학술논문
The Simons Observatory 220 and 280 GHz Focal-Plane Module: Design and Initial Characterization.
Document Type
Article
Author
Healy, Erin; Dutcher, Daniel; Atkins, Zachary; Austermann, Jason; Choi, Steve K.; Duell, Cody J.; Duff, Shannon; Galitzki, Nicholas; Huber, Zachary B.; Hubmayr, Johannes; Johnson, Bradley R.; McCarrick, Heather; Niemack, Michael D.; Sonka, Rita; Staggs, Suzanne T.; Vavagiakis, Eve; Wang, Yuhan; Xu, Zhilei; Zheng, Kaiwen
Source
Subject
*OBSERVATORIES
*FOCAL planes
*COSMIC background radiation
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*
Language
ISSN
0022-2291
Abstract
The Simons Observatory (SO) will detect and map the temperature and polarization of the millimeter-wavelength sky from Cerro Toco, Chile, across a range of angular scales, providing rich data sets for cosmological and astrophysical analysis. The SO focal planes will be tiled with compact hexagonal packages, called universal focal-plane modules (UFMs), in which the transition-edge sensor (TES) detectors are coupled to 100 mK microwave-multiplexing electronics. Three different types of dichroic TES detector arrays with bands centered at 30/40, 90/150, and 220/280 GHz will be implemented across the 49 planned UFMs. The 90/150 GHz and 220/280 GHz arrays each contain 1764 TESes, which are read out with two 910x multiplexer circuits. The modules contain a series of routed silicon chips, which are packaged together in a controlled electromagnetic environment and operated at 100 mK. Following an overview of the module design, we report on early results from the first 220/280 GHz UFM, including detector yield, as well as readout and detector noise levels. [ABSTRACT FROM AUTHOR]