In-focal-plane SQUID multiplexer

Published

July 11, 2003

Author(s)

Kent D. Irwin, Damian Audley, James A. Beall, Joern Beyer, Steven Deiker, W.Bertrand (Randy) Doriese, William Duncan, Gene C. Hilton, Wayne Holland, Joel Ullom, Leila R. Vale, Yizi Xu

Abstract

Superconducting quantum interference device (SQUID) multiplexers make it possible to build arrays of thousands of low-temperature microcalorimeters and bolometers based on superconducting transition-edge sensors (TES) with a manageable number of readout channels. Previous to this work, TES arrays were multiplexed by extracting leads from each pixel to multiplexer filter and switching elements outside of the focal plane. As the number of pixels is increased in a close-packed array, it becomes difficult to route the leads to the multiplexer. We report on the development of an in-focal-plane SQUID multiplexer to solve this problem. In this circuit, the filter and switching elements associated with each pixel fit within the pixel area so that signals are multiplexed before being extracted from the focal plane. This in-focal-plane architecture will first be used in the SCUBA-2 instrument at the James Clerk Maxwell Telescope in 2006.

Citation

Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment

Pub Type

Journals

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Keywords

bolometer, microcalorimeter, multiplexer, transition-edge sensor, SQUID

Citation

Irwin, K. , Audley, D. , Beall, J. , Beyer, J. , Deiker, S. , Doriese, W. , Duncan, W. , Hilton, G. , Holland, W. , Ullom, J. , Vale, L. and Xu, Y. (2003), In-focal-plane SQUID multiplexer, Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31409 (Accessed October 10, 2025)