Cosmic Microwave Background


Installing one of the five Keck Receivers.

Research Description

We are interested in answering some of the biggest and most exciting questions about the nature of the Universe. What was the Universe like at the beginning of time? What physical processes drove the origin of our Universe, and how can these explain its present-day structure and composition? Through precision measurements of the Cosmic Microwave Background (CMB), we directly explore the Universe as it was shortly after the Big Bang, and hope to solve some of most compelling questions of cosmology that are accessible to observations today. Learn more at the project website.

Keck Array Overview

The Keck Array is a suite of telescopes designed to measure the Cosmic Microwave Background polarization at high precision in search of the B-mode signature of inflation. Each Keck telescope duplicates the BICEP2 detector and optical design inside a compact, pulse tube cooled cryostat. This design allows up to five identical telescopes to be deployed on the DASI mount, located at the Martin A. Pomerantz Observatory at Amundsen-Scott South Pole Station. The Keck Array was successfully deployed during the austral summer of 2010-2011. Three receivers are currently observing, all at 150 GHz. Two more receivers are scheduled for deployment in 2011-2012 and will operate through 2015, measuring CMB B-mode polarization to fundamental background limits at multiple frequencies.