Quantum Interferometer
Abstract
The development and applications of superconducting quantum devices, and the limitations imposed by thermal and environmental noise are reported. Several types of stable point-contact niobium devices were developed for use as uhf heterodyne detectors, millimeter-wave video detectors, uhf mixers, vlf detectors, magnetometers, and for a number of other uses. As magnetometers these devices provide sensitivities as high as 10 to the -9th power gauss in compact, portable instruments. With such an instrument magnetocardiography has been put on a level comparable to electrocardiography. Experiments with a terrestrial magnetic gradiometer demonstrate the possibility of achieving gradient sensitivities of 10 to the -10th power gauss/cm for magnetic anomaly detection, and it is likely that subsequent developments will realize sensitivities at least one or two orders of magnitude better than this.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 16, 1970
- Accession Number
- AD0864561
Entities
People
- James E. Zimmerman
- Paul Thiene