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Dielectrically embedded mesh half wave plate beam impact studies

Holland, Wayne S., Maffei, Bruno, Pisano, Giampaolo, Ng, M. W. and Haynes, V. C. 2012. Dielectrically embedded mesh half wave plate beam impact studies. 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, 84520K. 10.1117/12.926683

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Abstract

An alternative solution to classic birefringent Half Wave Plates (HWP), based on the photolithographic techniques, has been recently developed. This new device can offer a very good alternative as a polarisation modulator for future CMB polarisation instruments. However, the systematic effects that this HWP will introduce in the overall instrument need to be investigated. We present a preliminary study of the impact of this dielectrically embedded HWP on the beam shape of a corrugated horn and its performance across the beam. Using a W-band Vector Network Analyser, we measured the co- and crosspolarisation beams of the HWP-horn system and the differential phase-shift introduced by the HWP across the beam.

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; Networks; Phase shifts; Polarization; Wave plates
Publisher: SPIE
ISBN: 9780819491534
ISSN: 0277-786X
Related URLs:
Last Modified: 04 Jun 2017 06:28
URI: http://orca.cf.ac.uk/id/eprint/60493

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