NASA NTRS · 20040068215
SQUID Multiplexers for Cryogenic Detector Arrays
Abstract
SQUID multiplexers make it possible to build arrays of thousands of cryogenic detectors with a manageable number of readout channels. We are developing time-division SQUID multiplexers based on Nb trilayer SQUIDs to read arrays of superconducting transition-edge sensors. Our first-generation, 8-channel SQUID multiplexer was used in FIBRE, a one-dimensional TES array for submillimeter astronomy. Our second-generation 32-pixel multiplexer, based on an improved architecture, has been developed for instruments including Constellation-X, SCUBA-2, and solar x-ray astronomy missions. SCUBA-2, which is being developed for the James Clerk Maxwell Telescope, will have more than 10,000 pixels. We are now developing a third-generation architecture based on superconducting hot-electron switches. The use of SQUID multiplexers in instruments operating at above 2 K will also be discussed.
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Irwin, Kent, Beall, James, Deiker, Steve, Doriese, Randy, Duncan, William, Hilton, Gene, Moseley, S. Harvey, Reintsema, Carl, Stahle, Caroline, Ullom, Joel, Vale, Leila. 2004-02-01. SQUID Multiplexers for Cryogenic Detector Arrays. https://ntrs.nasa.gov/citations/20040068215
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