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Proceedings Paper

The Cosmology Large Angular Scale Surveyor receiver design
Author(s): Jeffrey Iuliano; Joseph Eimer ; Lucas Parker; Gary Rhoades; Aamir Ali; John W. Appel; Charles Bennett ; Michael Brewer ; Ricardo Bustos ; David Chuss ; Joseph Cleary ; Jullianna Couto; Sumit Dahal; Kevin Denis; Rolando Dünner ; Thomas Essinger-Hileman; Pedro Fluxa ; Mark Halpern ; Kathleen Harrington ; Kyle Helson; Gene Hilton ; Gary Hinshaw ; Johannes Hubmayr ; John Karakla ; Tobias Marriage ; Nathan Miller ; Jeffrey John McMahon; Carolina Nuñez; Ivan Padilla ; Gonzalo Palma ; Matthew Petroff ; Bastian Pradenas Márquez; Rodrigo Reeves ; Carl Reintsema ; Karwan Rostem ; Deniz Augusto Nunes Valle; Trevor Van Engelhoven; Bingjie Wang ; Qinan Wang ; Duncan Watts ; Janet Weiland ; Edward J. Wollack ; Zhilei Xu; Ziang Yan ; Lingzhen Zeng
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Paper Abstract

The Cosmology Large Angular Scale Surveyor consists of four instruments performing a CMB polarization survey. Currently, the 40 GHz and first 90 GHz instruments are deployed and observing, with the second 90 GHz and a multichroic 150/220 GHz instrument to follow. The receiver is a central component of each instrument's design and functionality. This paper describes the CLASS receiver design, using the first 90 GHz receiver as a primary reference. Cryogenic cooling and filters maintain a cold, low-noise environment for the detectors. We have achieved receiver detector temperatures below 50mK in the 40 GHz instrument for 85% of the initial 1.5 years of operation, and observed in-band efficiency that is consistent with pre-deployment estimates. At 90 GHz, less than 26% of in-band power is lost to the filters and lenses in the receiver, allowing for high optical efficiency. We discuss the mounting scheme for the filters and lenses, the alignment of the cold optics and detectors, stray light control, and magnetic shielding.

Paper Details

Date Published: 10 July 2018
PDF: 19 pages
Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 1070828 (10 July 2018); doi: 10.1117/12.2312954
Show Author Affiliations
Jeffrey Iuliano, Johns Hopkins Univ. (United States)
Joseph Eimer , Johns Hopkins Univ. (United States)
Lucas Parker, Johns Hopkins Univ. (United States)
Los Alamos National Lab. (United States)
Gary Rhoades, Johns Hopkins Univ. (United States)
Aamir Ali, John Hopkins Univ. (United States)
Univ. of California, Berkeley (United States)
John W. Appel, Johns Hopkins Univ. (United States)
Charles Bennett , Johns Hopkins Univ. (United States)
Michael Brewer , Johns Hopkins Univ. (United States)
Ricardo Bustos , Univ. Católica de la Santísima Concepción (Chile)
David Chuss , Villanova Univ. (United States)
Joseph Cleary , Johns Hopkins Univ. (United States)
Jullianna Couto, Johns Hopkins Univ. (United States)
Sumit Dahal, Johns Hopkins Univ. (United States)
Kevin Denis, NASA Goddard Space Flight Ctr. (United States)
Rolando Dünner , Pontificia Univ. Católica de Chile (Chile)
Thomas Essinger-Hileman, NASA Goddard Space Flight Ctr. (United States)
Pedro Fluxa , Pontificia Univ. Católica de Chile (Chile)
Mark Halpern , The Univ. of British Columbia (Canada)
Kathleen Harrington , Johns Hopkins Univ. (United States)
Kyle Helson, NASA Goddard Space Flight Ctr. (United States)
Gene Hilton , National Institute of Standards and Technology (United States)
Gary Hinshaw , The Univ. of British Columbia (Canada)
Johannes Hubmayr , National Institute of Standards and Technology (United States)
John Karakla , Johns Hopkins Univ. (United States)
Tobias Marriage , Johns Hopkins Univ. (United States)
Nathan Miller , Johns Hopkins Univ. (United States)
Jeffrey John McMahon, Univ. of Michigan (United States)
Carolina Nuñez, Johns Hopkins Univ. (United States)
Ivan Padilla , Johns Hopkins Univ. (United States)
Gonzalo Palma , Univ. de Chile (Chile)
Matthew Petroff , Johns Hopkins Univ. (United States)
Bastian Pradenas Márquez, Univ. de Chile (Chile)
Rodrigo Reeves , Univ. de Concepción (Chile)
Carl Reintsema , National Institute of Standards and Technology (United States)
Karwan Rostem , NASA Goddard Space Flight Ctr. (United States)
Deniz Augusto Nunes Valle, Johns Hopkins Univ. (United States)
Trevor Van Engelhoven, Johns Hopkins Univ. (United States)
Bingjie Wang , Johns Hopkins Univ. (United States)
Qinan Wang , Johns Hopkins Univ. (United States)
Duncan Watts , Johns Hopkins Univ. (United States)
Janet Weiland , Johns Hopkins Univ. (United States)
Edward J. Wollack , NASA Goddard Space Flight Ctr. (United States)
Zhilei Xu, Johns Hopkins Univ. (United States)
Univ. of Pennsylvania (United States)
Ziang Yan , The Univ. of British Columbia (Canada)
Lingzhen Zeng , Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 10708:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX
Jonas Zmuidzinas; Jian-Rong Gao, Editor(s)

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