The heart of WWV and WWVB operation in Fort Collins centers around the “Screen Room,” a Faraday cage-shielded room housing the station’s cesium frequency standards and time code generators.

Clearly that’s not good enough for a clock at CERN, the European Laboratory for Nuclear Research, where [Daniel] works as an RF engineer. With access to a 10-MHz timebase from a cesium fountain ...

The clock relies on cesium atoms, which oscillate between quantum states at a frequency of over 9 billion times per second. NIST-F4 uses lasers to cool a ball of cesium atoms to near absolute zero ...

Microchip Technology has released the 5071B cesium atomic clock that can perform autonomous timekeeping for months in the event of GNSS denials. The 5071B is the next-generation commercial cesium ...

A new atomic clock at the National Institute of Standards and Technology in Boulder is helping researchers count seconds to ...

NIST-F4 measures an unchanging frequency in the heart of cesium atoms, the internationally agreed-upon basis for defining the second since 1967. The clock is based on a "fountain" design that ...

Atomic clocks base their timekeeping on measuring the exact vibrations of individual atoms to designate a single second. To do this, a high-powered laser light is trained on an atom of cesium-133 ...