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Design and performance of wide-band corrugated walls for the BICEP Array detector modules at 30/40 GHz

Soliman, A. and Aikin, R. W. and Bock, J. J. and Brevik, J. A. and Hildebrandt, S. R. and Hilton, G. C. and Hui, H. and Kefeli, S. and Lueker, M. and Moncelsi, L. and O'Brient, R. and Schillaci, A. and Staniszewski, Z. K. and Steinbach, B. and Teply, G. P. and van Zyl, J. and Wandui, A. and Zhang, C. (2018) Design and performance of wide-band corrugated walls for the BICEP Array detector modules at 30/40 GHz. In: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX. Proceedings of SPIE. No.10708. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 107082G. ISBN 9781510619692.

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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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Bock, J. J.0000-0002-5710-5212
Moncelsi, L.0000-0002-4242-3015
Zhang, C.0000-0001-8288-5823
Additional Information:© 2018 Society of Photo-optical Instrumentation Engineers (SPIE). The Bicep/Keck Array project have been made possible through a series of grants from the National Science Foundation including 0742818, 0742592, 1044978, 1110087, 1145172, 1145143, 1145248, 1639040, 1638957, 1638978, 1638970, & 1726917 and by the Keck Foundation. The development of antenna-coupled detector technology was supported by the JPL Research and Technology Development Fund and NASA Grants 06-ARPA206-0040, 10-SAT10-0017, 12-SAT12-0031, 14-SAT14-0009 & 16-SAT16-0002. The development and testing of focal planes were supported by the Gordon and Betty Moore Foundation at Caltech. Readout electronics were supported by a Canada Foundation for Innovation grant to UBC. The computations in this paper were run on the Odyssey cluster supported by the FAS Science Division Research Computing Group at Harvard University. The analysis effort at Stanford and SLAC is partially supported by the U.S. DoE Office of Science. We thank the staff of the U.S. Antarctic Program and in particular the South Pole Station without whose help this research would not have been possible. Tireless administrative support was provided by Kathy Deniston, Sheri Stoll, Irene Coyle, Donna Hernandez, and Dana Volponi. We are grateful our BICEP/Keck Array collaboration colleagues for useful discussions and technical feedback.
Group:Astronomy Department
Funding AgencyGrant Number
W. M. Keck FoundationUNSPECIFIED
JPL Research and Technology Development FundUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Harvard UniversityUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Subject Keywords:BICEP Array, Cosmic Microwave Background, Detector, Corrugations, Beam Systematic
Series Name:Proceedings of SPIE
Issue or Number:10708
Record Number:CaltechAUTHORS:20190108-104453619
Persistent URL:
Official Citation:A. Soliman, P. A. R. Ade, Z. Ahmed, R. W. Aikin , K. D. Alexander, D. Barkats, S. J. Benton, C. A. Bischoff, J. J. Bock, R. Bowens-Rubin, J. A. Brevik, I. Buder, E. Bullock, V. Buza, J. Connors, J. Cornelison, B. P. Crill, M. Crumrine, M. Dierickx, L. Duband, C. Dvorkin, J. P. Filippini, S. Fliescher, J. A. Grayson, G. Hall, M. Halpern, S. Harrison, S. R. Hildebrandt, G. C. Hilton, H. Hui, K. D. Irwin, J. H. Kang, K. S. Karkare, E. Karpel, J. P. Kaufman, B. G. Keating, S. Kefeli, S. A. Kernasovskiy, J. M. Kovac, C. L. Kuo, K. Lau, N. A. Larsen, E. M. Leitch, M. Lueker, K. G. Megerian, L. Moncelsi, T. Namikawa, C. B. Netterfield, H. T. Nguyen, R. O'Brient, R. W. Ogburn, S. Palladino, C. Pryke, B. Racine, S. Richter, R. Schwarz, A. Schillaci, C. D. Sheehy, T. St. Germaine, Z. K. Staniszewski, B. Steinbach, R. Sudiwala, G. P. Teply, K. L. Thompson, J. E. Tolan, C. Tucker, A. D. Turner, C. Umiltà, J. Van Zyl, A. G. Vieregg, A. Wandui, A. C. Weber, D. V. Wiebe, J. Willmert, C. L. Wong, W. L. K. Wu, E. Yang, K. W. Yoon, C. Zhang, "Design and performance of wide-band corrugated walls for the BICEP Array detector modules at 30/40 GHz," Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 107082G (16 July 2018); doi: 10.1117/12.2312942
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92135
Deposited By: Tony Diaz
Deposited On:08 Jan 2019 20:54
Last Modified:16 Nov 2021 03:47

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