@inproceedings{6e2d291e6a5b4b5bbd2190a7133770d0,
title = "Studies of systematic uncertainties for Simons Observatory: Polarization modulator related effects",
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 ({\^a}1/40.5 m) and large ({\^a}1/46 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.",
keywords = "Continuously Rotating Half-Wave Plate, Cosmic Microwave Background, Intensity to Polarization Leakage, Non Linearity, Sapphire, Simons Observatory, Slant Incidence, Systematic effects",
author = "Maria Salatino and Jacob Lashner and Martina Gerbino and Simon, \{Sara M.\} and Joy Didier and Aamir Ali and Ashton, \{Peter C.\} and Sean Bryan and Yuji Chinone and Kevin Coughlin and Crowley, \{Kevin T.\} and Giulio Fabbian and Nicholas Galitzki and Neil Goeckner-Wald and Gudmundsson, \{Jon E.\} and Hill, \{Charles A.\} and Brian Keating and Akito Kusaka and Lee, \{Adrian T.\} and Jeffrey McMahon and Miller, \{Amber D.\} and Giuseppe Puglisi and Reichardt, \{Christian L.\} and Grant Teply and Zhilei Xu and Ningfeng Zhu",
note = "Funding Information: This work was supported in part by a grant from the Simons Foundation (Award \#457687, B.K.). We would like to thank Tom Essinger-Hileman for many helpful discussions and for making his TMM code publicly available. The authors also acknowledge Julien Peloton for the development of the s4cmb pipeline and his instruction on how to use it. MS acknowledges the financial support of the UnivEarthS Labex program at Sorbonne Paris Cit{\'e} (ANR-10-LABX-0023 and ANR-11-IDEX-0005-02). MG and JEG acknowledge support by the Vetenskapsr{\aa}det (Swedish Research Council) through contract No. 638-2013-8993 and the Oskar Klein Centre for Cosmoparticle Physics. Publisher Copyright: {\textcopyright} 2018 SPIE.; Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018 ; Conference date: 12-06-2018 Through 15-06-2018",
year = "2018",
doi = "10.1117/12.2312993",
language = "English",
isbn = "9781510619692",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Jonas Zmuidzinas and Jian-Rong Gao",
booktitle = "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX",
address = "United States",
}