The Simons Observatory Large Aperture Telescope Receiver

Zhu, Ningfeng, Bhandarkar, Tanay, Coppi, Gabriele, Kofman, Anna M., Orlowski-Scherer, John L., Xu, Zhilei, Adachi, Shunsuke, Ade, Peter, Aiola, Simone, Austermann, Jason, Bazarko, Andrew O., Beall, James A., Bhimani, Sanah, Bond, J. Richard, Chesmore, Grace E., Choi, Steve K., Connors, Jake, Cothard, Nicholas F., Devlin, Mark, Dicker, Simon, Dober, Bradley, Duell, Cody J., Duff, Shannon M., Dünner, Rolando, Fabbian, Giulio, Galitzki, Nicholas, Gallardo, Patricio A., Golec, Joseph E., Haridas, Saianeesh K., Harrington, Kathleen, Healy, Erin, Ho, Shuay-Pwu Patty, Huber, Zachary B., Hubmayr, Johannes, Iuliano, Jeffrey, Johnson, Bradley R., Keating, Brian, Kiuchi, Kenji, Koopman, Brian J., Lashner, Jack, Lee, Adrian T., Li, Yaqiong, Limon, Michele, Link, Michael, Lucas, Tammy J, McCarrick, Heather, Moore, Jenna, Nati, Federico, Newburgh, Laura B., Niemack, Michael D., Pierpaoli, Elena, Randall, Michael J., Sarmiento, Karen Perez, Saunders, Lauren J., Seibert, Joseph, Sierra, Carlos, Sonka, Rita, Spisak, Jacob, Sutariya, Shreya, Tajima, Osamu, Teply, Grant P., Thornton, Robert J., Tsan, Tran, Tucker, Carole, Ullom, Joel, Vavagiakis, Eve M., Vissers, Michael R., Walker, Samantha, Westbrook, Benjamin, Wollack, Edward J. and Zannoni, Mario 2021. The Simons Observatory Large Aperture Telescope Receiver. Astrophysical Journal Supplement 256 (1) , 23. 10.3847/1538-4365/ac0db7

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Abstract

The Simons Observatory is a ground-based cosmic microwave background experiment that consists of three 0.4 m small-aperture telescopes and one 6 m Large Aperture Telescope, located at an elevation of 5300 m on Cerro Toco in Chile. The Simons Observatory Large Aperture Telescope Receiver (LATR) is the cryogenic camera that will be coupled to the Large Aperture Telescope. The resulting instrument will produce arcminute-resolution millimeter-wave maps of half the sky with unprecedented precision. The LATR is the largest cryogenic millimeter-wave camera built to date, with a diameter of 2.4 m and a length of 2.6 m. The coldest stage of the camera is cooled to 100 mK, the operating temperature of the bolometric detectors with bands centered around 27, 39, 93, 145, 225, and 280 GHz. Ultimately, the LATR will accommodate 13 40 cm diameter optics tubes, each with three detector wafers and a total of 62,000 detectors. The LATR design must simultaneously maintain the optical alignment of the system, control stray light, provide cryogenic isolation, limit thermal gradients, and minimize the time to cool the system from room temperature to 100 mK. The interplay between these competing factors poses unique challenges. We discuss the trade studies involved with the design, the final optimization, the construction, and ultimate performance of the system.

Item Type:	Article
Date Type:	Publication
Schools:	Physics and Astronomy
Additional Information:	Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Publisher:	American Astronomical Society
ISSN:	0067-0049
Date of First Compliant Deposit:	7 January 2022
Date of Acceptance:	21 June 2021
Last Modified:	11 Jan 2022 10:15
URI:	https://orca.cardiff.ac.uk/id/eprint/146444

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