The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that consists of three 0.5 m small-aperture telescopes (SATs) and one 6 m large-aperture telescope (LAT), sited at an elevation of 5200 m in the Atacama Desert in Chile. In order to meet the sensitivity requirements set for next-generation CMB telescopes, the LAT will deploy 30,000 transition edge sensor (TES) detectors at 100 mK across 7 optics tubes (OT), all within the Large Aperture Telescope Receiver (LATR). Additionally, the LATR has the capability to expand to 62,000 TES across 13 OTs. The LAT will be capable of making arcminute-resolution observations of the CMB, with detector bands centered at 30, 40, 90, 150, 230, and 280 GHz. We have rigorously tested the LATR systems prior to deployment in order to fully characterize the instrument and show that it can achieve the desired sensitivity levels. We show that the LATR meets cryogenic and mechanical requirements, and maintains acceptably low baseline readout noise.
@article{arxiv.2207.14212,
title = {The Simons Observatory: Development and Validation of the Large Aperture Telescope Receiver},
author = {Tanay Bhandarkar and Sanah Bhimani and Gabriele Coppi and Simon Dicker and Saianeesh K. Haridas and Kathleen Harrington and Jeffrey Iuliano and Bradley Johnson and Anna M. Kofman and Jack Lashner and Jenna Moore and David V. Nguyen and John Orlowski-Scherer and Karen Perez Sarmiento and Julia Robe and Maximiliano Silva-Feaver and Robert J. Thornton and Yuhan Wang and Zhilei Xu},
journal= {arXiv preprint arXiv:2207.14212},
year = {2022}
}