Time-division multiplexing of high-resolution TES X-ray microcalotimeters: Four pixels and beyond

Published

November 15, 2004

Author(s)

W.Bertrand (Randy) Doriese, James A. Beall, Steven Deiker, William Duncan, S. L. Ferreira, Gene C. Hilton, Kent D. Irwin, Carl D. Reintsema, Joel Ullom, Leila R. Vale, Yizi Xu

Abstract

We present experimental results from a four-pixel array of transition-edge-sensor, x-ray microcalorimeters read out through a single amplifier channel via a time-division superconducting quantum interference device multiplexer. We map the dependence of the x-ray energy resolution of the microcalorimeters on multiplexer timing parameters. We achieve multiplexed, four-pixel resolution of 6.94'0.05 eV full width at half maximum of the Mn K complex near 5.9 keV, which is a degradation of only 0.44 eV from nonmultiplexed operation. An analysis of straightforward upgrades to the multiplexer predicts that a linear array of 32 of these pixels could be multiplexed with a degradation in resolution of only 0.1 eV. These results, the first demonstration of a time-division multiplexer for x-ray detectors, establish a clear path to the instrumentation of a kilopixel microcalorimeter array.

Citation

Applied Physics Letters

Volume

85

Issue

20

Pub Type

Journals

Keywords

multiplexer, squid

Citation

Doriese, W. , Beall, J. , Deiker, S. , Duncan, W. , Ferreira, S. , Hilton, G. , Irwin, K. , Reintsema, C. , Ullom, J. , Vale, L. and Xu, Y. (2004), Time-division multiplexing of high-resolution TES X-ray microcalotimeters: Four pixels and beyond, Applied Physics Letters (Accessed October 9, 2025)