ACTPol: A polarization-sensitive receiver for the Atacama Cosmology Telescope

Niemack, M. D.; Beall, J. A.; Britton J.; Cho H.M.; Hilton, G. C.; Hubmayr, J; Irwin K.D.; Nibarger J.P.; Yoon K.W.; Ade, P. A. R.; Tucker C.; Aguirre, J.; Devlin, M. J.; Dicker S.; Klein J.; et. al.

Keywords: particles, design, polarization, mass, sensors, cosmology, telescopes, helium, optical, infrared, detectors, microwave, gravitation, neutrino, correlation, elementary, lensing, astronomy, cryogenics, cosmic, Gravitational, backgrounds, Transition-edge, B-modes


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. © 2010 SPIE.

Más información

Título de la Revista: Proceedings of SPIE - The International Society for Optical Engineering
Volumen: 7741
Editorial: SPIE
Fecha de publicación: 2010