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 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) |
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Title of host publication | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI |
DOIs | |
State | Published - 2012 |
Externally published | Yes |
Event | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI - Amsterdam, Netherlands Duration: Jul 3 2012 → Jul 6 2012 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 8452 |
ISSN (Print) | 0277-786X |
Other
Other | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI |
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Country/Territory | Netherlands |
City | Amsterdam |
Period | 7/3/12 → 7/6/12 |
Keywords
- Cosmic microwave background
- Ination
- Polarization
- The keck array
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering