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 circuity 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.
@article{arxiv.2311.04424,
title = {End-to-End Modeling of the TDM Readout System for CMB-S4},
author = {David C. Goldfinger and Zeeshan Ahmed and Darcy R. Barron and W. Bertrand Doriese and Malcolm Durkin and Jeffrey P. Filippini and Gunther Haller and Shawn W. Henderson and Ryan Herbst and Johannes Hubmayr and Kent Irwin and Ben Reese and Leonid Sapozhnikov and Keith L. Thompson and Joel Ullom and Michael R. Vissers},
journal= {arXiv preprint arXiv:2311.04424},
year = {2023}
}
Comments
This manuscript was submitted to the Journal of Low Temperature Physics as part of the special issue "LTD20", supporting the conference contribution RP-005