Abstract
We study optimization of the slew rate of SQUID (Superconducting QUantum Interference Device) systems both theoretically and experimentally. Considering the total equivalent noise flux input in the SQUID, both for SQUID electronics with one pole and for electronics with two poles and one zero, we get new formulas for slew rate and find the optimum bandwidth for the maximum slew rate. For SQUID electronics with one pole, the optimum bandwidth and corresponding maximum slew rate are both proportional to S Φ −1. While for systems with two poles and one zero, the optimum bandwidth and corresponding maximum slew rate are proportional to S Φ −1 and S Φ −2 respectively. The SQUID sensors and a multi flux quanta electronic simulator are used in the experiment and the results are in good agreement with analysis.
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