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Paper: A Detector for Cosmic Microwave Background Polarimetry
Volume: 449, Astronomical Polarimetry 2008: Science from Small to Large Telescopes
Page: 81
Authors: Chuss, D.; Cao, N.; Denis, K.; Hsieh, W.; Moseley, S.; Schneider, G.; Stevenson, T.; Travers, D.; K.U-Yen; Wollack, E.
Abstract: We present preliminary design and development work on polarized detectors intended to enable Cosmic Microwave Background polarization measurements that will probe the first moments of the universe. The ultimate measurement will be challenging, requiring background-limited detectors and good control of systematic errors. A large collection of single-mode polarized detectors will eventually be required for the reliable detection of the weak polarized signature that is expected to result from gravitational waves produced by cosmic inflation. Toward this end, we are integrating the beam control of HE11 feedhorns with the sensitivity of transition-edge sensors. The coupling between these two devices is achieved via waveguide probe antennas and superconducting microstrip lines. This implementation allows band-pass filters to be incorporated on the detector chip. This focal plane prototype is an important step along the path to this detection, resulting in a capability that will enable various future high-performance instrument concepts.
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