SPIDER: A Balloon-borne Large-scale CMB Polarimeter
arXiv:0807.1548 · doi:10.1117/12.787446
Abstract
Spider is a balloon-borne experiment that will measure the polarization of the Cosmic Microwave Background over a large fraction of a sky at 1 degree resolution. Six monochromatic refracting millimeter-wave telescopes with large arrays of antenna-coupled transition-edge superconducting bolometers will provide system sensitivities of 4.2 and 3.1 micro K_cmb rt s at 100 and 150 GHz, respectively. A rotating half-wave plate will modulate the polarization sensitivity of each telescope, controlling systematics. Bolometer arrays operating at 225 GHz and 275 GHz will allow removal of polarized galactic foregrounds. In a 2-6 day first flight from Alice Springs, Australia in 2010, Spider will map 50% of the sky to a depth necessary to improve our knowledge of the reionization optical depth by a large factor.
To appear in Proceedings of SPIE Volume 7010, Editors: Jacobus M. Oschmann, Jr.; Mattheus W. M. de Graauw; Howard A. MacEwen, "Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter"
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