NPA Seminar: Maximiliano Silva-Feaver, University of California, San Diego and The Center for Computational Astrophysics at the Flatiron Institute, “Microwave SQUID Multiplexer Development for the Simons Observatory”

Thursday Sep 8, 2022, 1:00 PM → 2:00 PM US/Eastern

WL 216

The Simons Observatory is a next generation cosmic microwave background (CMB) observatory sited at Cerro Toco in the Atacama Desert in Chile, scheduled to begin site commissioning in early 2023. It consists of three low angular resolution telescopes dedicated to measuring the degree scale B-mode signal generated from gravitational waves during inflation and one high angular resolution telescope focused on measuring secondary arcminute scale effects. The arcminute resolution telescope will allow us to better constraing primordial non-gaussianity, the neutrino mass hierarchy, the number of effective relativistic species, and the growth of large scale structure. We are fielding 70,000 background limited 100 mK transition edge sensor polarimetric bolometers which enables a new frontier in sensitivity and is a key technological enabler for the observatories science goals. In order to scale to this large detector count a new superconducting cryogenic readout scheme, the microwave squid multiplexer, was developed. I will present on the development of the multiplexer, and the requisite room temperature electronics developed to read it out, its packaging, and integration into a scalable and deployable system for the observatory. I will conclude with an outlook for the future of the observatory and applications for the microwave squid multiplexer technology.
 

npa-poster-silva-feaver.pdf