@inproceedings{39d12a65afe24e588105cfbd1b10cebe,
title = "Systematics of an ambient-temperature, rapidly-rotating half-wave plate",
abstract = "In these proceedings, we summarize our in-field evaluation of temperature-to-polarization leakage associated with the use of a continuously-rotating, ambient-temperature half-wave plate (HWP) on the Atacama B-Mode Search (ABS) experiment. Using two seasons of data, we demonstrate scalar leakage of ~ 0.01%. This is consistent with model expectations and an order of magnitude better than any previously-reported leakage. We constrain higher-order dipole and quadrupole leakage terms to be < 0.06% (95% confidence). Without any mitigation from scan cross-linking or boresight rotation, this corresponds to an upper limit on systematic errors in the tensor-to-scalar ratio r ≤ 0.01. The HWP significantly reduces temperature-to-polarization leakage systematic errors for ABS and shows the promise of fast polarization modulation with HWPs for future experiments. Full details can be found in Ref. 1.",
keywords = "B-mode polarization, Cosmic microwave background (CMB), Half-wave plates, Polarization modulators",
author = "T. Essinger-Hileman and A. Kusaka and Appel, {J. W.} and P. Gallardo and Irwin, {K. D.} and N. Jarosik and Nolta, {M. R.} and Page, {L. A.} and Parker, {L. P.} and S. Raghunathan and Sievers, {J. L.} and Simon, {S. M.} and Staggs, {S. T.} and K. Visnjic",
note = "Funding Information: Work at Princeton University is supported by the U.S. National Science Foundation through awards PHY- 0355328 and PHY-085587, the U.S. National Aeronautics and Space Administration (NASA) through award NNX08AE03G, the Wilkinson Fund, and the Mishrahi Gift. Work at NIST is supported by the NIST Innovations in Measurement Science program. Work at LBNL is supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under contract No. DE-AC02-05CH11231. ABS operates in the Parque Astron{\'o}mico Atacama in northern Chile under the auspices of the Comisi{\'o}n Nacional de Investigaci{\'o}n Cient{\'i}fica y Tecnol{\'o}gica de Chile (CONICYT). PWV measurements were provided by the Atacama Pathfinder Experiment (APEX). Some of the analyses were performed on the GPC supercomputer at the SciNet HPC Consortium. SciNet is funded by the Canada Foundation of Innovation under the auspices of Compute Canada, the Government of Ontario, the Ontario Research Fund - Research Excellence; and the University of Toronto. We would like to acknowledge the following people for their assistance in the instrument design, construction, operation, and data analysis: G. Atkinson, J. Beall, F. Beroz, S. M. Cho, B. Dix, T. Evans, J. Fowler, M. Halpern, B. Harrop, M. Hasselfield, S. P. Ho, J. Hubmayr, T. Marriage, J. McMahon, M. Niemack, S. Pufu, M. Uehara, and K. W. Yoon. T. E.-H. was supported by a National Defense Science and Engineering Graduate Fellowship, as well as a National Science Foundation Astronomy and Astrophysics Postdoctoral Fellowship. A. K. acknowledges the Dicke Fellowship. SR was in receipt of CONICYT PhD studentship and received partial support from a CONICYT Anillo project (ACT 1122). S. M. S. is supported by a NASA Office of the Chief Technologist's Space Technology Research Fellowship. L. P. P. acknowledges the NASA Earth and Space Sciences Fellowship. Publisher Copyright: {\textcopyright} 2016 SPIE.; Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII ; Conference date: 28-06-2016 Through 01-07-2016",
year = "2016",
doi = "10.1117/12.2232711",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Jonas Zmuidzinas and Holland, {Wayne S.}",
booktitle = "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII",
address = "United States",
}