Simons Observatory large aperture telescope receiver design overview

Ningfeng Zhu, John L. Orlowski-Scherer, Zhilei Xu, Aamir Ali, Kam S. Arnold, Peter C. Ashton, Gabriele Coppi, Mark J. Devlin, Simon Dicker, Nicholas Galitzki, Patricio A. Gallardo, Shawn W. Henderson, Shuay Pwu Patty Ho, Johannes Hubmayr, Brian Keating, Adrian T. Lee, Michele Limon, Marius Lungu, Philip D. Mauskopf, Andrew J. MayJeff McMahon, Michael D. Niemack, Lucio Piccirillo, Giuseppe Puglisi, Mayuri Sathyanarayana Rao, Maria Salatino, Max Silva-Feaver, Sara M. Simon, Suzanne Staggs, Robert Thornton, Joel N. Ullom, Eve M. Vavagiakis, Benjamin Westbrook, Edward J. Wollack

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations


The Simons Observatory (SO) will make precision temperature and polarization measurements of the cosmic microwave background (CMB) using a series of telescopes which will cover angular scales between one arcminute and tens of degrees and sample frequencies between 27 and 270 GHz. Here we present the current design of the large aperture telescope receiver (LATR), a 2.4m diameter cryostat that will be mounted on the SO 6m telescope and will be the largest CMB receiver to date. The cryostat size was chosen to take advantage of the large focal plane area having high Strehl ratios, which is inherent to the Cross-Dragone telescope design. The LATR will be able to accommodate thirteen optics tubes, each having a 36 cm diameter aperture and illuminating several thousand transition-edge sensor (TES) bolometers. This set of equipment will provide an opportunity to make measurements with unparalleled sensitivity. However, the size and complexity of the LATR also pose numerous technical challenges. In the following paper, we present the design of the LATR and include how we address these challenges. The solutions we develop in the process of designing the LATR will be informative for the general CMB community, and for future CMB experiments like CMB-S4.

Original languageEnglish (US)
Title of host publicationMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX
EditorsJonas Zmuidzinas, Jian-Rong Gao
ISBN (Print)9781510619692
StatePublished - 2018
Externally publishedYes
EventMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018 - Austin, United States
Duration: Jun 12 2018Jun 15 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


  • CMB
  • LATR
  • SO
  • Simons Observatory
  • cryogenic
  • ground-based telescope
  • large aperture telescope receiver


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