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.
Original language | English |
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Title of host publication | host publication |
Volume | 8452 |
Publication status | Published - 2012 |
Event | Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series - Duration: 1 Jan 1824 → … http://adsabs.harvard.edu/abs/2012SPIE.8452E..0IO |
Conference
Conference | Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series |
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Period | 1/01/24 → … |
Internet address |