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TES Detector Noise Limited Readout Using SQUID Multiplexers



Johannes G. Staguhn, C. A. Allen, D. J. Benford, James A. Chervenak, M. M. Freund, S. A. Khan, A. S. Kutyrev, S. H. Mosely, Rick A. Shafer, Steven Deiker, Erich N. Grossman, Gene C. Hilton, Kent D. Irwin, John M. Martinis, Sae Woo Nam, David A. Rudman, David A. Wollman


The availability of superconducting Transition Edge Sensors (TES) with large numbers of individual detector pixels requires multiplexers for efficient readout. The usage of multiplexers limits the number of wires needed between the cryogenic electronics and the room temperature electronics and limits the number of required cryogenic amplifiers. We are using an 8 channel SQUID multiplexer to read out one dimensional TES arrays which are used for submillimeter astronomical observations. We present results from test measurements which show that the low noise level of the SQUID multiplexers allows accurate measurements of the TES Johnson noise, and that in operation, the SQUID noise is dominated by the detector noise. Multiplexers for large number of channels require a large bandwith for the multiplexed readout signal. We discuss the resulting implications for the noise performance of these multiplexers which will be used for the readout of two dimensional TES arrays in next generation instruments.
Proceedings Title
Proc., 9th Intl Wkshp on Low Temp. Detectors (LTD)
AIP 605
Conference Dates
July 22-29, 2001
Conference Location
Madison, WI, USA


multiplexers, SQUID, superconducting, transition edge sensors


Staguhn, J. , Allen, C. , Benford, D. , Chervenak, J. , Freund, M. , Khan, S. , Kutyrev, A. , Mosely, S. , Shafer, R. , Deiker, S. , Grossman, E. , Hilton, G. , Irwin, K. , Martinis, J. , Nam, S. , Rudman, D. and Wollman, D. (2002), TES Detector Noise Limited Readout Using SQUID Multiplexers, Proc., 9th Intl Wkshp on Low Temp. Detectors (LTD), Madison, WI, USA (Accessed February 27, 2024)
Created December 31, 2001, Updated October 12, 2021