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arXiv · 1806.02805

A Spread-Spectrum SQUID Multiplexer

K. D. Irwin·S. Chaudhuri·H. -M. Cho·C. Dawson·S. Kuenstner·D. Li·C. J. Titus·B. A. Young
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Abstract

The Transition-Edge Sensors (TES) is a mature, high-resolution x-ray spectrometer technology that provides a much higher efficiency than dispersive spectrometers such as gratings and crystal spectrometers. As larger arrays are developed, time-division multiplexing schemes operating at MHz frequencies are being replaced by microwave SQUID multiplexers using frequency-division multiplexing at GHz frequencies. However, the multiplexing factor achievable with microwave SQUIDs is limited by the high slew rate on the leading edge of x-ray pulses. In this paper, we propose a new multiplexing scheme for high-slew-rate TES x-ray calorimeters: the spread-spectrum SQUID multiplexer, which has the potential to enable higher multiplexing factors, especially in applications with lower photon arrival rates.

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K. D. Irwin, S. Chaudhuri, H. -M. Cho, C. Dawson, S. Kuenstner, D. Li, C. J. Titus, B. A. Young. 2018-06-07. A Spread-Spectrum SQUID Multiplexer. https://doi.org/10.1007/s10909-018-1987-z

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