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) |
|---|---|
| Title of host publication | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI |
| DOIs | |
| State | Published - 2012 |
| 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 |
|---|---|
| Volume | 8452 |
| ISSN (Print) | 0277-786X |
Other
| Other | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI |
|---|---|
| Country/Territory | Netherlands |
| City | Amsterdam |
| Period | 7/3/12 → 7/6/12 |
Keywords
- Cosmic microwave background
- Ination
- Polarization
- The keck array
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