Conceptual design of the modular detector and readout system for the CMB-S4 survey experiment

Barron, Darcy, Ahmed, Zeeshan, Aguilar, Jessica, Anderson, Adam, Baker, Carina, Barry, Peter, Beall, James, Bender, Amy, Benson, Bradford, Besuner, Robert, Cecil, Thomas, Chang, Clarence, Chapman, Scott, Chesmore, Grace, Derylo, Greg, Doriese, W. Bertrand, Duff, Shannon, Elleflot, Tucker, Filippini, Jeffrey, Flaugher, Brenna, Gomez, Jillian, Grimes, Paul, Gualtieri, Riccardo, Gullett, Ian, Haller, Gunther, Henderson, Shawn, Henke, Douglas, Herbst, Ryan, Huber, Anthony, Hubmayr, Johannes, Jonas, Michelle, Joseph, John, King, Cesiley, Kovac, John, Kubik, Donna, Lisovenko, Marharyta, McMahon, Jeffrey, Moncelsi, Lorenzo, Nagy, Johanna, Osherson, Benjamin, Reese, Benjamin, Ruhl, John, Sapozhnikov, Leonid, Schillaci, Alessandro, Simon, Sara, Suzuki, Aritoki, Wang, Gensheng, Westbrook, Benjamin, Yefremenko, Vladimir, Zhang, Jianjie, Zmuidzinas, Jonas and Gao, Jian-Rong 2022. Conceptual design of the modular detector and readout system for the CMB-S4 survey experiment. Presented at: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, Montreal, Canada, 17-23 July 2022. Proceedings Volume 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI. , vol.12190 SPIE, 10.1117/12.2630494

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Abstract

We present the conceptual design of the modular detector and readout system for the Cosmic Microwave Background – Stage four (CMB-S4) ground-based survey experiment. CMB-S4 will map the cosmic microwave background (CMB) and the millimeter-wave sky to unprecedented sensitivity, using 500,000 superconducting detectors observing from Chile and Antarctica to map over 60% of the sky. The fundamental building block of the detector and readout system is a detector module package operated at 100 mK, which is connected to a readout and amplification chain that carries signals out to room temperature. It uses arrays of feedhorn-coupled orthomode transducers (OMT) that collect optical power from the sky onto dc-voltage-biased transition-edge sensor (TES) bolometers. The resulting current signal in the TESs is then amplified by a two-stage cryogenic Superconducting Quantum Interference Device (SQUID) system with a time-division multiplexer to reduce wire count, and matching room-temperature electronics to condition and transmit signals to the data acquisition system. Sensitivity and systematics requirements are being developed for the detector and readout system over wide range of observing bands (20 to 300 GHz) and optical powers to accomplish CMB-S4’s science goals. While the design incorporates the successes of previous generations of CMB instruments, CMB-S4 requires an order of magnitude more detectors than any prior experiment. This requires fabrication of complex superconducting circuits on over 10 m2 of silicon, as well as significant amounts of precision wiring, assembly and cryogenic testing

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	SPIE
ISBN:	9781510653627
ISSN:	0277-786X
Last Modified:	13 Jan 2023 12:30
URI:	https://orca.cardiff.ac.uk/id/eprint/155684

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