Latest Atomic clock Stories

JILA Team Demonstrates 'A New Way of Lasing': A 'Superradiant' Laser
2012-04-06 03:23:58

[ Watch the Video ] Physicists at JILA have demonstrated a novel “superradiant” laser design, which has the potential to be 100 to 1,000 times more stable than the best conventional visible lasers. This type of laser could boost the performance of the most advanced atomic clocks and related technologies, such as communications and navigation systems as well as space-based astronomical instruments. Described in the April 5, 2012, issue of Nature,* the JILA laser prototype...

Image 1 - New Blueprint To Keep Nuclear Clock Accurate Over Billions Of Years
2012-03-20 04:00:26

A clock accurate to within a tenth of a second over 14 billion years — the age of the universe — is the goal of research being reported this week by scientists from three different institutions. To be published in the journal Physical Review Letters, the research provides the blueprint for a nuclear clock that would get its extreme accuracy from the nucleus of a single thorium ion. Such a clock could be useful for certain forms of secure communication — and perhaps of...

Nuclear Clock Keeps Time With The Universe
2012-03-10 05:58:16

As time passes, new technology evolves in order to keep time. Soon the trusty atomic clock may be replaced by a nuclear clock, which keeps time to 1/20th of a second in 14 billion years. In early time, the sun or grains of sand in an hourglass kept time. Over the years technology allowed for clocks you could wind, watches with quartz oscillators, and more recently the atomic clock. The atomic clock uses an electronic transition frequency to keep time. Considered quite accurate, atomic...

Scientists Confirm First 'Frequency Comb' To Probe Ultraviolet Wavelengths
2012-02-02 05:00:46

Physicists at JILA have created the first "frequency comb" in the extreme ultraviolet band of the spectrum, high-energy light less than 100 nanometers (nm) in wavelength. Laser-generated frequency combs are the most accurate method available for precisely measuring frequencies, or colors, of light. In reaching the new band of the spectrum, the JILA experiments demonstrated for the first time a very fine mini-comb-like structure within each subunit, or harmonic, of the larger comb, drastically...

2012-02-01 23:43:34

The ability to accurately measure a second in time is at the heart of many essential technologies; the most recognizable may be the Global Positioning System (GPS). In a paper accepted for publication in the AIP's journal Review of Scientific Instruments, a researcher at the National Institutes of Standards and Technology (NIST) and the University of Colorado at Boulder discusses how achieving a stable and coordinated global measure of time requires more than just the world's most accurate...

Leap Seconds Get A Three Year Reprieve
2012-01-20 09:28:53

An attempt to eliminate leap seconds and permanently change how time is measured has been postponed until 2015 by the International Telecommunications Union. ITU Radio-communication Assembly delegates on Thursday were unable to come to an agreement on whether to stop adding leap seconds to the world´s atomic clocks to keep them synchronized with Earth´s rotational cycles. The ITU will now spend the next three years conducting further studies “to ensure that all the...

Are Leap Seconds Becoming A Thing Of The Past?
2012-01-18 09:32:49

For at least ten years experts have been debating the use of leap seconds, tiny bits of time added to calendars and clocks in hopes of reconciling the difference between atomic time used by computer systems and time as defined by measuring the Earth´s movement around the sun and its daily, but slightly slowing, rotation. Governments have been split on the issue but are expected to make a decision this week at a UN telecom meeting, says the International Telecommunications Union (ITU)...

Word of the Day
  • Nautical, the visiting and carousing of sailors in the Greenland ships.
This word is apparently from a confusion of two similar Dutch words: 'mallemerok,' a foolish woman, and 'mallemok,' a name for some persons among the crew of a whaling vessel.