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Recent results of a new microwave SQUID multiplexer

Show simple item record Hahn, Inseob Limketkai, B. Bumble, B. LeDuc, H. G. 2009-10-22T22:40:57Z 2009-10-22T22:40:57Z 2007-07-22
dc.identifier.citation 12th International Workshop on Low Temperature Detectors, Paris, France, July 22-27, 2007 en_US
dc.identifier.clearanceno 07-1982
dc.description.abstract We are developing a proof-of-concept microwave SQUID multiplexer containing four SQUIDs coupled to GHz frequency resonant circuits and fed with a single microwave readout line. The resonators are half-wave coplanar waveguide sections and are similar to the structures used for the microwave kinetic inductance detectors developed in our group. Optimal values for the interdigital gap capacitors were determined to maximize the sensitivity of the transmitted and reflected microwave signal with respect to changes in the dynamic resistance of the SQUID. The dc current-bias line for the SQUID has an in-line inductive high frequency filter to minimize coupling between the bias line and resonator. A high frequency modulation scheme is proposed to eliminate the need for individual flux biasing of the SQUIDs, which extends the dynamic range of the readout. In this scheme a common modulation signal is imposed on each SQUID and the received signal is demodulated at one and two times the modulation frequency to maintain sensitivity at any flux state. We present the recent results of the microwave SQUID multiplexer system operating at a readout frequency range of 10 - 11GHz. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2007. en_US
dc.subject superconducting quantum interference device (SQUID) multiplexer en_US
dc.subject low temperature detector en_US
dc.subject bolometer en_US
dc.title Recent results of a new microwave SQUID multiplexer en_US
dc.type Preprint en_US

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