Experimental performance comparison of two polarimeter techniques for CMB applications

B. Maffei; G. Pisano; M. W. Ng; V. C. Haynes

doi:10.1117/12.926911

24 September 2012 Experimental performance comparison of two polarimeter techniques for CMB applications

B. Maffei, G. Pisano, M. W. Ng, V. C. Haynes

Proceedings Volume 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI; 845227 (2012) https://doi.org/10.1117/12.926911
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

Citation Download Citation

B. Maffei, G. Pisano, M. W. Ng, and V. C. Haynes "Experimental performance comparison of two polarimeter techniques for CMB applications", Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 845227 (24 September 2012); https://doi.org/10.1117/12.926911

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