Conceptual Design of the Modular Detector and Readout System for the CMB-S4 survey experiment

Autor: Darcy Barron, Zeeshan Ahmed, Jessica Aguilar, Adam Anderson, Carina Baker, Peter Barry, James Beall, Amy Bender, Bradford Benson, Robert Besuner, Thomas Cecil, Clarence Chang, Scott Chapman, Grace Chesmore, Greg Derylo, W. Bertrand Doriese, Shannon Duff, Tucker Elleflot, Jeffrey Filippini, Brenna Flaugher, Jillian Gomez, Paul Grimes, Riccardo Gualtieri, Ian Gullett, Gunther Haller, Shawn Henderson, Douglas Henke, Ryan Herbst, Anthony Huber, Johannes Hubmayr, Michelle Jonas, John Joseph, Cesiley King, John Kovac, Donna Kubik, Marharyta Lisovenko, Jeffrey McMahon, Lorenzo Moncelsi, Johanna Nagy, Benjamin Osherson, Benjamin Reese, John Ruhl, Leonid Sapozhnikov, Alessandro Schillaci, Sara Simon, Aritoki Suzuki, Gensheng Wang, Benjamin Westbrook, Vladimir Yefremenko, Jianjie Zhang
Rok vydání: 2022
Předmět:
DOI: 10.48550/arxiv.2208.02284
Popis: We present the conceptual design of the modular detector and readout system for the Cosmic Microwave Background Stage 4 (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 percent 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 a 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 square meters of silicon, as well as significant amounts of precision wiring, assembly and cryogenic testing.
Comment: 25 pages, 15 figures, presented at and published in the proceedings of SPIE Astronomical Telescopes and Instrumentation 2022
Databáze: OpenAIRE
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