Simons Observatory Focal-Plane Module: Detector Re-biasing With Bias-step Measurements
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) bolom...
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Main Authors | , , , , , , , , , , , , , , , , |
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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. |
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AbstractList | SPIE 12190, Millimeter, Submillimeter, and Far-Infrared Detectors
and Instrumentation for Astronomy XI, 121901I (2022) 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. 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. |
Author | Lashner, Jack Silva-Feaver, Max Crowley, Kevin T Walker, Samantha Dutcher, Daniel Choi, Steve K Duff, Shannon M Staggs, Suzanne T Li, Yaqiong Healy, Erin Wang, Yuhan Johnson, Bradley Harrington, Kathleen Zheng, Kaiwen Groh, John Sonka, Rita Bhandarkar, Tanay |
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BackLink | https://doi.org/10.1117/12.2630135$$DView published paper (Access to full text may be restricted) https://doi.org/10.48550/arXiv.2208.05997$$DView paper in arXiv |
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Snippet | 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... SPIE 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, 121901I (2022) The Simons Observatory is a ground-based... |
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SubjectTerms | Apertures Bias Cosmic microwave background Detectors Electric potential Focal plane Ground-based observation Modules Observatories Physics - Instrumentation and Methods for Astrophysics Sensors Telescopes Ultrahigh frequencies Voltage |
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Title | Simons Observatory Focal-Plane Module: Detector Re-biasing With Bias-step Measurements |
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