REALISATION D'UN ETALON DE FREQUENCE A 778 NM PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download REALISATION D'UN ETALON DE FREQUENCE A 778 NM PDF full book. Access full book title REALISATION D'UN ETALON DE FREQUENCE A 778 NM by BEATRICE.. DE BEAUVOIR. Download full books in PDF and EPUB format.
Author: BEATRICE.. DE BEAUVOIR
Publisher:
ISBN:
Category :
Languages : fr
Pages : 220
Get Book Here
Book Description
L'OBJET DE CETTE THESE EST LA CONSTRUCTION D'UN LASER ETALON A 778 NM POUR REALISER UNE MESURE ABSOLUE DES FREQUENCES 2S-8S/D DES ATOMES D'HYDROGENE ET DE DEUTERIUM. CET ETALON DE FREQUENCE EST UNE DIODE LASER STABILISEE EN FREQUENCE SUR UNE TRANSITION A DEUX PHOTONS 5S-5D DE L'ATOME DE RUBIDIUM. LES PERFORMANCES METROLOGIQUES DE CE LASER ETALON SONT 10 FOIS MEILLEURES QUE CELLES DU LASER HE-NE STABILISE SUR L'IODE. LA FREQUENCE DE CE LASER A ETE MESUREE AU COURS DE CETTE THESE GRACE A UNE CHAINE DE MULTIPLICATION DE FREQUENCE SITUEE A L'OBSERVATOIRE DE PARIS. L'ETUDE DES CARACTERISTIQUES METROLOGIQUES DE LA FIBRE OPTIQUE RELIANT NOS LABORATOIRES A MONTRE QUE LE PASSAGE DU FAISCEAU DU LASER ETALON DANS CELLE-CI NE DETERIORAIT PAS SES PROPRIETES METROLOGIQUES. LES TRANSITIONS 2S-8S/D SONT EXCITEES DANS UN JET ATOMIQUE PAR UN LASER TITANE-SAPHIR. PLUSIEURS EFFETS PARASITES DEPLACENT ET ELARGISSENT LES RAIES ETUDIEES. POUR S'AFFRANCHIR DE CES EFFETS, UNE FORME DE RAIE THEORIQUE EST AJUSTEE SUR LES SIGNAUX EXPERIMENTAUX. ELLE TIENT COMPTE EN PARTICULIER DE L'EFFET STARK LINEAIRE SUR LES NIVEAUX EXCITES. LA COMPARAISON EN FREQUENCE DU LASER D'EXCITATION ET DU LASER ETALON DONNE LA FREQUENCE ABSOLUE DE LA RAIE ETUDIEE. ON EN DEDUIT LA VALEUR DE LA CONSTANTE DE RYDBERG: R = 109737,3156849 (10)CM#-#1 CE RESULTAT, QUI EST LE PLUS PRECIS A CE JOUR, EST EN BON ACCORD AVEC CELUI OBTENU A MUNICH EN 1995 SUR LES TRANSITIONS 1S-2S ET 2S-4D. EN COMPARANT LES MESURES DU DEUTERIUM A CELLE DE L'HYDROGENE, ON DETERMINE LA VALEUR DU DEPLACEMENT DE LAMB DE L'ETAT 2S DU DEUTERIUM: L#2#S#-#2#P = 1059,228 (9)MHZ CETTE MESURE AMELIORE L'INCERTITUDE SUR CETTE VALEUR DE DEUX ORDRES DE GRANDEUR ; ELLE EST EN BON ACCORD AVEC LA DERNIERE MESURE DE CETTE QUANTITE. L'INCERTITUDE SUR CES RESULTATS APPROCHE CELLE DES CALCULS D'ELECTRODYNAMIQUE QUANTIQUE DONNANT LES VALEURS THEORIQUES DES NIVEAUX D'ENERGIE
Author: BEATRICE.. DE BEAUVOIR
Publisher:
ISBN:
Category :
Languages : fr
Pages : 220
Get Book Here
Book Description
L'OBJET DE CETTE THESE EST LA CONSTRUCTION D'UN LASER ETALON A 778 NM POUR REALISER UNE MESURE ABSOLUE DES FREQUENCES 2S-8S/D DES ATOMES D'HYDROGENE ET DE DEUTERIUM. CET ETALON DE FREQUENCE EST UNE DIODE LASER STABILISEE EN FREQUENCE SUR UNE TRANSITION A DEUX PHOTONS 5S-5D DE L'ATOME DE RUBIDIUM. LES PERFORMANCES METROLOGIQUES DE CE LASER ETALON SONT 10 FOIS MEILLEURES QUE CELLES DU LASER HE-NE STABILISE SUR L'IODE. LA FREQUENCE DE CE LASER A ETE MESUREE AU COURS DE CETTE THESE GRACE A UNE CHAINE DE MULTIPLICATION DE FREQUENCE SITUEE A L'OBSERVATOIRE DE PARIS. L'ETUDE DES CARACTERISTIQUES METROLOGIQUES DE LA FIBRE OPTIQUE RELIANT NOS LABORATOIRES A MONTRE QUE LE PASSAGE DU FAISCEAU DU LASER ETALON DANS CELLE-CI NE DETERIORAIT PAS SES PROPRIETES METROLOGIQUES. LES TRANSITIONS 2S-8S/D SONT EXCITEES DANS UN JET ATOMIQUE PAR UN LASER TITANE-SAPHIR. PLUSIEURS EFFETS PARASITES DEPLACENT ET ELARGISSENT LES RAIES ETUDIEES. POUR S'AFFRANCHIR DE CES EFFETS, UNE FORME DE RAIE THEORIQUE EST AJUSTEE SUR LES SIGNAUX EXPERIMENTAUX. ELLE TIENT COMPTE EN PARTICULIER DE L'EFFET STARK LINEAIRE SUR LES NIVEAUX EXCITES. LA COMPARAISON EN FREQUENCE DU LASER D'EXCITATION ET DU LASER ETALON DONNE LA FREQUENCE ABSOLUE DE LA RAIE ETUDIEE. ON EN DEDUIT LA VALEUR DE LA CONSTANTE DE RYDBERG: R = 109737,3156849 (10)CM#-#1 CE RESULTAT, QUI EST LE PLUS PRECIS A CE JOUR, EST EN BON ACCORD AVEC CELUI OBTENU A MUNICH EN 1995 SUR LES TRANSITIONS 1S-2S ET 2S-4D. EN COMPARANT LES MESURES DU DEUTERIUM A CELLE DE L'HYDROGENE, ON DETERMINE LA VALEUR DU DEPLACEMENT DE LAMB DE L'ETAT 2S DU DEUTERIUM: L#2#S#-#2#P = 1059,228 (9)MHZ CETTE MESURE AMELIORE L'INCERTITUDE SUR CETTE VALEUR DE DEUX ORDRES DE GRANDEUR ; ELLE EST EN BON ACCORD AVEC LA DERNIERE MESURE DE CETTE QUANTITE. L'INCERTITUDE SUR CES RESULTATS APPROCHE CELLE DES CALCULS D'ELECTRODYNAMIQUE QUANTIQUE DONNANT LES VALEURS THEORIQUES DES NIVEAUX D'ENERGIE
Author:
Publisher:
ISBN:
Category : Ağırlıklar ve ölçümler
Languages : en
Pages : 408
Get Book Here
Book Description
Author: Fritz Riehle
Publisher: John Wiley & Sons
ISBN: 3527605959
Category : Science
Languages : de
Pages : 540
Get Book Here
Book Description
Of all measurement units, frequency is the one that may be determined with the highest degree of accuracy. It equally allows precise measurements of other physical and technical quantities, whenever they can be measured in terms of frequency. This volume covers the central methods and techniques relevant for frequency standards developed in physics, electronics, quantum electronics, and statistics. After a review of the basic principles, the book looks at the realisation of commonly used components. It then continues with the description and characterisation of important frequency standards from atomic clocks, to frequency stabilised lasers. The whole is rounded of with a discussion of topical applications in engineering, telecommunications, and metrology.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 790
Get Book Here
Book Description
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Measurement
Languages : en
Pages : 546
Get Book Here
Book Description
Author: Ernst Bauer
Publisher: Springer
ISBN: 1493909355
Category : Technology & Engineering
Languages : en
Pages : 513
Get Book Here
Book Description
This book, written by a pioneer in surface physics and thin film research and the inventor of Low Energy Electron Microscopy (LEEM), Spin-Polarized Low Energy Electron Microscopy (SPLEEM) and Spectroscopic Photo Emission and Low Energy Electron Microscopy (SPELEEM), covers these and other techniques for the imaging of surfaces with low energy (slow) electrons. These techniques also include Photoemission Electron Microscopy (PEEM), X-ray Photoemission Electron Microscopy (XPEEM), and their combination with microdiffraction and microspectroscopy, all of which use cathode lenses and slow electrons. Of particular interest are the fundamentals and applications of LEEM, PEEM, and XPEEM because of their widespread use. Numerous illustrations illuminate the fundamental aspects of the electron optics, the experimental setup, and particularly the application results with these instruments. Surface Microscopy with Low Energy Electrons will give the reader a unified picture of the imaging, diffraction, and spectroscopy methods that are possible using low energy electron microscopes.
Author: R.J. Adrian
Publisher: Springer Science & Business Media
ISBN: 3662082632
Category : Science
Languages : en
Pages : 555
Get Book Here
Book Description
This volume includes revised and extended versions of selected papers presented at the Tenth International Symposium on Applications of Laser Techniques to Fluid Mechanics held at the Calouste Gulbenkian Foundation in Lisbon, during the period of July 10 to 13, 2000. The papers describe instrumentation developments for Velocity, Scalar and Multi-Phase Flows and results of measurements of Turbulent Flows, and Combustion and Engines. The papers demonstrate the continuing and healthy interest in the development of understanding of new methodologies and implementation in terms of new instrumentation. The prime objective of the Tenth Symposium was to provide a forum for the presentation of the most advanced research on laser techniques for flow measurements, and communicate significant results to fluid mechanics. The application of laser techniques to scientific and engineering fluid flow research was emphasized, but contributions to the theory and practice of laser methods were also considered where they facilitate new improved fluid mechanic research. Attention was placed on laser-Doppler anemometry, particle sizing and other methods for the measurement of velocity and scalars, such as particle image velocimetry and laser induced fluorescence.
Author: Deryle Lonsdale
Publisher: Routledge
ISBN: 1135973504
Category : Foreign Language Study
Languages : en
Pages : 974
Get Book Here
Book Description
A Frequency Dictionary of French is an invaluable tool for all learners of French, providing a list of the 5000 most frequently used words in the language. Based on a 23-million-word corpus of French which includes written and spoken material both from France and overseas, this dictionary provides the user with detailed information for each of the 5000 entries, including English equivalents, a sample sentence, its English translation, usage statistics, and an indication of register variation. Users can access the top 5000 words either through the main frequency listing or through an alphabetical index. Throughout the frequency listing there are thematically-organized lists of the top words from a variety of key topics such as sports, weather, clothing, and family terms. An engaging and highly useful resource, the Frequency Dictionary of French will enable students of all levels to get the most out of their study of French vocabulary. Former CD content is now available to access at www.routledge.com/9780415775311 as support material. Designed for use by corpus and computational linguists it provides the full text in a format that researchers can process and turn into suitable lists for their own research work. Deryle Lonsdale is Associate Professor in the Linguistics and English Language Department at Brigham Young University (Provo, Utah). Yvon Le Bras is Associate Professor of French and Department Chair of the French and Italian Department at Brigham Young University (Provo, Utah).
Author: Jan Gyllenbok
Publisher: Birkhäuser
ISBN: 3319575988
Category : Science
Languages : en
Pages : 691
Get Book Here
Book Description
This first of three volumes starts with a short introduction to historical metrology as a scientific discipline and goes on with an anthology of acient and modern measurement systems of all kind, scientific measures, units of time, weights, currencies etc. It concludes with an exhaustive list of references. Units of measurement are of vital importance in every civilization through history. Since the early ages, man has through necessity devised various measures to assist him in everyday life. They have enabled and continue to enable us to trade in commonly and equitably understood amounts, and to investigate, understand, and control the chemical, physical, and biological processes of the natural world. The essence of the work is an alphabetically ordered, comprehensive list of measurement nomenclature, units and scales. It provides an understanding of almost all quantitative expressions observed in all imaginable situations, including spelling variants and the abbreviations and symbols for units, and various acronyms used in metrology. It will be of use not only to historians of science and technology, but also to economic and social historians and should be in every major academic and national library as standard reference work on the topic.
Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 816
Get Book Here
Book Description
