Demonstration of code-division multiplexing for x-ray microcalorimeters

Published

February 13, 2012

Author(s)

Greg Stiehl, W.Bertrand (Randy) Doriese, Gene C. Hilton, Kent D. Irwin, Carl D. Reintsema, Dan Schmidt, Daniel Swetz, Joel Ullom, Leila R. Vale, Joseph Fowler

Abstract

We demonstrate the code-division multiplexing (CDM) readout of eight transition-edge sensor microcalorimeters. The energy resolution is 3.0 eV (full width at half-maximum) or better at 5.9 keV, with a best resolution of 2.3 eV and a mean of 2.6 eV over the seven modulated detectors. The flux- summing CDM system is described and compared with similar time-division multiplexing (TDM) readout. We show that the √N_pixels multiplexing disadvantage associated with TDM is not present in CDM. This demonstration establishes CDM as both a simple route to higher performance in existing TDM microcalorimetric experiments and a long-term approach to reaching higher multiplexing factors.

Citation

Applied Physics Letters

Volume

100

Issue

7

Pub Type

Journals

Download Paper

https://doi.org/10.1063/1.3684807

Local Download

Keywords

SQUID multiplexers, transition-edge sensors

Citation

Stiehl, G. , Doriese, W. , Hilton, G. , Irwin, K. , Reintsema, C. , Schmidt, D. , Swetz, D. , Ullom, J. , Vale, L. and Fowler, J. (2012), Demonstration of code-division multiplexing for x-ray microcalorimeters, Applied Physics Letters, [online], https://doi.org/10.1063/1.3684807, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909972 (Accessed October 10, 2025)