1. Time-division SQUID multiplexers with reduced sensitivity to external magnetic fields
- Author
-
Stiehl, G. M., Cho, H. M., Hilton, G. C., Irwin, K. D., Mates, J. A. B., Reintsema, C. D., and Zink, B. L.
- Subjects
Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - Cosmology and Nongalactic Astrophysics ,Condensed Matter - Superconductivity - Abstract
Time-division SQUID multiplexers are used in many applications that require exquisite control of systematic error. One potential source of systematic error is the pickup of external magnetic fields in the multiplexer. We present measurements of the field sensitivity figure of merit, effective area, for both the first stage and second stage SQUID amplifiers in three NIST SQUID multiplexer designs. These designs include a new variety with improved gradiometry that significantly reduces the effective area of both the first and second stage SQUID amplifiers., Comment: 4 pages, 7 figures. Submitted for publication in the IEEE Transactions on Applied Superconductivity, August 2010
- Published
- 2010
- Full Text
- View/download PDF