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SPIDER: a balloon-borne CMB polarimeter for large angular scales

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arxiv 1106.2158 v1 pith:LCGMGM3O submitted 2011-06-10 astro-ph.CO astro-ph.IM

SPIDER: a balloon-borne CMB polarimeter for large angular scales

J.P. Filippini , P.A.R. Ade , M. Amiri , S.J. Benton , R. Bihary , J.J. Bock , J.R. Bond , J.A. Bonetti
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S.A. Bryan B. Burger H.C. Chiang C.R. Contaldi B.P. Crill O. Dor\'e M. Farhang L.M. Fissel N.N. Gandilo S.R. Golwala J.E. Gudmundsson M. Halpern M. Hasselfield G. Hilton W. Holmes V.V. Hristov K.D. Irwin W.C. Jones C.L. Kuo C.J. MacTavish P.V. Mason T.E. Montroy T.A. Morford C.B. Netterfield D.T. O'Dea A.S. Rahlin C.D. Reintsema J.E. Ruhl M.C. Runyan M.A. Schenker J.A. Shariff J.D. Soler A. Trangsrud C. Tucker R.S. Tucker A.D. Turner
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keywords spiderpolarizationwillangularballoon-borneflightmissionachieve
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We describe SPIDER, a balloon-borne instrument to map the polarization of the millimeter-wave sky with degree angular resolution. Spider consists of six monochromatic refracting telescopes, each illuminating a focal plane of large-format antenna-coupled bolometer arrays. A total of 2,624 superconducting transition-edge sensors are distributed among three observing bands centered at 90, 150, and 280 GHz. A cold half-wave plate at the aperture of each telescope modulates the polarization of incoming light to control systematics. Spider's first flight will be a 20-30-day Antarctic balloon campaign in December 2011. This flight will map \sim8% of the sky to achieve unprecedented sensitivity to the polarization signature of the gravitational wave background predicted by inflationary cosmology. The Spider mission will also serve as a proving ground for these detector technologies in preparation for a future satellite mission.

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