Sound-modulated flow of superfluid Helium through a small orifice : an attempt to observe the ac Josephson Effect

Leiderer, Paul; Pobell, Frank

Sound-modulated flow of superfluid Helium through a small orifice : an attempt to observe the ac Josephson Effect

Dateien

008_physrevA_1973.pdfGröße: 1.85 MBDownloads: 332

Datum

1973

Autor:innen

Leiderer, Paul

Pobell, Frank

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review A. 1973, 7(3), pp. 1130-1134. Available under: doi: 10.1103/PhysRevA.7.1130

Zusammenfassung

Two chambers filled with superfluid helium to different levels were connected by a small orifice (10-15 μm). The flow of the liquid through the orifice was modulated by a sound field. With one experimental apparatus only a continuous flow was observed. With a modified apparatus it was possible to obtain stable states with no net flow at finite level differences between the baths. The spacing between these states is inversely proportional to the sound frequency. It depends on the total height of the liquid in one of the baths and not on the level difference between them. We conclude that the stable states of zero flow result from ultrasonic standing waves of the superfluid in one of the chambers. A phase coupling or Josephson effect can be excluded as an explanation for these states.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

LEIDERER, Paul, Frank POBELL, 1973. Sound-modulated flow of superfluid Helium through a small orifice : an attempt to observe the ac Josephson Effect. In: Physical Review A. 1973, 7(3), pp. 1130-1134. Available under: doi: 10.1103/PhysRevA.7.1130

BibTex

@article{Leiderer1973Sound-5236,
  year={1973},
  doi={10.1103/PhysRevA.7.1130},
  title={Sound-modulated flow of superfluid Helium through a small orifice : an attempt to observe the ac Josephson Effect},
  number={3},
  volume={7},
  journal={Physical Review A},
  pages={1130--1134},
  author={Leiderer, Paul and Pobell, Frank}
}

RDF

<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/5236">
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T14:54:15Z</dcterms:available>
    <dc:format>application/pdf</dc:format>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T14:54:15Z</dc:date>
    <dcterms:abstract xml:lang="eng">Two chambers filled with superfluid helium to different levels were connected by a small orifice (10-15 μm). The flow of the liquid through the orifice was modulated by a sound field. With one experimental apparatus only a continuous flow was observed. With a modified apparatus it was possible to obtain stable states with no net flow at finite level differences between the baths. The spacing between these states is inversely proportional to the sound frequency. It depends on the total height of the liquid in one of the baths and not on the level difference between them. We conclude that the stable states of zero flow result from ultrasonic standing waves of the superfluid in one of the chambers. A phase coupling or Josephson effect can be excluded as an explanation for these states.</dcterms:abstract>
    <dcterms:rights rdf:resource="http://creativecommons.org/licenses/by-nc-nd/2.0/"/>
    <dc:contributor>Pobell, Frank</dc:contributor>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/5236/1/008_physrevA_1973.pdf"/>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/5236/1/008_physrevA_1973.pdf"/>
    <dc:language>eng</dc:language>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/5236"/>
    <dc:rights>Attribution-NonCommercial-NoDerivs 2.0 Generic</dc:rights>
    <dc:creator>Pobell, Frank</dc:creator>
    <dcterms:issued>1973</dcterms:issued>
    <dc:creator>Leiderer, Paul</dc:creator>
    <dcterms:title>Sound-modulated flow of superfluid Helium through a small orifice : an attempt to observe the ac Josephson Effect</dcterms:title>
    <dc:contributor>Leiderer, Paul</dc:contributor>
    <dcterms:bibliographicCitation>First publ. in: Physical Review A 7 (1973), 3, pp.1130-1134</dcterms:bibliographicCitation>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
  </rdf:Description>
</rdf:RDF>

Universitätsbibliographie

Nein