Now, just a few weeks later, this thorium transition was successfully applied in practice: TU Wien and JILA/NIST (USA) succeeded in combining a high-precision optical atomic clock with a high-energy laser system and successfully coupled it with a crystal containing thorium atomic nuclei. The th...
atomic clock An extremely precise clock whose rate is controlled by the vibration of particular atoms or molecules whose frequency does not change. The standard kind of atomic clock, which is based on the vibrations of cesium atoms, gains or loses less than one second in three million years. ...
In contrast, the NIST optical clock makes use of interactions between ultraviolet radiation and a single mercury ion. Terrific timekeeper: optical atomic clock beats world standard The NIST ATP project will develop prototype microscale assemblers using microelectromechanical systems (MEMS), extend the cap...
Terrific timekeeper: optical atomic clock beats world standard We believe that all businesses dependent on microtechnology, nanotechnology, and miniaturization will benefit from our proposed program and we applaud the NIST ATP for having the foresight to stimulate the growth of this crucial and emerging...
ref : http://www.bldrdoc.gov/doc-tour/atomic_clock.html 49825 95-04-18 22:24:11 50 0 0 50.0 UTC(NIST) * | | | | | | | | | These are the last + | | | | | | | | five digits of the | | | | | | | | Modified Julian Date | | | | | | | | ...
ClockWatch Pro keeps your computer's clock within +/- one second of Coordinated Universal Time (UTC) by regularly comparing it to the atomic clock—the world's most accurate clock—at the National Institute of Standards and Technology (NIST) via the Internet. ClockWatch Pro maintains accurate ...
The article discusses the metrology of time and looks at atomic clocks such as the ytterbium optical lattice clock at the U.S. National Institute of Standards and Technology (NIST), a mercury clock proposed in the journal "Reviews of Modern Physics" by physicists Hidetoshi Katori and Andrei ...
Atomic dipoles on a lattice interact to produce an observable spatially varying frequency shift (shown as blue to red). Credit: Steven Burrows/Ye Group In groundbreaking research, JILA and NIST scientists have enhanced the understanding of atomic clock precision by studying cooperative Lamb shifts in...
NIST Time Widget to link to an HTML5 (no Flash), widget-only page, go to: http:/ time.gov/widget.html. This widget is a public service provided by the Time and Frequency Division. Of the National Institute of Standards and Technology (NIST). It is a web clock showing the official ...
The Loran-C clock comprises a high-stability crystal oscillator ... K.,Kalliomäki,P.,... - 《Radio Science》 被引量: 1发表: 1979年 Standards of time and frequency at the outset of the 21st century [Review] After 50 years of development, microwave atomic clocks based on cesium have ...