Microwave multiplexing on the Keck Array
Abstract
We describe an on-sky demonstration of a microwave-multiplexing readout system in one of the receivers of the Keck Array, a polarimetry experiment observing the cosmic microwave background at the South Pole. During the austral summer of 2018-2019, we replaced the time-division multiplexing readout system with microwave-multiplexing components including superconducting microwave resonators coupled to radio-frequency superconducting quantum interference devices at the sub-Kelvin focal plane, coaxial-cable plumbing and amplification between room temperature and the cold stages, and a SLAC Microresonator Radio Frequency system for the warm electronics. In the range 5-6 GHz, a single coaxial cable reads out 528 channels. The readout system is coupled to transition-edge sensors, which are in turn coupled to 150-GHz slot-dipole phased-array antennas. Observations began in April 2019, and we report here on an initial characterization of the system performance.
Cite
@article{arxiv.1909.01305,
title = {Microwave multiplexing on the Keck Array},
author = {Ari Cukierman and Zeeshan Ahmed and Shawn Henderson and Edward Young and Cyndia Yu and Denis Barkats and David Brown and Saptarshi Chaudhuri and James Cornelison and John M. D'Ewart and Marion Dierickx and Bradley J. Dober and John Dusatko and Sofia Fatigoni and Jeff P. Filippini and Josef C. Frisch and Gunther Haller and Mark Halpern and Gene C. Hilton and Johannes Hubmayr and Kent D. Irwin and Kirit S. Karkare and Ethan Karpel and Sarah A. Kernasovskiy and John M. Kovac and Attila Kovacs and Stephen E. Kuenstner and Chao-Lin Kuo and Dale Li and John A. B. Mates and Stephen Smith and Tyler St. Germaine and Joel N. Ullom and Leila R. Vale and Daniel D. Van Winkle and Jesus Vasquez and Justin Willmert and Lingzhen Zeng and P. A. R. Ade and M. Amiri and R. Basu Thakur and C. A. Bischoff and J. J. Bock and H. Boenish and E. Bullock and V. Buza and J. Cheshire and J. Connors and M. Crumrine and L. Duband and G. Hall and S. Harrison and S. R. Hildebrandt and H. Hui and J. Kang and S. Kefeli and K. Lau and K. G. Megerian and L. Moncelsi and T. Namikawa and H. T. Nguyen and R. O'Brient and S. Palladino and C. Pryke and B. Racine and C. D. Reintsema and S. Richter and A. Schillaci and R. Schwarz and C. D. Sheehy and A. Soliman and B. Steinbach and R. V. Sudiwala and K. L. Thompson and C. Tucker and A. D. Turner and C. Umilta and A. G. Vieregg and A. Wandui and A. C. Weber and D. V. Wiebe and W. L. K. Wu and H. Yang and K. W. Yoon and C. Zhang},
journal= {arXiv preprint arXiv:1909.01305},
year = {2020}
}
Comments
9 pages, 11 figures, Accepted by the Journal of Low Temperature Physics (Proceedings of the 18th International Workshop on Low Temperature Detectors)