Optical characterization of the Keck array polarimeter at the South Pole
Author
Vieregg, A. G.
Ade, P. A. R.
Aikin, R.
Bischoff, C.
Bock, J. J.
Bonetti, J. A.
Bradford, K. J.
Brevik, J. A.
Dowell, C. D.
Duband, L.
Filippini, J. P.
Fliescher, S.
Golwala, S. R.
Gordon, M. S.
Halpern, M.
Hilton, G.
Hristov, V. V.
Irwin, K.
Kernasovskiy, S.
Kuo, C. L.
Leitch, E.
Lueker, M.
Montroy, T.
Netterfield, C. B.
Nguyen, H. T.
O, R.
Ogburn, R. W.
Pryke, C.
Ruhl, J. E.
Runyan, M.
Schwarz, R.
Sheehy, C.
Staniszewski, Z.
Sudiwala, R.
Teply, G.
Tolan, J.
Turner, A. D.
Wilson, P.
Wong, C. L.
Note: Order does not necessarily reflect citation order of authors.
Published Version
https://doi.org/10.1117/12.926639Metadata
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Vieregg, A. G., P. A. R. Ade, R. Aikin, C. Bischoff, J. J. Bock, J. A. Bonetti, K. J. Bradford et al. 2012. Optical Characterization of the Keck Array Polarimeter at the South Pole. Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI edited by Wayne S. Holland, Jonas Zmuidzinas, Proceedings of SPIE 8452: 845226. dx.doi.org/10.1117/12.926639Abstract
The Keck Array (Spud) is a set of microwave polarimeters that observes from the South Pole at degree angular scales in search of a signature of Inflation imprinted as B-mode polarization in the Cosmic Microwave Background (CMB). The first three Keck Array receivers were deployed during the 2010-2011 Austral summer, followed by two new receivers in the 2011-2012 summer season, completing the full five-receiver array. All five receivers are currently observing at 150 GHz. The Keck Array employs the field-proven Bicep/Bicep2 strategy of using small, cold, on-axis refractive optics, providing excellent control of systematics while maintaining a large field of view. This design allows for full characterization of far-field optical performance using microwave sources on the ground. We describe our efforts to characterize the main beam shape and beam shape mismatch between co-located orthogonally-polarized detector pairs, and discuss the implications of measured differential beam parameters on temperature to polarization leakage in CMB analysis.Other Sources
http://arxiv.org/pdf/1208.0844v1.pdfTerms of Use
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