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.
@article{arxiv.1008.5106,
title = {Time-division SQUID multiplexers with reduced sensitivity to external magnetic fields},
author = {G. M. Stiehl and H. M. Cho and G. C. Hilton and K. D. Irwin and J. A. B. Mates and C. D. Reintsema and B. L. Zink},
journal= {arXiv preprint arXiv:1008.5106},
year = {2015}
}
Comments
4 pages, 7 figures. Submitted for publication in the IEEE Transactions on Applied Superconductivity, August 2010