Simons Observatory focal-plane module: Detector re-biasing with bias-step measurements

Yuhan Wang, Tanay Bhandarkar, Steve K. Choi, Kevin T. Crowley, Shannon M. Duff, Daniel Dutcher, John Groh, Kathleen Harrington, Erin Healy, Bradley Johnson, Jack Lashner, Yaqiong Li, Max Silva-Feaver, Rita Sonka, Suzanne T. Staggs, Samantha Walker, Kaiwen Zheng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publicationMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI
EditorsJonas Zmuidzinas, Jian-Rong Gao
PublisherSPIE
ISBN (Electronic)9781510653610
DOIs
StatePublished - 2022
EventMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022 - Montreal, Canada
Duration: Jul 17 2022Jul 22 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12190
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022
Country/TerritoryCanada
CityMontreal
Period7/17/227/22/22

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • TES bolometers
  • cosmic microwave background
  • microwave SQUID multiplexing

Fingerprint

Dive into the research topics of 'Simons Observatory focal-plane module: Detector re-biasing with bias-step measurements'. Together they form a unique fingerprint.

Cite this