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Advanced ACTPol Cryogenic Detector Arrays and ReadoutAdvanced ACTPol is a polarization-sensitive upgrade for the 6 m aperture Atacama Cosmology Telescope, adding new frequencies and increasing sensitivity over the previous ACTPol receiver. In 2016, Advanced ACTPol will begin to map approximately half the sky in five frequency bands (28-230 GHz). Its maps of primary and secondary cosmic microwave background anisotropies-imaged in intensity and polarization at few arcminute-scale resolution-will enable precision cosmological constraints and also awide array of cross-correlation science that probes the expansion history of the universe and the growth of structure via gravitational collapse. To accomplish these scientific goals, the AdvancedACTPol receiver will be a significant upgrade to the ACTPol receiver, including four new multichroic arrays of cryogenic, feedhorn-coupled AlMn transition edge sensor polarimeters (fabricated on 150 mm diameter wafers); a system of continuously rotating meta-material silicon half-wave plates; and a new multiplexing readout architecture which uses superconducting quantum interference devices and time division to achieve a 64-row multiplexing factor. Here we present the status and scientific goals of the Advanced ACTPol instrument, emphasizing the design and implementation of the AdvancedACTPol cryogenic detector arrays.
Document ID
20160006708
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Henderson, S.W.
(Cornell Univ. Ithaca, NY, United States)
Allison, R.
(Oxford Univ. Oxford, United Kingdom)
Austermann, J.
(National Inst. of Standards and Technology Boulder, CO, United States)
Baildon, T.
(Michigan Univ. Ann Arbor, MI, United States)
Battaglia, N.
(Princeton Univ. Princeton, NJ, United States)
Beall, J. A.
(National Inst. of Standards and Technology Boulder, CO, United States)
Becker, D.
(National Inst. of Standards and Technology Boulder, CO, United States)
De Bernardis, F.
(Cornell Univ. Ithaca, NY, United States)
Bond, J. R.
(Toronto Univ. Ontario, Canada)
Wollack, E. J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
May 31, 2016
Publication Date
March 28, 2016
Publication Information
Publication: Journal of Low Temperature Physics
Publisher: Springer
ISSN: 0022-2291
e-ISSN: 1573-7357
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN32121
Funding Number(s)
CONTRACT_GRANT: NNX14AB58G
CONTRACT_GRANT: NNX13AE56G
Distribution Limits
Public
Copyright
Other
Keywords
secondary cosmic microwave background anisotropies
cross-correlation science
Advanced ACTPol

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