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Proceedings Paper

Optical characterization of the Keck array polarimeter at the South Pole
Author(s): A. G. Vieregg; P. A. R. Ade; R. Aikin; C. Bischoff; J. J. Bock; J. A. Bonetti; K. J. Bradford; J. A. Brevik; C. D. Dowell; L. Duband; J. P. Filippini; S. Fliescher; S. R. Golwala; M. S. Gordon; M. Halpern; G. Hilton; V. V. Hristov; K. Irwin; S. Kernasovskiy; J. M. Kovac; C. L. Kuo; E. Leitch; M. Lueker; T. Montroy; C. B. Netterfield; H. T. Nguyen; R. O'Brient; R. W. Ogburn; C. Pryke; J. E. Ruhl; M. Runyan; R. Schwarz; C. Sheehy; Z. Staniszewski; R. Sudiwala; G. Teply; J. Tolan; A. D. Turner; P. Wilson; C. L. Wong
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Paper Abstract

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.

Paper Details

Date Published: 24 September 2012
PDF: 13 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 845226 (24 September 2012); doi: 10.1117/12.926639
Show Author Affiliations
A. G. Vieregg, Harvard-Smithsonian Ctr. for Astrophysics (United States)
P. A. R. Ade, Univ. of Wales, Cardiff (United Kingdom)
R. Aikin, California Institute of Technology (United States)
C. Bischoff, Harvard-Smithsonian Ctr. for Astrophysics (United States)
J. J. Bock, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
J. A. Bonetti, Jet Propulsion Lab. (United States)
K. J. Bradford, Harvard-Smithsonian Ctr. for Astrophysics (United States)
J. A. Brevik, California Institute of Technology (United States)
C. D. Dowell, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
L. Duband, Institut Nanosciences et Cryogénie, CNRS, Univ. Joseph Fourier (France)
J. P. Filippini, California Institute of Technology (United States)
S. Fliescher, Univ. of Minnesota (United States)
S. R. Golwala, California Institute of Technology (United States)
M. S. Gordon, Harvard-Smithsonian Ctr. for Astrophysics (United States)
M. Halpern, Univ. of British Columbia (Canada)
G. Hilton, National Institute of Standards and Technology (United States)
V. V. Hristov, California Institute of Technology (United States)
K. Irwin, National Institute of Standards and Technology (United States)
S. Kernasovskiy, Stanford Univ. (United States)
J. M. Kovac, Harvard-Smithsonian Ctr. for Astrophysics (United States)
C. L. Kuo, Stanford Univ. (United States)
E. Leitch, Univ. of Chicago (United States)
M. Lueker, California Institute of Technology (United States)
T. Montroy, Case Western Reserve Univ. (United States)
C. B. Netterfield, Univ. of Toronto (Canada)
H. T. Nguyen, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
R. O'Brient, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
R. W. Ogburn, Stanford Univ. (United States)
C. Pryke, Univ. of Minnesota (United States)
J. E. Ruhl, Case Western Reserve Univ. (United States)
M. Runyan, California Institute of Technology (United States)
R. Schwarz, Univ. of Minnesota (United States)
C. Sheehy, Univ. of Minnesota (United States)
Univ. of Chicago (United States)
Z. Staniszewski, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
R. Sudiwala, Univ. of Wales, Cardiff (United Kingdom)
G. Teply, California Institute of Technology (United States)
J. Tolan, Stanford Univ. (United States)
A. D. Turner, Jet Propulsion Lab. (United States)
P. Wilson, Jet Propulsion Lab. (United States)
C. L. Wong, Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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