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Josephson acoustic radiation in superfluid helium. Progress report

California Univ., Berkeley, CA (United States). Dept. of Physics

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Título:
Josephson acoustic radiation in superfluid helium. Progress report
Autor: California Univ., Berkeley, CA (United States). Dept. of Physics
Assuntos: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; DOCUMENT TYPES ; ELEMENTS ; FLUIDS ; GASES ; HELIUM ; NONMETALS ; PROGRESS REPORT ; RARE GASES 665420 -- Superfluidity-- (1992-) ; SOUND WAVES ; SUPERFLUIDITY ; WAVE PROPAGATION
Notas: AD-A-280208/0/XAB
None
Descrição: The project to observe and measure Josephson acoustic radiation has begun. The most significant accomplishments in these first months are the following: A prototype cell has been designed and constructed. Various aspects of the cell have been tested. The apparatus have been designed in a modular form so that individual components can be optimized separately. The authors have developed a displacement liquid Helium pump to force superfluid through submicron apertures for times on the order of 100 seconds. The pump consists of a flexible plastic membrane which is metal coated on one side. Application of a voltage between the membrane and a nearby fixed electrode forces the membrane to move, thus pushing superfluid through the aperture.
Editor: United States
Data de criação/publicação: 1994
Idioma: Inglês

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