Title :
An even better atomic clock
Author :
Lodewyck, Jerome
Abstract :
In 1967, time underwent a dramatic shift. That was the year the key increment of time- the second-went from being defined as a tiny fraction of a year to something much more stable and fundamental: the time it takes for radiation absorbed and emitted by a cesium atom to undergo a certain number of cycles.
Keywords :
atomic clocks; caesium; Cs; atomic clock; cesium atom; radiation absorption; time increment; Accuracy; Atom optics; Atomic clocks; Atomic measurements; Frequency measurement; Noise;
Journal_Title :
Spectrum, IEEE
DOI :
10.1109/MSPEC.2014.6905489
