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Modeling and characterization of the SPIDER half-wave plate

Bryan, Sean A., Ade, Peter A. R., Amiri, Mandana, Benton, Steve, Bihary, Richard, Bock, James J., Bond, J. Richard, Bonetti, Joseph A., Chiang, H. Cynthia, Contaldi, Carlo R., Crill, Brendan P., O'Dea, Daniel, Dore, Olivier, Farhang, Marzieh, Filippini, Jeffrey P., Fissel, Laura, Gandilo, Natalie, Golwala, Sunil, Gudmundsson, Jon E., Hasselfield, Matthew, Halpern, Mark, Helson, Kyle R., Hilton, Gene, Holmes, Warren, Hristov, Viktor V., Irwin, Kent D., Jones, William C., Kuo, Chao Lin, MacTavish, Carrie J., Mason, Peter, Morford, Tracy, Montroy, Thomas E., Netterfield, C. Barth, Rahlin, Alexandra S., Reintsema, Carl D., Riley, Daniel, Ruhl, John E., Runyan, Marcus C., Schenker, Matthew A., Shariff, Jamil, Soler, Juan Diego, Transrud, Amy, Tucker, Rebecca, Tucker, Carole and Turner, Anthony 2010. Modeling and characterization of the SPIDER half-wave plate. Presented at: Millimeter, submillimeter, and far-infrared detectors and instrumentation for astronomy V, San Diego, CA, USA, 29 June-2 July 2010. Published in: Holland, Wayne S. and Zmuidzinas, Jonas eds. Proceedings of the SPIE conference on Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V held in San Diego, CA 29 June 2010. Proceedings of SPIE , vol. 7741. Bellingham, WA: SPIE, 77412B. 10.1117/12.857837

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Spider is a balloon-borne array of six telescopes that will observe the Cosmic Microwave Background. The 2624 antenna-coupled bolometers in the instrument will make a polarization map of the CMB with approximately one-half degree resolution at 145 GHz. Polarization modulation is achieved via a cryogenic sapphire half-wave plate (HWP) skyward of the primary optic. We have measured millimeter-wave transmission spectra of the sapphire at room and cryogenic temperatures. The spectra are consistent with our physical optics model, and the data gives excellent measurements of the indices of A-cut sapphire. We have also taken preliminary spectra of the integrated HWP, optical system, and detectors in the prototype Spider receiver. We calculate the variation in response of the HWP between observing the CMB and foreground spectra, and estimate that it should not limit the Spider constraints on inflation.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: SPIE
ISBN: 9780819482310
ISSN: 0277-786X
Last Modified: 04 Jun 2017 04:07

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