Large arrays of cryogenic detectors, including transition-edge sensors (TESs) or magnetic micro-calorimeters (MMCs), are needed for future experiments across a wide range of applications. Complexities in integration and cryogenic wiring have driven efforts to develop cryogenic readout technologies with large multiplexing factors while maintaining minimal readout noise. One such example is the microwave SQUID multiplexer (μmux), which couples an incoming TES or magnetic calorimeter signal to a unique GHz-frequency resonance that is modulated in frequency. Here, we present a hybrid scheme combining the microwave SQUID multiplexer with code division multiplexing: the impedance-modulated code-division multiplexer (Z-CDM), which may enable an order of magnitude increase in multiplexing factor particularly for low-bandwidth signal applications.
@article{arxiv.2001.02763,
title = {An Impedance-Modulated Code-Division Microwave SQUID Multiplexer},
author = {C. Yu and A. Ames and S. Chaudhuri and C. Dawson and K. D. Irwin and S. E. Kuenstner and D. Li and C. J. Titus},
journal= {arXiv preprint arXiv:2001.02763},
year = {2020}
}
Comments
10 pages including references, 3 figures; submitted to Engineering Research Express