4-8 August 2015
America/Detroit timezone

SPT-3G: The Next Generation Receiver for Polarized Cosmic Microwave Background Measurements with the South Pole Telescope

5 Aug 2015, 14:18
18m
Michigan (Michigan League)

Michigan

Michigan League

Cosmology and Dark Energy Experiment AstroParticle, Cosmology, Dark Matter Searches, and CMB

Speaker

Amy Bender (Argonne National Laboratory)

Description

The South Pole Telescope is a millimeter-wavelength telescope dedicated to observations of the Cosmic Microwave Background (CMB). The next generation upgraded receiver, known as SPT-3G, is scheduled for deployment in early 2016. SPT-3G will have a focal plane of 2,710 pixels. Each pixel contains six transition-edge sensor (TES) bolometers, sensitive to orthogonal linear polarizations and three frequency bands (90, 150, 220 GHz), for a total of 16,260 detectors in the focal plane. With an order of magnitude more TES bolometers than the current receiver, SPT-3G will open a new regime of sensitivity in high-resolution mapping of the CMB. After four years of observation of 2500 square degrees of the sky, SPT-3G will map the B-mode polarization signature from gravitational lensing of the CMB with high signal-to-noise, a signal that is currently only statistically detected. Lensing B-modes trace the growth of large-scale structure in the universe, which is influenced by neutrino mass. SPT-3G will constrain the sum of neutrino masses with an uncertainty of ~ 0.06 eV, an significant step towards differentiating between hierarchies. Additionally, SPT-3G will detect thousands of new galaxy clusters, extending to lower mass and higher redshifts, through the Sunyaev-Zel'dovich effect. This sample will enable SPT-3G to place improved constraints on the evolution of dark energy, using the cluster abundance to probe the expansion history of the universe. I will discuss these opportunities as well as giving an overview of the SPT-3G detector and readout architecture, including receiver integration status and recent laboratory performance.
Oral or Poster Presentation Oral

Primary author

Amy Bender (Argonne National Laboratory)

Co-author

on behalf of the SPT-3G Collaboration (SPT-3G Partner Institutions)

Presentation Materials

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