Abstract
BICEP Array is a degree-scale Cosmic Microwave Background (CMB) experiment that will search for primordial B-mode polarization while constraining Galactic foregrounds. BICEP Array will be comprised of four receivers to cover a broad frequency range with channels at 30/40, 95, 150 and 220/270 GHz. The first low-frequency receiver will map synchrotron emission at 30 and 40 GHz and will deploy to the South Pole at the end of 2019. In this paper, we give an overview of the BICEP Array science and instrument, with a focus on the detector module. We designed corrugations in the metal frame of the module to suppress unwanted interactions with the antenna-coupled detectors that would otherwise deform the beams of edge pixels. This design reduces the residual beam systematics and temperature-to-polarization leakage due to beam steering and shape mismatch between polarized beam pairs. We report on the simulated performance of single-and wide-band corrugations designed to minimize these effects. Our optimized design alleviates beam differential ellipticity caused by the metal frame to about 7% over 57% bandwidth (25 to 45 GHz), which is close to the level due the bare antenna itself without a metal frame. Initial laboratory measurements are also presented.
Original language | English (US) |
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Title of host publication | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX |
Editors | Jonas Zmuidzinas, Jian-Rong Gao |
Publisher | SPIE |
ISBN (Print) | 9781510619692 |
DOIs | |
State | Published - 2018 |
Event | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018 - Austin, United States Duration: Jun 12 2018 → Jun 15 2018 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 10708 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Other
Other | Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX 2018 |
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Country/Territory | United States |
City | Austin |
Period | 6/12/18 → 6/15/18 |
Bibliographical note
Publisher Copyright:© 2018 SPIE.
Keywords
- BICEP Array
- Beam Systematic
- Corrugations
- Cosmic Microwave Background
- Detector