Orateur
Description
CMB-S4 is conceived by a broad community as the path forward to realizing the enormous potential of CMB measurements for understanding the origin and evolution of the Universe, from the highest energies at the dawn of time through the growth of structure to the present day. The most efficient strategy to reach these science goals is to combine two complementary sky surveys: an ultra-deep over a small fraction of the sky to test models of inflation; and wide-deep survey covering the largest possible fraction of the sky to address a broad range of topics in astrophysics and fundamental physics. Owing to restrictions that NSF has imposed on the deployment of new experiments to the South Pole at the present time, the funding agencies have requested that the CMB-S4 project develop a instrument configuration in which both surveys can be conducted from the high Atacama desert in Chile. CMB-S4 is performing simulations and design studies to reconfigure the experiment. In this talk, we discuss ongoing work, future prospects, and outline a potential Chile-only design that could achieve the CMB-S4 science goals.
