Josephson Acoustic Radiation in Superfluid Helium.
Abstract
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. We have developed a displacement liquid Helium pump to force superfluid through a 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1994
- Accession Number
- ADA280208
Entities
Organizations
- University of California, Berkeley