TY - GEN
T1 - The Simons Observatory
T2 - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020
AU - Xu, Zhilei
AU - Bhandarkar, Tanay
AU - Coppi, Gabriele
AU - Kofman, Anna M.
AU - Orlowski-Scherer, John L.
AU - Zhu, Ningfeng
AU - Ali, Aamir M.
AU - Arnold, Kam
AU - Austermann, Jason E.
AU - Choi, Steve K.
AU - Connors, Jake
AU - Cothard, Nicholas F.
AU - Devlin, Mark
AU - Dicker, Simon
AU - Dober, Bradley
AU - Duff, Shannon M.
AU - Fabbian, Giulio
AU - Galitzki, Nicholas
AU - Haridas, Saianeesh K.
AU - Harrington, Kathleen
AU - Healy, Erin
AU - Ho, Shuay Pwu Patty
AU - Hubmayr, Johannes
AU - Iuliano, Jeffrey
AU - Lashner, Jack
AU - Li, Yaqiong
AU - Limon, Michele
AU - Koopman, Brian J.
AU - McCarrick, Heather
AU - Moore, Jenna
AU - Nati, Federico
AU - Niemack, Michael D.
AU - Reichardt, Christian L.
AU - Sarmiento, Karen Perez
AU - Seibert, Joseph
AU - Silva-Feaver, Maximiliano
AU - Sonka, Rita F.
AU - Staggs, Suzanne
AU - Thornton, Robert J.
AU - Vavagiakis, Eve M.
AU - Vissers, Michael R.
AU - Walker, Samantha
AU - Wang, Yuhan
AU - Wollack, Edward J.
AU - Zheng, Kaiwen
N1 - Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
PY - 2020
Y1 - 2020
N2 - The Simons Observatory (SO) will observe the cosmic microwave background (CMB) from Cerro Toco in the Atacama Desert of Chile. The observatory consists of three 0.5m Small Aperture Telescopes (SATs) and one 6m Large Aperture Telescope (LAT), covering six frequency bands centering around 30, 40, 90, 150, 230, and 280 GHz. The SO observations will transform our understanding of our universe by characterizing the properties of the early universe, measuring the number of relativistic species and the mass of neutrinos, improving our understanding of galaxy evolution, and constraining the properties of cosmic reionization.1 As a critical instrument, the Large Aperture Telescope Receiver (LATR) is designed to cool ∼60,000 transition-edge sensors (TES)2 to <100mK on a 1.7m diameter focal plane. The unprecedented scale of the LATR drives a complex design.3-5 In this paper, We will first provide an overview of the LATR design. Integration and validation of the LATR design is discussed in detail, including mechanical strength, optical alignment, and cryogenic performance of the five cryogenic stages (80 K, 40 K, 4 K, 1 K, and 100 mK). We will also discuss the microwave-multiplexing (μMux) readout system implemented in the LATR and demonstrate operation of dark, prototype TES bolometers. The μMux readout technology enables one coaxial loop to read out Ο(103) TES detectors. Its implementation within the LATR serves as a critical validation for the complex RF chain design. The successful validation of the LATR performance is not only a critical milestone within the Simons Observatory, it also provides a valuable reference for other experiments, e.g. CCAT-prime6 and CMB-S4.7,
AB - The Simons Observatory (SO) will observe the cosmic microwave background (CMB) from Cerro Toco in the Atacama Desert of Chile. The observatory consists of three 0.5m Small Aperture Telescopes (SATs) and one 6m Large Aperture Telescope (LAT), covering six frequency bands centering around 30, 40, 90, 150, 230, and 280 GHz. The SO observations will transform our understanding of our universe by characterizing the properties of the early universe, measuring the number of relativistic species and the mass of neutrinos, improving our understanding of galaxy evolution, and constraining the properties of cosmic reionization.1 As a critical instrument, the Large Aperture Telescope Receiver (LATR) is designed to cool ∼60,000 transition-edge sensors (TES)2 to <100mK on a 1.7m diameter focal plane. The unprecedented scale of the LATR drives a complex design.3-5 In this paper, We will first provide an overview of the LATR design. Integration and validation of the LATR design is discussed in detail, including mechanical strength, optical alignment, and cryogenic performance of the five cryogenic stages (80 K, 40 K, 4 K, 1 K, and 100 mK). We will also discuss the microwave-multiplexing (μMux) readout system implemented in the LATR and demonstrate operation of dark, prototype TES bolometers. The μMux readout technology enables one coaxial loop to read out Ο(103) TES detectors. Its implementation within the LATR serves as a critical validation for the complex RF chain design. The successful validation of the LATR performance is not only a critical milestone within the Simons Observatory, it also provides a valuable reference for other experiments, e.g. CCAT-prime6 and CMB-S4.7,
KW - Astronomical Instrumentation
KW - Cosmic Microwave Background
KW - Cryogenic Technology
KW - Observa-tional Cosmology
UR - http://www.scopus.com/inward/record.url?scp=85100067060&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85100067060&partnerID=8YFLogxK
U2 - 10.1117/12.2576151
DO - 10.1117/12.2576151
M3 - Conference contribution
AN - SCOPUS:85100067060
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X
A2 - Zmuidzinas, Jonas
A2 - Gao, Jian-Rong
PB - SPIE
Y2 - 14 December 2020 through 22 December 2020
ER -