A new type of caesium clock: a laser-cooled atomic fountain.

Details A new type of caesium clock: a laser-cooled atomic fountain. A new type of caesium clock: a laser-cooled atomic fountain.

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995rvge....5...23c&link_type=abstract

Rev. Gen. Electr., No. 5, p. 23 - 27

Computer Science

Performance

Atomic Clocks

Scientific paper

In recent years, progress has been made in the field of cooling neutral atoms using a laser. An initial application is the construction of a new type of atomic clock. Today it is easy to produce a gas of caesium atoms at a temperature of a few microkelvins, corresponding to a mean square velocity of the order of 1 cm/s; all that is needed is two laser diodes forming an optical soup in a low pressure caesium cell. In the longer term, these cooled atoms will make it possible to build clocks whose performance will be one or two orders of magnitude better than those that exist at present. A prototype caesium clock using cold atoms has been operating for over a year that the LPTF in the Paris observatory. This article describes its design principles and gives a brief presentation of the results obtained so far.

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