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Proceedings Paper

Experimental performance comparison of two polarimeter techniques for CMB applications
Author(s): B. Maffei; G. Pisano; M. W. Ng; V. C. Haynes
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Paper 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.

Paper Details

Date Published: 24 September 2012
PDF: 7 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 845227 (24 September 2012); doi: 10.1117/12.926911
Show Author Affiliations
B. Maffei, The Univ. of Manchester (United Kingdom)
G. Pisano, The Univ. of Manchester (United Kingdom)
M. W. Ng, The Univ. of Manchester (United Kingdom)
V. C. Haynes, The Univ. of Manchester (United Kingdom)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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