Sentences with phrase «caesium clock»

The signal is so incredibly regular that the latest caesium clock recently brought online in the US will not lose or gain a second in about 300 million years.

Timekeeping institutes around the world each have their own caesium clocks.

Caesium clocks are so accurate because their sources of error have been identified and most of them eliminated.

Not exact matches

The NPL's atomic clocks measure how often a caesium atom's electrons jump between two energy levels — a little more than 9 billion jumps equal one second.

The second is currently defined by caesium atomic clocks, but optical clocks promise higher precision because their atoms oscillate at the frequencies of light rather than in the microwave band, so they can slice time into smaller intervals.

A new generation of atomic tickers, known as optical clocks, have just wrested the record for accuracy from the ensembles of oscillating caesium atoms that held it for half a century.

And because hydrogen molecules consist of just a handful of particles, compared with the larger caesium atoms used in atomic clocks, it would be easier to do theoretical calculations and compare them with real experiments, the team says.

The two clocks, one based on caesium atoms and the other on hydrogen, will communicate with a network of clocks back on Earth to compare performance across continents at a level that is equivalent to 10 trillionths of a second.

The standard clock uses caesium atoms, which emit microwaves precisely 9,192,631,770 times per second.

Most atomic clocks use atoms of the isotope caesium - 133.

• In a caesium atomic clock, 9 billion cycles per second (9 gigahertz) is the frequency of radiation emitted when...

But these clocks are constrained in how precisely they can divide time because when caesium electrons jump from a certain state to another they emit radiation with a frequency of only 9 giga - hertz, or 9 billion cycles per second.

But there is a catch: the ytterbium clock is still not as accurate as the caesium one.