Coupling Considerations for Squid Devices.
Abstract
Most applications of superconducting quantum interference devices (SQUIDs) involve use of a coupling coil. There are two classes of such applications: magnetometry (magnetic field, field gradient) and voltage or current measurements. The author has analyzed the factors which determine the ultimate sensitivity, and presents a guide for optimization of signal/noise in each of the two cases. It is found that a single figure of merit, involving both the equivalent input noise of the SQUID and the effectiveness of the coupling to the coil, is applicable to either type of measurement. It is proposed that this figure of merit be used in evaluating the performance of new SQUID designs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 1975
- Accession Number
- ADA006324
Entities
People
- J. H. Claassen
Organizations
- Cornell University