Advanced ACTPol Cryogenic Detector Arrays and Readout
Abstract
Advanced ACTPol is a polarization-sensitive upgrade for the 6 m aperture Atacama Cosmology Telescope (ACT), 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 (CMB) anisotropies -- imaged in intensity and polarization at few arcminute-scale resolution -- will enable precision cosmological constraints and also a wide 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 Advanced ACTPol receiver will be a significant upgrade to the ACTPol receiver, including four new multichroic arrays of cryogenic, feedhorn-coupled AlMn transition edge sensor (TES) 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 (SQUIDs) 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 Advanced ACTPol cryogenic detector arrays.
Cite
@article{arxiv.1510.02809,
title = {Advanced ACTPol Cryogenic Detector Arrays and Readout},
author = {S. W. Henderson and R. Allison and J. Austermann and T. Baildon and N. Battaglia and J. A. Beall and D. Becker and F. De Bernardis and J. R. Bond and E. Calabrese and S. K. Choi and K. P. Coughlin and K. T. Crowley and R. Datta and M. J. Devlin and S. M. Duff and R. Dunner and J. Dunkley and A. van Engelen and P. A. Gallardo and E. Grace and M. Hasselfield and F. Hills and G. C. Hilton and A. D. Hincks and R. Hlozek and S. P. Ho and J. Hubmayr and K. Huffenberger and J. P. Hughes and K. D. Irwin and B. J. Koopman and A. B. Kosowsky and D. Li and J. McMahon and C. Munson and F. Nati and L. Newburgh and M. D. Niemack and P. Niraula and L. A. Page and C. G. Pappas and M. Salatino and A. Schillaci and B. L. Schmitt and N. Sehgal and B. D. Sherwin and J. L. Sievers and S. M. Simon and D. N. Spergel and S. T. Staggs and J. R. Stevens and R. Thornton and J. Van Lanen and E. M. Vavagiakis and J. T. Ward and E. J. Wollack},
journal= {arXiv preprint arXiv:1510.02809},
year = {2016}
}
Comments
9 pages, 3 figures, conference proceedings submitted to Journal of Low Temperature Physics