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Ambient Temperature Work Advances Optical Clock

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BRAUNSCHWEIG, Germany, Jan. 3, 2013 — An optical clock with neutral strontium atoms is considered a strong candidate for the definition of a “new” second, thanks to scientists who have measured, for the first time, the most important uncertainty factor: ambient temperature. The influence of ambient temperature previously could be derived only theoretically, but the technique developed by scientists at Physikalisch-Technische Bundesanstalt (PTB) has reduced the measurement uncertainty by one order of magnitude. The results might spark interest in geodesy and in fundamental physical research, but more importantly,...Read full article

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    Published: January 2013
    Glossary
    ambient temperature
    The prevailing temperature in the immediate vicinity of the object; the temperature of its environment.
    atomic clock
    An atomic clock is a highly precise timekeeping device that uses the vibrations or oscillations of atoms as a reference for measuring time. The most common type of atomic clock uses the vibrations of atoms, typically cesium or rubidium atoms, to define the length of a second. The principle behind atomic clocks is based on the fundamental properties of atoms, which oscillate at extremely stable and predictable frequencies. The primary concept employed in atomic clocks is the phenomenon of...
    capacitor
    A device that accumulates and stores electrical energy to introduce capacitance into a circuit. Basically, it is composed of two electrical conductors, separated by an insulating medium.
    ambient temperatureatomic clockBasic Sciencecapacitorcesium clockEuropeGermanymicrowave radiationoptical clocksoptical radiationOpticsPhysikalisch-Technische BundesanstaltPTBResearch & Technologystrontium clockTest & Measurement

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