@inproceedings{6851d86c2a84490487d22b0c2ba3e2c0,
title = "Simons Observatory focal-plane module: Detector re-biasing with bias-step measurements",
abstract = "The Simons Observatory is a ground-based cosmic microwave background survey experiment that consists of three 0.5 m small-Aperture telescopes and one 6 m large-Aperture telescope, sited at an elevation of 5200 m in the Atacama Desert in Chile. SO will deploy 60,000 transition-edge sensor (TES) bolometers in 49 separate focal-plane modules across a suite of four telescopes covering 30/40 GHz low frequency (LF), 90/150 GHz mid frequency (MF), and 220/280 GHz ultra-high frequency (UHF). Each MF and UHF focal-plane module packages 1720 optical detectors spreading across 12 detector bias lines that provide voltage biasing to the detectors. During observation, detectors are subject to varying atmospheric emission and hence need to be re-biased accordingly. The re-biasing process includes measuring the detector properties such as the TES resistance and responsivity in a fast manner. Based on the result, detectors within one bias line then are biased with suitable voltage. Here we describe a technique for re-biasing detectors in the modules using the result from bias-step measurement.",
keywords = "TES bolometers, cosmic microwave background, microwave SQUID multiplexing",
author = "Yuhan Wang and Tanay Bhandarkar and Choi, {Steve K.} and Crowley, {Kevin T.} and Duff, {Shannon M.} and Daniel Dutcher and John Groh and Kathleen Harrington and Erin Healy and Bradley Johnson and Jack Lashner and Yaqiong Li and Max Silva-Feaver and Rita Sonka and Staggs, {Suzanne T.} and Samantha Walker and Kaiwen Zheng",
note = "Publisher Copyright: {\textcopyright} 2022 SPIE.; Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022 ; Conference date: 17-07-2022 Through 22-07-2022",
year = "2022",
doi = "10.1117/12.2630135",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Jonas Zmuidzinas and Jian-Rong Gao",
booktitle = "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI",
address = "United States",
}