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arxiv 1210.7768 v1 pith:OHV5I5S2 submitted 2012-10-29 astro-ph.IM

The POLARBEAR Experiment

Z. Kermish , P. Ade , A. Anthony , K. Arnold , D. Barron , D. Boettger , J. Borrill , S. Chapman
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Y. Chinone M. A. Dobbs J. Errard G. Fabbian D. Flanigan G. Fuller A. Ghribi W. Grainger N. Halverson M. Hasegawa K. Hattori M. Hazumi W. L. Holzapfel J. Howard P. Hyland A. Jaffe B. Keating T. Kisner A. T. Lee M. Le Jeune E. Linder M. Lungu F. Matsuda T. Matsumura X. Meng N. J. Miller H. Morii S. Moyerman M. J. Myers H. Nishino H. Paar E. Quealy C. L. Reichardt P. L. Richards C. Ross A. Shimizu M. Shimon C. Shimmin M. Sholl P. Siritanasak H. Spieler N. Stebor B. Steinbach R. Stompor A. Suzuki T. Tomaru C. Tucker O. Zahn
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keywords polarbearexperimentalongb-modecharacterizationchilefocalgravitational
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We present the design and characterization of the POLARBEAR experiment. POLARBEAR will measure the polarization of the cosmic microwave background (CMB) on angular scales ranging from the experiment's 3.5 arcminute beam size to several degrees. The experiment utilizes a unique focal plane of 1,274 antenna-coupled, polarization sensitive TES bolometers cooled to 250 milliKelvin. Employing this focal plane along with stringent control over systematic errors, POLARBEAR has the sensitivity to detect the expected small scale B-mode signal due to gravitational lensing and search for the large scale B-mode signal from inflationary gravitational waves. POLARBEAR was assembled for an engineering run in the Inyo Mountains of California in 2010 and was deployed in late 2011 to the Atacama Desert in Chile. An overview of the instrument is presented along with characterization results from observations in Chile.

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