Author: Centre national de la recherche scientifique (France)
Publisher: Editions de Physique
ISBN:
Category : Atomic frequency standards
Languages : en
Pages : 562

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Book Description

Author: Andrea De Marchi
Publisher: Springer Science & Business Media
ISBN: 3642745016
Category : Science
Languages : en
Pages : 493

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Book Description
Since the previous Symposium, several exciting new developments and advances have occurred in the field of frequency standards and metrology. These include the first results on the long-tenn stability of a millisecond Pulsar, for which data 14 integrated over several years now show a stability of around 10- . Improvements in the understanding of various biases in Cesium beam standards promise accuracies in the low 14s for primary standards and in the low 13s for short commercial tubes, for which long tenn stabilities in low 14s have already been shown to be obtainable by accuracy improvement. Beams using optical pumping for state selection and for detection have been operated with excellent results, and more are being realized. Other new frequency standards which have appeared include a macroscopic rf trap with Mercury ions, which perfonns in the low 15s in one day, the sub millimeter metastable Magnesium beam, which has shown a short tenn stability 19 in the low 12s in one second and promises an accuracy of 10- , and the cold Hydrogen masers, which have such high stabilities that they cannot be measured with existing local oscillators. Prospects for future developments include laser manipulation of neutrals and spectroscopy of single ions at rest in a trap. Both these groups of techniques have great potential for unprecedented accuracy and short-and long-tenn stability, and new superior frequency standards are expected to be realizable in this way in the not too distant future.

Author:
Publisher:
ISBN:
Category : Frequency standards
Languages : en
Pages : 710

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Book Description

Author: Lute Maleki
Publisher: World Scientific
ISBN: 981283821X
Category : Science
Languages : en
Pages : 597

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Book Description
The Symposium on Frequency Standards and Metrology is an event held approximately every seven years, and is regarded as the premier conference in the field of advanced clocks and oscillators together with their applications in science and metrology. This series began with the first meeting at Universiteacute; Laval, Quebec Canada in 1971, and the last one was held in 2001 at the University of St. Andrews, Scotland. The 7th Symposium on Frequency Standards and Metrology is scheduled for October 5ndash;11, 2008 at the Asilomar Conference Grounds in Pacific Grove, California, USA. The Symposium is intended as a forum for bringing together international scientists and technologists engaged in the development of precise frequency standards and clocks, the study of their underlying physics, and their applications in metrology and tests of fundamental laws. The symposium has been traditionally held in a venue that promotes exchange of information on emerging ideas and latest achievements in the field, with a single-session approach which includes oral presentations by invitation, poster session(s) and keynote talks from internationally-recognized speakers. The program also includes social and other events aimed at promoting the exchange of technical and scientific information.

Author: Patrick Gill
Publisher: World Scientific
ISBN: 9814488860
Category : Science
Languages : en
Pages : 679

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Book Description
This book discusses the latest research ideas with application to frequency standards (e.g. optical clocks) and assesses ideas from previous symposia which have undergone critical analysis.

Author:
Publisher:
ISBN:
Category : Frequency response (Electrical engineering)
Languages : en
Pages : 744

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Book Description

Author: Ning Hu
Publisher:
ISBN:
Category : Cosmology
Languages : en
Pages : 930

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Book Description

Author: Terry J. Quinn
Publisher: IOS Press
ISBN: 9781586031671
Category : Science
Languages : en
Pages : 886

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Book Description
Over the last decade of the 20th century, many improvements took place in the field of metrology and fundamental constants. These developments and improvements are discussed in this book. The old caesium SI second definition has found a new realization with the fountain approach, replacing the classical thermal atomic beam. The use of cold atom techniques, slowed down and cooled, has opened a number of unexpected avenues for metrology and fundamental constants, one of these possibilities being the atom interferometry. Another development was the demonstration of the possiblility of performing a direct frequency division in the visible, using short femtosecond pulses. Many other developments are also discussed.

Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 1248

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Book Description

Author:
Publisher:
ISBN:
Category : Research, Industrial
Languages : en
Pages : 160

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Book Description