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Proceedings Paper

The Cosmology Large Angular Scale Surveyor
Author(s): Kathleen Harrington; Tobias Marriage; Aamir Ali; John W. Appel; Charles L. Bennett; Fletcher Boone; Michael Brewer; Manwei Chan; David T. Chuss; Felipe Colazo; Sumit Dahal; Kevin Denis; Rolando Dünner; Joseph Eimer; Thomas Essinger-Hileman; Pedro Fluxa; Mark Halpern; Gene Hilton; Gary F. Hinshaw; Johannes Hubmayr; Jeffrey Iuliano; John Karakla; Jeff McMahon; Nathan T. Miller; Samuel H. Moseley; Gonzalo Palma; Lucas Parker; Matthew Petroff; Bastián Pradenas; Karwan Rostem; Marco Sagliocca; Deniz Valle; Duncan Watts; Edward Wollack; Zhilei Xu; Lingzhen Zeng
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Paper Abstract

The Cosmology Large Angular Scale Surveyor (CLASS) is a four telescope array designed to characterize relic primordial gravitational waves from in ation and the optical depth to reionization through a measurement of the polarized cosmic microwave background (CMB) on the largest angular scales. The frequencies of the four CLASS telescopes, one at 38 GHz, two at 93 GHz, and one dichroic system at 145/217 GHz, are chosen to avoid spectral regions of high atmospheric emission and span the minimum of the polarized Galactic foregrounds: synchrotron emission at lower frequencies and dust emission at higher frequencies. Low-noise transition edge sensor detectors and a rapid front-end polarization modulator provide a unique combination of high sensitivity, stability, and control of systematics. The CLASS site, at 5200 m in the Chilean Atacama desert, allows for daily mapping of up to 70% of the sky and enables the characterization of CMB polarization at the largest angular scales. Using this combination of a broad frequency range, large sky coverage, control over systematics, and high sensitivity, CLASS will observe the reionization and recombination peaks of the CMB E- and B-mode power spectra. CLASS will make a cosmic variance limited measurement of the optical depth to reionization and will measure or place upper limits on the tensor-to-scalar ratio, r, down to a level of 0.01 (95% C.L.).

Paper Details

Date Published: 19 July 2016
PDF: 21 pages
Proc. SPIE 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, 99141K (19 July 2016); doi: 10.1117/12.2233125
Show Author Affiliations
Kathleen Harrington, Johns Hopkins Univ. (United States)
Tobias Marriage, Johns Hopkins Univ. (United States)
Aamir Ali, Johns Hopkins Univ. (United States)
John W. Appel, Johns Hopkins Univ. (United States)
Charles L. Bennett, Johns Hopkins Univ. (United States)
Fletcher Boone, Univ. of Michigan (United States)
Michael Brewer, Johns Hopkins Univ. (United States)
Manwei Chan, Johns Hopkins Univ. (United States)
David T. Chuss, Villanova Univ. (United States)
Felipe Colazo, NASA Goddard Space Flight Ctr. (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)
Joseph Eimer, Johns Hopkins Univ. (United States)
Thomas Essinger-Hileman, Johns Hopkins Univ. (United States)
Pedro Fluxa, Pontificia Univ. Católica de Chile (Chile)
Mark Halpern, The Univ. of British Columbia (Canada)
Gene Hilton, National Institute of Standards and Technology (United States)
Gary F. Hinshaw, The Univ. of British Columbia (Canada)
Johannes Hubmayr, National Institute of Standards and Technology (United States)
Jeffrey Iuliano, Johns Hopkins Univ. (United States)
John Karakla, Johns Hopkins Univ. (United States)
Jeff McMahon, Univ. of Michigan (United States)
Nathan T. Miller, Johns Hopkins Univ. (United States)
NASA Goddard Space Flight Ctr. (United States)
Samuel H. Moseley, NASA Goddard Space Flight Ctr. (United States)
Gonzalo Palma, Univ. de Chile (Chile)
Lucas Parker, Johns Hopkins Univ. (United States)
Matthew Petroff, Johns Hopkins Univ. (United States)
Bastián Pradenas, Univ. de Chile (Chile)
Karwan Rostem, Johns Hopkins Univ. (United States)
NASA Goddard Space Flight Ctr. (United States)
Marco Sagliocca, Villanova Univ. (United States)
Deniz Valle, Johns Hopkins Univ. (United States)
Duncan Watts, Johns Hopkins Univ. (United States)
Edward Wollack, NASA Goddard Space Flight Ctr. (United States)
Zhilei Xu, Johns Hopkins Univ. (United States)
Lingzhen Zeng, Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 9914:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)

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