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Microwave multiplexing on the Keck Array

Cukierman, A. and Basu Thakur, R. and Bock, J. J. and Hui, H. and Kefeli, S. and Moncelsi, L. and Nguyen, H. T. and O’Brient, R. and Schillaci, A. and Soliman, A. and Steinbach, B. and Wandui, A. and Zhang, C. (2020) Microwave multiplexing on the Keck Array. Journal of Low Temperature Physics, 199 (3-4). pp. 858-866. ISSN 0022-2291. doi:10.1007/s10909-019-02296-2.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription ReadCube access Paper
Cukierman, A.0000-0002-7471-719X
Basu Thakur, R.0000-0002-3351-3078
Bock, J. J.0000-0002-5710-5212
Moncelsi, L.0000-0002-4242-3015
Schillaci, A.0000-0002-0512-1042
Wandui, A.0000-0002-8232-7343
Zhang, C.0000-0001-8288-5823
Additional Information:© 2019 Springer Verlag. Received 30 August 2019; Accepted 02 December 2019; Published 17 December 2019. This work was supported by the US Department of Energy, Office of Science, Contract DE-AC02-76SF00515. CY was supported by the NSF GRFP.
Group:Astronomy Department
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-76SF00515
NSF Graduate Research FellowshipUNSPECIFIED
Subject Keywords:Microwave multiplexing; BICEP; Keck Array; SMuRF; Tone tracking; CMB
Issue or Number:3-4
Record Number:CaltechAUTHORS:20190930-144824603
Persistent URL:
Official Citation:Cukierman, A., Ahmed, Z., Henderson, S. et al. Microwave Multiplexing on the Keck Array. J Low Temp Phys 199, 858–866 (2020).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98964
Deposited By: Tony Diaz
Deposited On:30 Sep 2019 21:55
Last Modified:16 Nov 2021 17:42

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