CMB-S4 is the fourth-generation ground-based cosmic microwave background project, designed to probe the early universe and cosmic inflation. CMB-S4 would achieve its science goals in part by dramatically increasing the number of transition edge sensor (TES) bolometer detectors on the sky. The detector readout system for CMB-S4 is time-division multiplexing (TDM) with a two-stage Superconducting Quantum Interference Device (SQUID) system. To accommodate the large increase in detectors, the size of our camera increases, placing physical constraints on the readout, its wiring, and its power dissipation. Therefore, to optimize readout performance, we need to balance competing design considerations such as thermal load and bandwidth. We present results characterizing the thermal and electrical performance of prototype components, including wiring and SQUID arrays for CMB-S4, and discuss the impact on overall system performance.
@article{arxiv.2511.02173,
title = {Thermal and Electrical Properties of Prototype Readout Components for CMB-S4},
author = {Wilber Dominguez and Darcy R. Barron and Zeeshan Ahmed and Amy N. Bender and Sandra Diez and Malcolm Durkin and Tristan A. Eggenberger and Gunther Haller and Shawn W. Henderson and Katherine Hewey and Johannes Hubmayr and Christopher Rooney and Robinjeet Singh and Michael Vissers},
journal= {arXiv preprint arXiv:2511.02173},
year = {2025}
}
Comments
7 pages, 4 figures, submitted for review to IEEE Transactions on Applied Superconductivity (IEEE-TAS) for a special issue for Low Temperature Detectors 2025 (LTD2025) conference proceedings