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The expected increase in sensitivity for CMB-S4
CMB-S4 Science Book, First Edition (arXiv:1610.02743)
Schematic timeline showing the expected increase in sensitivity (μK2) and the corresponding improvement for a few of the key cosmological parameters for Stage-3, along with the threshold-crossing aspirational goals targeted.
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Current status of CMB-S4CMB-S4: Next Generation CMB Experiment

The 'Stage-4' ground-based cosmic microwave background (CMB) experiment, CMB-S4, consisting of dedicated telescopes equipped with highly sensitive superconducting cameras operating at the South Pole, the high Chilean Atacama plateau, and possibly northern hemisphere sites, will provide a dramatic leap forward in our understanding of the fundamental nature of space and time and the evolution of the Universe. CMB-S4 will be designed to cross critical thresholds in testing inflation, determining the number and masses of the neutrinos, constraining possible new light relic particles, providing precise constraints on the nature of dark energy, and testing general relativity on large scales.

Current & Upcoming Events
Aug 24 - 25, 2017Harvard-2017: Collaboration Workshop

Latest News
Mar 1, 2017SLAC-2017 Collaboration Workshop.
Jan 6, 2017Joint DOE and NSF Concept Definition Task Force has been formed
Oct 10, 2016CMB-S4 Science Book, First Edition (arXiv:1610.02743)
Sep 21, 2016UChicago 2016 Collaboration Workshop
Mar 7, 2016LBNL-2016 Collaboration Workshop
Sep 21, 2015UMICH-2015 Collaboration Workshop