Experimental performance comparison of two polarimeter techniques for CMB applications

Holland, Wayne S., Maffei, Bruno, Pisano, Giampaolo ORCID: https://orcid.org/0000-0003-4302-5681, 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 , vol.8452 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:	Publisher
Last Modified:	25 Oct 2022 09:55
URI:	https://orca.cardiff.ac.uk/id/eprint/60491

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