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 Ination 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.
|Original language||English (US)|
|Title of host publication||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI|
|State||Published - 2012|
|Event||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI - Amsterdam, Netherlands|
Duration: Jul 3 2012 → Jul 6 2012
|Name||Proceedings of SPIE - The International Society for Optical Engineering|
|Other||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI|
|Period||7/3/12 → 7/6/12|
Copyright 2013 Elsevier B.V., All rights reserved.
- Cosmic microwave background
- The keck array