
New Atomic Fountain Clock Joins Elite Group That Keeps the World on Time
NIST scientists Greg Hoth (left) and Vladislav Gerginov work on NIST-F4, NIST’s new cesium fountain clock. Credit: R. Eskalis/NIST Clocks on Earth are ticking a bit more regularly thanks to NIST-F4, a new atomic clock at the National Institute of Standards …