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Optimization and analysis of code-division multiplexed TES microcalorimeters

Published

Author(s)

Joseph W. Fowler, William B. Doriese, Gene C. Hilton, Kent D. Irwin, Daniel R. Schmidt, Greg Stiehl, Daniel S. Swetz, Joel N. Ullom, Leila R. Vale

Abstract

We are developing code-division multiplexing (CDM) readout systems for TES arrays for good scalability to large multiplexing factors. We report high energy resolution x-ray measurements made through four-channel CDM that employ a flux-summing architecture, emphasizing data analysis issues. We describe an empirical method to determine the demodulation matrix to minimize cross-talk. All resolutions are estimated with a full maximum-likelihood fit to energy histogram,avoiding the bias towards good resolution that arises in simpler chi-squared fits. The present CDM system has achieved energy resolutions of between 2.3 and 3.0 eV FWHM at 6 keV.
Proceedings Title
Journal of Low Temperature Physics
Volume
167
Issue
5-6
Conference Dates
August 1-5, 2011
Conference Location
Heidelberg
Conference Title
Low Temperature Detectors 14

Keywords

SQUID multiplexers, transition edge sensors

Citation

Fowler, J. , Doriese, W. , Hilton, G. , Irwin, K. , Schmidt, D. , Stiehl, G. , Swetz, D. , Ullom, J. and Vale, L. (2012), Optimization and analysis of code-division multiplexed TES microcalorimeters, Journal of Low Temperature Physics, Heidelberg, -1, [online], https://doi.org/10.1007/s10909-012-0463-4 (Accessed July 22, 2024)

Issues

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Created January 20, 2012, Updated November 10, 2018