett.113.125302

DO - 10.1103/PhysRevLett.113.125302

M3 - Article

SN - 0031-9007

VL - 113

SP - 125302

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

ER -

Reconnections of Quantized Vortex Rings in Superfluid He 4 at Very Low Temperatures

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