Assembly and Integration Process of the High-Density Detector Array Readout Modules for the Simons Observatory

Yaqiong Li, Kam Arnold, Zachary Atkins, Sarah Marie Bruno, Nicholas F. Cothard, Bradley Dober, Cody J. Duell, Shannon M. Duff, Patricio A. Gallardo, Erin Healy, Shuay Pwu Patty Ho, Johannes Hubmayr, Brian Keating, Adrian T. Lee, Aashrita Mangu, Heather McCarrick, Michael D. Niemack, Laura Newburgh, Christopher Raum, Maria SalatinoTrevor Sasse, Maximiliano Silva-Feaver, Sara M. Simon, Suzanne Staggs, Aritoki Suzuki, Joel Ullom, Eve M. Vavagiakis, Michael R. Vissers, Yuhan Wang, Benjamin Westbrook, Edward J. Wollack, Zhilei Xu, Kaiwen Zheng, Ningfeng Zhu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The Simons Observatory will measure the cosmic microwave background temperature and polarization using a suite of new telescopes in the Atacama Desert in Chile.The Simons Observatory will use dichroic transition edge sensor (TES) bolometer arrays spanning six frequency bands from 27 to 280 GHz.The Simons Observatory will pioneer the use of a densely packed multiplexing architecture based on the microwave SQUID multiplexer (μmux), housing ∼2000 microwave resonators, each coupled to a TES. The Simons Observatory aims to multiplex each array of ∼2000 detectors with a single pair of coaxial cables and requires a multiplexing factor of ∼1000. The Simons Observatory cryogenic readout system is called the universal microwave multiplexing module (UMM). The UMM couples to both horn and lenslet-coupled detector arrays and is integrated into the universal focal-plane module (UFM) after being independently characterized. We present processes we have developed for highly repeatable and automated integration methods of UMMs, which will be needed for the production of the 49 UFMs required for the first stage of the Simons Observatory.

Original languageEnglish (US)
Pages (from-to)985-993
Number of pages9
JournalJournal of Low Temperature Physics
Issue number3-4
StatePublished - May 1 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics


  • CMB
  • Multiplexing
  • Packaging
  • Readout
  • TES bolometers


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