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Cavites Optiques De Haute Finesse Pour La Mesure De Composes A Letat De Trace En Phase Gazeuse
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Book Synopsis Cavités optiques de haute finesse pour la mesure de composés à l'état de trace en phase gazeuse by : Meriam Triki
Download or read book Cavités optiques de haute finesse pour la mesure de composés à l'état de trace en phase gazeuse written by Meriam Triki and published by . This book was released on 2008 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le thème central de ce travail de thèse est consacré à la mesure de concentrations de gaz à l'état de traces par spectroscopie d'absorption à haute sensibilité dans le domaine de l'infrarouge et du visible. Différentes sources spectrales sont employées, des lasers à émission verticale en cavité externe (VECSELs), des diodes laser à cavité externe (ECDLs) et des diodes électroluminescentes à émission large bande (LEDs). Deux techniques sont abordées : la OF-CEAS (Optical-Feedback Cavity, Enhanced Absorption Spectroscopy) et la IBB-CEAS (Incoherent Broadband-Cavity Enhanced Absorption Spectroscopy). D'abord, les notions nécessaires à la compréhension des techniques considérées sont présentées. Suit la description du développement d'un système IBB-CEAS avec une source LED émettant autour de 643 nm, avec application à la détection des oxydes d'azote à l'état de traces. Les résultats obtenus mettent en avant les avantages de cette technique en termes de simplicité, robustesse et de compacité. La limite de détection obtenue pour le radical NO2 est estimée à 1 ppbv pour deux minutes de temps d'acquisition. Pour la deuxième étude concernant une source laser de type VECSEL émettant à 2.3 μm et pompé optiquement, le résultat principal a été l'obtention d'un balayage monofréquence sur une grande plage spectrale de l'ordre de 16.5 cm-1. Cela a demandé un balayage simultané de la température et de la longueur de la cavité laser. Ensuite, des essais préliminaires on été effectués pour coupler cette source avec la technique OF-CEAS. Ces essais ont révélé un problème de stabilité du comportement monofréquence de la source VECSEL en présence de rétroaction optique. Enfin, la faisabilité de la technique OF-CEAS avec une source ECDL émettant dans l'infrarouge proche pour le diagnostic des décharges à basse pression a été démontrée. Le coefficient d'absorption minimale obtenu est de l'ordre de 10-9 cm-1 pour un temps d'acquisition court (0.1 s), valeur typique atteinte auparavant dans divers systèmes OF-CEAS. Des essais ont été réalisés avec une décharge en flux d'argon avec des traces de méthane autour de 1 mbar. Le même niveau de bruit a été observé que sans décharge. Cependant, dans la gamme spectrale accessible avec le ECDL disponible, les radicaux de type CHX produits dans ce type de décharge n'ont pas été détectés.
Book Synopsis Cavités optiques de haute finesse pour la mesure de composés à l'état de trace en phase gazeuse by : Meriam Triki
Download or read book Cavités optiques de haute finesse pour la mesure de composés à l'état de trace en phase gazeuse written by Meriam Triki and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applied Reactor Physics by : Alain Hébert
Download or read book Applied Reactor Physics written by Alain Hébert and published by Presses inter Polytechnique. This book was released on 2009 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9789251055212 Total Pages :116 pages Book Rating :4.0/5 (552 download)
Book Synopsis Guidelines for Soil Description by : Food and Agriculture Organization of the United Nations
Download or read book Guidelines for Soil Description written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2006 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soils are affected by human activities, such as industrial, municipal and agriculture, that often result in soil degradation and loss. In order to prevent soil degradation and to rehabilitate the potentials of degraded soils, reliable soil data are the most important prerequisites for the design of appropriate land-use systems and soil management practices as well as for a better understanding of the environment. The availability of reliable information on soil morphology and other characteristics obtained through examination and description of the soil in the field is essential, and the use of a common language is of prime importance. These guidelines, based on the latest internationally accepted systems and classifications, provide a complete procedure for soil description and for collecting field data. To help beginners, some explanatory notes are included as well as keys based on simple test and observations.--Publisher's description.
Book Synopsis A Phonetic Dictionary of the English Language by : Hermann Michaelis
Download or read book A Phonetic Dictionary of the English Language written by Hermann Michaelis and published by . This book was released on 1913 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Ecology written by Unesco and published by . This book was released on 1955 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :International Atomic Energy Agency Publisher :International Atomic Energy Agency ISBN 13 :9789201063205 Total Pages :72 pages Book Rating :4.0/5 (632 download)
Book Synopsis In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 by : International Atomic Energy Agency
Download or read book In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.
Book Synopsis Transport Theory by : James J. Duderstadt
Download or read book Transport Theory written by James J. Duderstadt and published by John Wiley & Sons. This book was released on 1979 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Problems after each chapter
Book Synopsis Nuclear Computational Science by : Yousry Azmy
Download or read book Nuclear Computational Science written by Yousry Azmy and published by Springer Science & Business Media. This book was released on 2010-04-15 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear engineering has undergone extensive progress over the years. In the past century, colossal developments have been made and with specific reference to the mathematical theory and computational science underlying this discipline, advances in areas such as high-order discretization methods, Krylov Methods and Iteration Acceleration have steadily grown. Nuclear Computational Science: A Century in Review addresses these topics and many more; topics which hold special ties to the first half of the century, and topics focused around the unique combination of nuclear engineering, computational science and mathematical theory. Comprising eight chapters, Nuclear Computational Science: A Century in Review incorporates a number of carefully selected issues representing a variety of problems, providing the reader with a wealth of information in both a clear and concise manner. The comprehensive nature of the coverage and the stature of the contributing authors combine to make this a unique landmark publication. Targeting the medium to advanced level academic, this book will appeal to researchers and students with an interest in the progression of mathematical theory and its application to nuclear computational science.
Book Synopsis The Physics of Nuclear Reactors by : Serge Marguet
Download or read book The Physics of Nuclear Reactors written by Serge Marguet and published by Springer. This book was released on 2018-02-26 with total page 1462 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive volume offers readers a progressive and highly detailed introduction to the complex behavior of neutrons in general, and in the context of nuclear power generation. A compendium and handbook for nuclear engineers, a source of teaching material for academic lecturers as well as a graduate text for advanced students and other non-experts wishing to enter this field, it is based on the author’s teaching and research experience and his recognized expertise in nuclear safety. After recapping a number of points in nuclear physics, placing the theoretical notions in their historical context, the book successively reveals the latest quantitative theories concerning: • The slowing-down of neutrons in matter • The charged particles and electromagnetic rays • The calculation scheme, especially the simplification hypothesis • The concept of criticality based on chain reactions • The theory of homogeneous and heterogeneous reactors • The problem of self-shielding • The theory of the nuclear reflector, a subject largely ignored in literature • The computational methods in transport and diffusion theories Complemented by more than 400 bibliographical references, some of which are commented and annotated, and augmented by an appendix on the history of reactor physics at EDF (Electricité De France), this book is the most comprehensive and up-to-date introduction to and reference resource in neutronics and reactor theory.
Author :John Henry Lorentz Publisher :Historical Dictionaries of Asia, Oceania, and the Middle East ISBN 13 : Total Pages :570 pages Book Rating :4.F/5 ( download)
Book Synopsis Historical Dictionary of Iran by : John Henry Lorentz
Download or read book Historical Dictionary of Iran written by John Henry Lorentz and published by Historical Dictionaries of Asia, Oceania, and the Middle East. This book was released on 2007 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Book Synopsis Philostratus by : Philostratus (the Athenian)
Download or read book Philostratus written by Philostratus (the Athenian) and published by . This book was released on 1912 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Problems of the Arid Zone by : Unesco
Download or read book The Problems of the Arid Zone written by Unesco and published by paris. This book was released on 1962 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Climatology written by Unesco and published by . This book was released on 1958 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Mechanisms of Hormone Action by : Gesellschaft für Biologische Chemie. Colloquium
Download or read book Molecular Mechanisms of Hormone Action written by Gesellschaft für Biologische Chemie. Colloquium and published by . This book was released on 1989 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Object and Economy in Medieval Winchester by : Martin Biddle
Download or read book Object and Economy in Medieval Winchester written by Martin Biddle and published by . This book was released on 1990 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: The six thousand objects recorded in these two volumes offer an unparalleled view of the Middle Ages. Ranging from the first products of the Anglo-Saxon goldsmith's skill to the iron tenter-hooks of the cloth industry, the objects provide invaluable data for the study of social, artistic, economic, and industrial life in Medieval Winchester. Richly illustrated throughout and including thirty two pages of full-color plates, this comprehensive collection will be an valuable tool to medievalists and anyone with an interest in the Middle Ages.
Download or read book Reactor Dosimetry written by Harry Farrar and published by ASTM International. This book was released on 1994 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 8th ASTM-Euratom Symposium, held in Vail, Colorado, Aug.-Sept. 1993, to provide a forum for experts to discuss their latest results under the broad theme of dosimetry for the correlation of radiation effects. Preceded by a summary of the keynote presentations and followed by summa
