Simons Observatory Focal-Plane Module: In-lab Testing and Characterization Program

The Simons Observatory is a ground-based cosmic microwave background instrument to be sited in the Atacama Desert in Chile. SO will deploy 60,000 transition-edge sensors (TES) bolometers in 49 separate focal-plane modules across a suite of four telescopes covering three dichroic bands termed low fre...

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Bibliographic Details
Published in:Journal of low temperature physics 2022-12, Vol.209 (5-6), p.944-952
Main Authors: Wang, Yuhan, Zheng, Kaiwen, Atkins, Zachary, Austermann, Jason, Bhandarkar, Tanay, Choi, Steve K., Duff, Shannon M., Dutcher, Daniel, Galitzki, Nicholas, Healy, Erin, Huber, Zachary B., Hubmayr, Johannes, Johnson, Bradley R., Lashner, Jack, Li, Yaqiong, McCarrick, Heather, Niemack, Michael D., Seibert, Joseph, Silva-Feaver, Maximiliano, Sonka, Rita, Staggs, Suzanne T., Vavagiakis, Eve, Xu, Zhilei
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Cosmic microwave background
Focal plane
Ground-based observation
Low temperature physics
Magnetic Materials
Magnetism
Modules
Multiplexing
Optical properties
Physics
Physics and Astronomy
Telescopes
Ultrahigh frequencies
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Summary:The Simons Observatory is a ground-based cosmic microwave background instrument to be sited in the Atacama Desert in Chile. SO will deploy 60,000 transition-edge sensors (TES) bolometers in 49 separate focal-plane modules across a suite of four telescopes covering three dichroic bands termed low frequency (LF), mid-frequency and ultra-high frequency. Each MF and UHF focal-plane module packages 1720 feedhorn-coupled detectors with cryogenic components for highly multiplexed readout using microwave SQUID multiplexing. In this paper, we describe the testing program we have developed for high-throughput validation of modules after they are assembled. The validation requires measurements of the yield, saturation powers, time constants, noise properties and optical efficiencies. Additional measurements will be performed for further characterization as needed. We describe the methods developed and demonstrate preliminary results from the initial testing of a prototype module.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-022-02870-1