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



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


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.
Applied Physics Letters


multiplexer, squid


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 July 15, 2024)


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Created November 14, 2004, Updated October 12, 2021