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

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

2010-06-25

arxiv.org/abs/1006.5049v1

Proc. SPIE, Vol. 7741, 77411S (2010)

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

21 pages, 7 figures

Scientific paper

10.1117/12.857464

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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