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Experimental performance comparison of two polarimeter techniques for CMB applications

Holland, Wayne S., Maffei, Bruno, Pisano, Giampaolo, Ng, M. W. and Haynes, V. C. 2012. Experimental performance comparison of two polarimeter techniques for CMB applications. Presented at: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, Amsterdam, The Netherlands, 3-6 July 2012. Published in: Holland, Wayne S. and Zmuidzinas, Jonas eds. Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI (Proceedings). Proceedings of the SPIE Bellingham, WA: SPIE, p. 845227. 10.1117/12.926911

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Abstract

Polarisation modulators are necessary for present and next generations of CMB polarisation experiments. Because of the very faint B-mode signal expected, these instruments have not only to be extremely sensitive but also to have low and well-characterised systematic effects. The beam RF characterisation in the W-band (75-110 GHz) of two polarimeter pixels using the same corrugated horn has been performed using two different modulators: a waveguide rotator modulator and a quasi-optical half-wave plate. Coand cross-polarisation beam measurements are presented together with the systematic effects introduced by both modulators.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Equipment and services; Modulators; Polarization; Waveguides
Publisher: SPIE
ISBN: 9780819491534
ISSN: 0277-786X
Related URLs:
Last Modified: 04 Jun 2017 06:28
URI: http://orca-mwe.cf.ac.uk/id/eprint/60491

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