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Proceedings Paper

Studies of systematic uncertainties for Simons Observatory: polarization modulator related effects
Author(s): Maria Salatino; Jacob Lashner; Martina Gerbino; Sara M. Simon; Joy Didier; Aamir Ali; Peter C. Ashton ; Sean Bryan; Yuji Chinone; Kevin Coughlin; Kevin T. Crowley; Giulio Fabbian; Nicholas Galitzki; Neil Goeckner-Wald ; Jon E. Gudmundsson ; Charles A. Hill; Brian Keating; Akito Kusaka; Adrian T. Lee; Jeffrey McMahon; Amber D. Miller; Giuseppe Puglisi; Christian L. Reichardt; Grant Teply; Zhilei Xu; Ningfeng Zhu
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Paper Abstract

The Simons Observatory (SO) will observe the temperature and polarization anisotropies of the cosmic microwave background (CMB) over a wide range of frequencies (27 to 270 GHz) and angular scales by using both small (∼0.5 m) and large (∼6 m) aperture telescopes. The SO small aperture telescopes will target degree angular scales where the primordial B-mode polarization signal is expected to peak. The incoming polarization signal of the small aperture telescopes will be modulated by a cryogenic, continuously-rotating half-wave plate (CRHWP) to mitigate systematic effects arising from slowly varying noise and detector pair-differencing. In this paper, we present an assessment of some systematic effects arising from using a CRHWP in the SO small aperture systems. We focus on systematic effects associated with structural properties of the HWP and effects arising when operating a HWP, including the amplitude of the HWP synchronous signal (HWPSS), and I → P (intensity to polarization) leakage that arises from detector non-linearity in the presence of a large HWPSS. We demonstrate our ability to simulate the impact of the aforementioned systematic effects in the time domain. This important step will inform mitigation strategies and design decisions to ensure that SO will meet its science goals.

Paper Details

Date Published: 23 July 2018
PDF: 22 pages
Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 1070848 (23 July 2018); doi: 10.1117/12.2312993
Show Author Affiliations
Maria Salatino, AstroParticule et Cosmologie Lab., Univ. Paris Diderot-Paris 7 (France)
Jacob Lashner, The Univ. of Southern California (United States)
Martina Gerbino, Stockholm Univ. (Sweden)
Sara M. Simon, Univ. of Michigan (United States)
Joy Didier, The Univ. of Southern California (United States)
Aamir Ali, Univ. of California, Berkeley (United States)
Peter C. Ashton , Univ. of California, Berkeley (United States)
Lawrence Berkeley National Lab. (United States)
Sean Bryan, Arizona State Univ. (United States)
Yuji Chinone, Univ. of California, Berkeley (United States)
Kevin Coughlin, Univ. of Michigan (United States)
Kevin T. Crowley, Princeton Univ. (United States)
Giulio Fabbian, Institut d'Astrophysique Spatiale, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay (France)
Nicholas Galitzki, Univ. of California, San Diego (United States)
Neil Goeckner-Wald , Univ. of California, Berkeley (United States)
Jon E. Gudmundsson , Stockholm Univ. (Sweden)
Charles A. Hill, Univ. of California, Berkeley (United States)
Lawrence Berkeley National Lab. (United States)
Brian Keating, Univ. of California, San Diego (United States)
Akito Kusaka, Lawrence Berkeley National Lab. (United States)
The Univ. of Tokyo (Japan)
Adrian T. Lee, Univ. of California, Berkeley (United States)
Lawrence Berkeley National Lab. (United States)
Jeffrey McMahon, Univ. of Michigan (United States)
Amber D. Miller, The Univ. of Southern California (United States)
Giuseppe Puglisi, Stanford Univ. (United States)
Christian L. Reichardt, The Univ. of Melbourne (Australia)
Grant Teply, Univ. of California, San Diego (United States)
Zhilei Xu, Univ. of Pennsylvania (United States)
Ningfeng Zhu, Univ. of Pennsylvania (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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