학술논문
The Simons Observatory Microwave SQUID Multiplexing Detector Module Design
Document Type
article
Author
McCarrick, Heather; Healy, Erin; Ahmed, Zeeshan; Arnold, Kam; Atkins, Zachary; Austermann, Jason E; Bhandarkar, Tanay; Beall, James A; Bruno, Sarah Marie; Choi, Steve K; Connors, Jake; Cothard, Nicholas F; Crowley, Kevin D; Dicker, Simon; Dober, Bradley; Duell, Cody J; Duff, Shannon M; Dutcher, Daniel; Frisch, Josef C; Galitzki, Nicholas; Gralla, Megan B; Gudmundsson, Jon E; Henderson, Shawn W; Hilton, Gene C; Ho, Shuay-Pwu Patty; Huber, Zachary B; Hubmayr, Johannes; Iuliano, Jeffrey; Johnson, Bradley R; Kofman, Anna M; Kusaka, Akito; Lashner, Jack; Lee, Adrian T; Li, Yaqiong; Link, Michael J; Lucas, Tammy J; Lungu, Marius; Mates, JAB; McMahon, Jeffrey J; Niemack, Michael D; Orlowski-Scherer, John; Seibert, Joseph; Silva-Feaver, Maximiliano; Simon, Sara M; Staggs, Suzanne; Suzuki, Aritoki; Terasaki, Tomoki; Thornton, Robert; Ullom, Joel N; Vavagiakis, Eve M; Vale, Leila R; Van Lanen, Jeff; Vissers, Michael R; Wang, Yuhan; Wollack, Edward J; Xu, Zhilei; Young, Edward; Yu, Cyndia; Zheng, Kaiwen; Zhu, Ningfeng
Source
The Astrophysical Journal. 922(1)
Subject
Language
Abstract
Advances in cosmic microwave background (CMB) science depend on increasing the number of sensitive detectors observing the sky. New instruments deploy large arrays of superconducting transition-edge sensor (TES) bolometers tiled densely into ever larger focal planes. High multiplexing factors reduce the thermal loading on the cryogenic receivers and simplify their design. We present the design of focal-plane modules with an order of magnitude higher multiplexing factor than has previously been achieved with TES bolometers. We focus on the novel cold readout component, which employs microwave SQUID multiplexing (μmux). Simons Observatory will use 49 modules containing 70,000 bolometers to make exquisitely sensitive measurements of the CMB. We validate the focal-plane module design, presenting measurements of the readout component with and without a prototype detector array of 1728 polarization-sensitive bolometers coupled to feedhorns. The readout component achieves a 95% yield and a 910 multiplexing factor. The median white noise of each readout channel is 65 pA/√Hz. This impacts the projected SO mapping speed by