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arxiv: 0908.1464 · v1 · submitted 2009-08-11 · 🌌 astro-ph.IM · astro-ph.CO

Antenna-coupled TES bolometer arrays for CMB polarimetry

C. L. Kuo , J. J. Bock , J. A. Bonetti , J. Brevik , G. Chattopadhyay , P. K. Day , S. Golwala , M. Kenyon
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A. E. Lange H. G. LeDuc H. Nguyen R. W. Ogburn A. Orlando A. Trangsrud A. Turner G. Wang J. Zmuidzinas
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classification 🌌 astro-ph.IM astro-ph.CO
keywords arrayspolarizationantenna-coupledbandsbeamdevicesantennasarchitecture
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We describe the design and performance of polarization selective antenna-coupled TES arrays that will be used in several upcoming Cosmic Microwave Background (CMB) experiments: SPIDER, BICEP-2/SPUD. The fully lithographic polarimeter arrays utilize planar phased-antennas for collimation (F/4 beam) and microstrip filters for band definition (25% bandwidth). These devices demonstrate high optical efficiency, excellent beam shapes, and well-defined spectral bands. The dual-polarization antennas provide well-matched beams and low cross polarization response, both important for high-fidelity polarization measurements. These devices have so far been developed for the 100 GHz and 150 GHz bands, two premier millimeter-wave atmospheric windows for CMB observations. In the near future, the flexible microstrip-coupled architecture can provide photon noise-limited detection for the entire frequency range of the CMBPOL mission. This paper is a summary of the progress we have made since the 2006 SPIE meeting in Orlando, FL.

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