Integrated Electrical Properties of the Frequency Multiplexed Cryogenic Readout System for Polarbear/Simons Array

Darcy Barron, Kayla Mitchell, John Groh, Kam Arnold, Tucker Elleflot, Logan Howe, Jen Ito, Adrian T. Lee, Lindsay N. Lowry, Adam Anderson, Jessica Avva, Tylor Adkins, Carlo Baccigalupi, Kolen Cheung, Yuji Chinone, Oliver Jeong, Nobu Katayama, Brian Keating, Joshua Montgomery, Haruki NishinoChristopher Raum, Praween Siritanasak, Aritoki Suzuki, Sayuri Takatori, Calvin Tsai, Benjamin Westbrook, Yuyang Zhou

Research output: Contribution to journalArticlepeer-review


Polarbear/Simons Array is a cosmic microwave background (CMB) polarization experiment, with science goals including a deep search for CMB B-mode polarization created by inflationary gravitational waves, and characterization of the CMB B-mode signal from gravitational lensing. When completed, Simons Array will have over 20,000 superconducting transition-edge sensor bolometers, cooled to 300 mK with closed-cycle cryogenics. This significant increase in detectors and sensitivity is enabled by advancements in frequency multiplexed readout. The detectors are read out with DfMux digital frequency-domain multiplexing, with 40 channels read out by each SQUID array, with frequency channels between 1 and 5 MHz defined by an inductor and capacitor in series with each detector. After the system was completed and characterized for Polarbear-2a, modifications were made that further improved performance for Polarbear-2b. We present the characterization of the integrated cryogenic readout system for Polarbear-2a and Polarbear-2b, and comparison of properties including stray impedance and frequency scatter.

Original languageEnglish
Article number9381662
JournalIEEE Transactions on Applied Superconductivity
Issue number5
Publication statusPublished - Aug 2021
Externally publishedYes


  • general detector topics
  • imaging arrays of detectors
  • instrumentation and readout of superconducting devices
  • microwave devices and components
  • millimeter
  • multiplexing
  • satellites and large arrays
  • superconducting detectors
  • superconducting detectors
  • superconducting detectors
  • superconducting electronics
  • Superconducting resonators
  • wave detectors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Integrated Electrical Properties of the Frequency Multiplexed Cryogenic Readout System for Polarbear/Simons Array'. Together they form a unique fingerprint.

Cite this