Advanced ACTPol Cryogenic Detector Arrays and Readout

By S. Henderson, R. Allison, J. Austermann, T. Baildon, Nicholas Battaglia, J. Beall, D. Becker, F. Bernardis, J. Richard Bond, E. Calabrese and 47 more. Journal of Low Temperature Physics, 2015

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Advanced 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 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 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 Advanced ACTPol cryogenic detector arrays.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

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Citations in the corpus

PICO: Probe of Inflation and Cosmic Origins (2019, methodology): “The current baseline for PICO is to use a time-domain multiplexer (TDM), which assigns each detector’s address in a square matrix of simultaneously read columns, and sequentially cycles through each row of the array [269].”
Dark energy, α-attractors, and large-scale structure surveys (2017, methodology): “WMAP [64], Planck [65], ACTPol [66] and SPT-Pol [67], as well as the Stage III CMB experiments like AdvACT [68] and SPT-3G [69], and the future CMB Stage IV ground [70] and space based experiments such as LiteBIRD [71, 72], aiming at more precise measurements of the CMB B-modes, arguably the next le”
Sounds Discordant: Classical Distance Ladder and ΛCDM-based Determinations of the Cosmological Sound Horizon (2018, background): “Whether or not the solution to the discrepancy is cosmological, we can expect future observations of the CMB from SPT-3G and other future CMB surveys, such as AdvACT (Henderson et al. 2016), Simons Observatory (The Simons Observatory Collaboration et al. 2018), CMB-S4 (CMB-S4 Collaboration et al. 20”
The SPTpol Extended Cluster Survey (2019, background): “…LSST Science Collaboration et al. 2009; Euclid, Euclid Collaboration et al. 2019; WFIRST, Spergel et al. 2015), as well as SZ surveys by AdvACT (Henderson et al. 2016) and Simons Observatory (Simons Observatory Collaboration et al. 2019), with all of the SZ surveys ultimately setting the stage…”
The Simons Observatory: science goals and forecasts (2018, background): “The rapid progress of ground-based measurements in the last decade has been driven by the development of arrays of superconducting transition-edge sensor (TES) bolometers coupled to multiplexed readout electronics (Henderson et al. 2016; Posada et al. 2016; Suzuki et al. 2016; Hui et al. 2016).”
Exploring cosmic origins with CORE: Inflation (2016, unknown): “These include Keck Array/BICEP 3/Bicep Array [59], Spider [60], POLARBEAR-2 and the Simons Array [61], Advanced ACTpol [62], SPT-3G [63], Piper [64], CLASS [65], LSPE [66], QUIJOTE [67] and the US DOE Stage 4 (S4) experiment [68].”
Status of Neutrino Properties and Future Prospects—Cosmological and Astrophysical Constraints (2017, background): “Future CMB missions—including Advanced ACTPol [28], SPT-3G [29], CMB Stage-IV [30], Simons Observatory1, Simons Array [31], CORE [32], LiteBIRD [33], PIXIE [34]—will test the Universe over a wide range of scales with unprecedented accuracy.”
Measurements of the E -mode polarization and temperature- E -mode correlation of the CMB from SPT-3G 2018 data (2021, background): “[2] T. Louis, E. Grace, M. Hasselfield et al., The atacama cosmology telescope: Two-season ACTPol spectra and parameters, J. Cosmol.”