The Simons Observatory (SO) is a suite of instruments sensitive to temperature and polarization of the cosmic microwave background (CMB) to be located at Cerro Toco in the Atacama Desert in Chile. Five telescopes, one large aperture telescope and four small aperture telescopes, will host roughly 70,000 highly multiplexed transition edge sensor (TES) detectors operated at 100 mK. Each SO focal plane module (UFM) couples 1,764 TESes to microwave resonators in a microwave multiplexing (uMux) readout circuit. Before detector integration, the 100 mK uMux components are packaged into multiplexing modules (UMMs), which are independently validated to ensure they meet SO performance specifications. Here we present the assembly developments of these UMM readout packages for mid frequency (90/150 GHz) and ultra high frequency (220/280 GHz) UFMs.
@article{arxiv.2204.05869,
title = {Assembly development for the Simons Observatory focal plane readout module},
author = {Erin Healy and Aamir M. Ali and Kam Arnold and Jason E. Austermann and James A. Beall and Sarah Marie Bruno and Steve K. Choi and Jake Connors and Nicholas F. Cothar and Bradley Dober and Shannon M. Duff and Nicholas Galitzki and Gene Hilton and Shuay-Pwu Patty Ho and Johannes Hubmayr and Bradley R. Johnson and Yaqiong Li and Michael J. Link and Tammy J. Lucas and Heather McCarrick and Michael D. Niemack and Maximiliano Silva-Feaver and Rita F. Sonka and Suzanne Staggs and Eve M. Vavagiakis and Michael R. Vissers and Yuhan Wang and Benjamin Westbrook and Edward J. Wollack and Zhilei Xu and Kaiwen Zheng},
journal= {arXiv preprint arXiv:2204.05869},
year = {2022}
}