End-to-End Modeling of the TDM Readout System for CMB-S4

D. C. Goldfinger, Z. Ahmed, D. R. Barron, W. B. Doriese, M. Durkin, J. P. Filippini, G. Haller, S. W. Henderson, R. Herbst, J. Hubmayr, K. Irwin, B. Reese, L. Sapozhnikov, K. L. Thompson, J. Ullom, M. R. Vissers

Research output: Contribution to journalArticlepeer-review

Abstract

The CMB-S4 experiment is developing next-generation ground-based microwave telescopes to observe the cosmic microwave background with unprecedented sensitivity. This will require an order of magnitude increase in the 100-mK detector count, which, in turn, increases the demands on the readout system. The CMB-S4 readout will use time-division multiplexing (TDM), taking advantage of faster switches and amplifiers in order to achieve an increased multiplexing factor. To facilitate the design of the new readout system, we have developed a model that predicts the bandwidth and noise performance of this circuitry and its interconnections. This is then used to set requirements on individual components in order to meet the performance necessary for the full system. We present an overview of this model and compare the model results to the performance of both legacy and prototype readout hardware.

Original languageEnglish (US)
Pages (from-to)143-151
Number of pages9
JournalJournal of Low Temperature Physics
Volume215
Issue number3-4
DOIs
StatePublished - May 2024

Keywords

  • Cryogenics
  • Readout
  • SQUID
  • Time-division multiplexing

ASJC Scopus subject areas

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

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