The Simons Observatory (SO) is a ground-based cosmic microwave background instrument to be sited in the Atacama Desert in Chile. SO will deploy 60,000 transition-edge sensor bolometers in 49 separate focal-plane modules across a suite of four telescopes covering three dichroic bands termed low frequency (LF), mid frequency (MF) and ultra-high frequency (UHF). Each MF and UHF focal-plane module packages 1720 optical detectors and corresponding 100 mK microwave SQUID multiplexing readout components. In this paper we describe the testing program we have developed for high-throughput validation of the 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 characterizations as needed. We describe the methods developed and demonstrate preliminary results from initial testing of prototype modules.
@article{arxiv.2111.11301,
title = {Simons Observatory Focal-Plane Module: In-lab Testing and Characterization Program},
author = {Yuhan Wang and Kaiwen Zheng and Zachary Atkins and Jason Austermann and Tanay Bhandarkar and Steve K. Choi and Shannon M. Duff and Daniel Dutcher and Nicholas Galitzki and Erin Healy and Zachary B. Huber and Johannes Hubmayr and Bradley R. Johnson and Jack Lashner and Yaqiong Li and Heather McCarrick and Michael D. Niemack and Joseph Seibert and Maximiliano Silva-Feaver and Rita Sonka and Suzanne T. Staggs and Eve Vavagiakis and Zhilei Xu},
journal= {arXiv preprint arXiv:2111.11301},
year = {2023}
}