15 July 2010 ACTPol: a polarization-sensitive receiver for the Atacama Cosmology Telescope
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The six-meter Atacama Cosmology Telescope (ACT) in Chile was built to measure the cosmic microwave background (CMB) at arcminute angular scales. We are building a new polarization sensitive receiver for ACT (ACTPol). ACTPol will characterize the gravitational lensing of the CMB and aims to constrain the sum of the neutrino masses with ~ 0.05 eV precision, the running of the spectral index of inflation-induced fluctuations, and the primordial helium abundance to better than 1 %. Our observing fields will overlap with the SDSS BOSS survey at optical wavelengths, enabling a variety of cross-correlation science, including studies of the growth of cosmic structure from Sunyaev-Zel'dovich observations of clusters of galaxies as well as independent constraints on the sum of the neutrino masses. We describe the science objectives and the initial receiver design.
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M. D. Niemack, M. D. Niemack, P. A. R. Ade, P. A. R. Ade, J. Aguirre, J. Aguirre, F. Barrientos, F. Barrientos, J. A. Beall, J. A. Beall, J. R. Bond, J. R. Bond, J. Britton, J. Britton, H. M. Cho, H. M. Cho, S. Das, S. Das, M. J. Devlin, M. J. Devlin, S. Dicker, S. Dicker, J. Dunkley, J. Dunkley, R. Dünner, R. Dünner, J. W. Fowler, J. W. Fowler, A. Hajian, A. Hajian, M. Halpern, M. Halpern, M. Hasselfield, M. Hasselfield, G. C. Hilton, G. C. Hilton, M. Hilton, M. Hilton, J. Hubmayr, J. Hubmayr, J. P. Hughes, J. P. Hughes, L. Infante, L. Infante, K. D. Irwin, K. D. Irwin, N. Jarosik, N. Jarosik, J. Klein, J. Klein, A. Kosowsky, A. Kosowsky, T. A. Marriage, T. A. Marriage, J. McMahon, J. McMahon, F. Menanteau, F. Menanteau, K. Moodley, K. Moodley, J. P. Nibarger, J. P. Nibarger, M. R. Nolta, M. R. Nolta, L. A. Page, L. A. Page, B. Partridge, B. Partridge, E. D. Reese, E. D. Reese, J. Sievers, J. Sievers, D. N. Spergel, D. N. Spergel, S. T. Staggs, S. T. Staggs, R. Thornton, R. Thornton, C. Tucker, C. Tucker, E. Wollack, E. Wollack, K. W. Yoon, K. W. Yoon, "ACTPol: a polarization-sensitive receiver for the Atacama Cosmology Telescope", Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 77411S (15 July 2010); doi: 10.1117/12.857464; https://doi.org/10.1117/12.857464


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