Caractérisation spectrale et temporelle de l'émission X issue de l'interaction laser - agrégats

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ISBN 13 :
Total Pages : 215 pages
Book Rating : 4.:/5 (494 download)

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Book Synopsis Caractérisation spectrale et temporelle de l'émission X issue de l'interaction laser - agrégats by : Christophe Bonté

Download or read book Caractérisation spectrale et temporelle de l'émission X issue de l'interaction laser - agrégats written by Christophe Bonté and published by . This book was released on 2006 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les agrégats de gaz rare constituent un état de la matière intermédiaire entre les cibles solides et les atomes en phase gazeuse. Il a été démontré que les agrégats irradiés sont sources d'ions, d'électrons, de neutrons énergétiques ainsi que de rayonnement allant du visible aux X durs. Cette source peut-être produite avec un taux de répétition élevé et a l'avantage de ne pas produire de débris, et de présenter une trés forte conversion de l'énergie laser incidente. Nous nous intéressons au rayonnement X particulièrement, en le caractérisant en intensité, spectre et durée, comme préalable à toute application. En collaboration avec l'INRS-Energie (Varenne, Canada), nous avons mis en oeuvre une caméra à balayage de fente dont la ésolution temporelle est de 800 fs rms. En focalisantdes impulsions laser courtes (30 fs - 5 ps) et intenses sur des agrégats d'argon (15-30 nm), nous avons démontré que l'émission X dont l'énergie estsupérieure à 2 keV est plus courte que la résolution temporelle. En couplant la caméra à un cristal tronconique, nous nous sommes intéressés au rayonnement de couche K dans la gamme 2,9 - 3,2 keV. Nous avons démontré que ce rayonnement a une durée inférieure à la résolution temporelle, et que les raies étaient émises avec un écart temporel relatif inférieur à 1 ps. Une simulation basée sur un modèle nano-plasma et sur un code collisionnel-radiatif a été développée au CELIA. Les spectres X résolus en temps calculés reproduisent à la fois la briéveté d'émission du rayonnement X et les états de charge élevés observés.

Etude expérimentale de l'émission X issue de l'interaction laser-agrégats

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ISBN 13 :
Total Pages : 205 pages
Book Rating : 4.:/5 (493 download)

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Book Synopsis Etude expérimentale de l'émission X issue de l'interaction laser-agrégats by : Tony Caillaud

Download or read book Etude expérimentale de l'émission X issue de l'interaction laser-agrégats written by Tony Caillaud and published by . This book was released on 2004 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail de thèse a consisté en l'étude et l'optimisation d'une source ultra-brève de rayonnement X dans la gamme multi-keV, issue de l'interaction d'un laser intense avec un jet d'agrégats d'Argon. Nous avons porté un intérêt tout particulier sur la caractérisation du jet d'agrégats d'Argon employé lors des expériences (densité totale, densité et taille moyenne des agrégats). L'étude de la propagation de l'impulsion laser dans le jet dense d'agrégats a révélé l'existence d'un effet lié à la réfraction dans le jet. L'absorption, le chauffage et les spectres d'émission X ont été étudiés en fonction des paramètres du laser femtoseconde (durée et énergie de l'impulsion laser, contraste temporel) et de la taille des agrégats (20 à 35 nm), dans le but d'optimiser la source de rayonnement X,. L'absorption et l'émission X présentent un optimum avec la durée laser consistant avec un modèle existant. Le contraste s'est avéré un paramètre crucial pour la production de rayonnement X. Un rendement énergétique très intéressant a été obtenu : 12 nJ de rayonnement X émis autour de 3 keV, pour 3 mJ d'énergie laser incidente. L'analyse de l'énergie moyenne déposée par agrégat est associée à une modélisation simple de l'expansion hydrodynamique de l'agrégat. Un code de physique atomique est utilisé pour tenter de reconstruire les spectres et pour analyser l'aspect temporel de la source X. La comparaison de ces calculs avec une expérience préliminaire montre une durée ultra-brève de l'émission X (~ps).

Journal de physique

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Publisher :
ISBN 13 :
Total Pages : 760 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Journal de physique by :

Download or read book Journal de physique written by and published by . This book was released on 2006 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:

L'émission X

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Publisher :
ISBN 13 :
Total Pages : 365 pages
Book Rating : 4.:/5 (491 download)

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Book Synopsis L'émission X by : Christophe Prigent

Download or read book L'émission X written by Christophe Prigent and published by . This book was released on 2004 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Atoms

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Publisher : Franklin Classics
ISBN 13 :
Total Pages : 242 pages
Book Rating : 4.:/5 (2 download)

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Book Synopsis Atoms by : Jean Perrin

Download or read book Atoms written by Jean Perrin and published by Franklin Classics. This book was released on 1916 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Cinematic Body

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Publisher : U of Minnesota Press
ISBN 13 : 9781452902494
Total Pages : 300 pages
Book Rating : 4.9/5 (24 download)

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Book Synopsis The Cinematic Body by : Steven Shaviro

Download or read book The Cinematic Body written by Steven Shaviro and published by U of Minnesota Press. This book was released on 1994 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: A radical approach to film viewing

Organic Solid-State Lasers

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Publisher : Springer
ISBN 13 : 3642367054
Total Pages : 179 pages
Book Rating : 4.6/5 (423 download)

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Book Synopsis Organic Solid-State Lasers by : Sébastien Forget

Download or read book Organic Solid-State Lasers written by Sébastien Forget and published by Springer. This book was released on 2013-07-03 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.

Routledge International Handbook of Ignorance Studies

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Publisher : Routledge
ISBN 13 : 1317964675
Total Pages : 427 pages
Book Rating : 4.3/5 (179 download)

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Book Synopsis Routledge International Handbook of Ignorance Studies by : Matthias Gross

Download or read book Routledge International Handbook of Ignorance Studies written by Matthias Gross and published by Routledge. This book was released on 2015-05-15 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Once treated as the absence of knowledge, ignorance today has become a highly influential topic in its own right, commanding growing attention across the natural and social sciences where a wide range of scholars have begun to explore the social life and political issues involved in the distribution and strategic use of not knowing. The field is growing fast and this handbook reflects this interdisciplinary field of study by drawing contributions from economics, sociology, history, philosophy, cultural studies, anthropology, feminist studies, and related fields in order to serve as a seminal guide to the political, legal and social uses of ignorance in social and political life. Chapter 33 of this book is freely available as a downloadable Open Access PDF under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license available here: https://tandfbis.s3-us-west-2.amazonaws.com/rt-files/docs/Open+Access+Chapters/9780415718967_oachapter33.pdf

Flexoelectricity in Liquid Crystals

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Publisher : World Scientific
ISBN 13 : 1848167997
Total Pages : 299 pages
Book Rating : 4.8/5 (481 download)

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Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka

Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.

Laser: 50 Years Of Discoveries

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Publisher : World Scientific
ISBN 13 : 9814612421
Total Pages : 185 pages
Book Rating : 4.8/5 (146 download)

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Book Synopsis Laser: 50 Years Of Discoveries by : Fabien Bretenaker

Download or read book Laser: 50 Years Of Discoveries written by Fabien Bretenaker and published by World Scientific. This book was released on 2014-10-27 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book provides an overview of the principle and applications of lasers enriched with numerous illustrations.Being over fifty years old, lasers continue to amaze us. Their performance characteristics are constantly reaching new limits, and the scope of their applications continues to expand. Yet, it took years of effort by teams of physicists to transform the fundamental notions of Einstein into the first experimental beam of laser light. And history is still going on as fundamental research is now triggered by its remarkable properties.This book addresses every aspects of laser light, from its fundamental principles to its industrial applications, at a level particularly suited for high school teachers, students, and anybody curious about science and technology.

Xenakis

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Publisher : Routledge
ISBN 13 : 1135874948
Total Pages : 306 pages
Book Rating : 4.1/5 (358 download)

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Book Synopsis Xenakis by : James Harley

Download or read book Xenakis written by James Harley and published by Routledge. This book was released on 2004-08-02 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Xenakis: His Life in Music is a full-length study of the influential contemporary composer Iannis Xenakis. Following the trajectory of Xenakis’s compositional development, James Harley, who studied with Xenakis, presents the works together with clear explanations of the technical and conceptual innovations that shaped them. Harley examines the relationship between the composer and two early influences: Messiaen and Le Corbusier. Particular attention is paid to analyzing works which were vital to the composer’s creative development, from early, unpublished works to the breakthrough pieces Metastasis and Pithoprakta, through the oft-discussed decade of formalization and the evolving styles of the succeeding three decades.

Nonlinear Optical Materials

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Publisher : Springer Science & Business Media
ISBN 13 : 9780387985817
Total Pages : 270 pages
Book Rating : 4.9/5 (858 download)

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Book Synopsis Nonlinear Optical Materials by : Jerome V. Moloney

Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.

Clinical Chronopharmacology

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Publisher : CRC Press
ISBN 13 :
Total Pages : 268 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Clinical Chronopharmacology by : Alain Reinberg

Download or read book Clinical Chronopharmacology written by Alain Reinberg and published by CRC Press. This book was released on 1990-07 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periodical and predictable changes in biological susceptibility and response to a large variety of chemical agents, including drugs and food, have been documented since the early 1970s. This book provides a survey of clinically-documented research in chronopharmacology.

Minimum competence in scientific English

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Publisher : L'Editeur : EDP Sciences
ISBN 13 : 9782868835888
Total Pages : 264 pages
Book Rating : 4.8/5 (358 download)

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Book Synopsis Minimum competence in scientific English by : Sue Blattes

Download or read book Minimum competence in scientific English written by Sue Blattes and published by L'Editeur : EDP Sciences. This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage, devenu célèbre sous son sigle MCSE, a déjà été utilisé par plus de 50 000 étudiants, chercheurs, professionnels. L'objectif est de lire et écrire des textes en anglais scientifique avec facilité et pertinence. L'ouvrage est conçu pour que l'apprenant devienne un véritable utilisateur de l'anglais. La méthode originale repose sur l'analyse des fonctions et structures nécessaires : measurement, frequency, comparison, modification, link words, time, cause and consequence, hypothesis, modality, purpose and process, impersonal forms, compound nouns and adjectives. Dans chaque unit, des tests d'auto-évaluation permettent de se situer et de construire son parcours de formation, d'abord en définissant ses objectifs à l'aide des key points et du lexis, puis, de façon plus personnalisée, en puisant dans les examples in context, checkpoints (back to basics, word web), web search, FAQs... MCSE est l'outil de base d'une méthode qui comprend aussi d'autres outils dans la même collection (Listening Comprehension for Scientiflc English et Speaking Skills in Scientitic English). L'ouvrage est destiné à tout apprenant de niveau baccalauréat qui désire acquérir une réelle compétence dans l'écriture et la lecture de textes en anglais scientifique.

Scientific Canadian Mechanics' Magazine and Patent Office Record

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Publisher :
ISBN 13 :
Total Pages : 1070 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Scientific Canadian Mechanics' Magazine and Patent Office Record by : Canada. Patent Office

Download or read book Scientific Canadian Mechanics' Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Biological Rhythm Research

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Publisher :
ISBN 13 :
Total Pages : 472 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Biological Rhythm Research by : A. Sollberger

Download or read book Biological Rhythm Research written by A. Sollberger and published by . This book was released on 1965 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Ladybird Illustrated

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Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.5/5 (61 download)

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Book Synopsis The Ladybird Illustrated by : D H Lawrence

Download or read book The Ladybird Illustrated written by D H Lawrence and published by . This book was released on 2020-11-09 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Ladybird is a long tale or novella by D. H. Lawrence. It was first drafted in 1915 as a short story entitled The Thimble. Lawrence rewrote and extended it under a new title in December 1921 and sent the final version to his English agent on 9 January 1922. It was collected with two other tales, The Captain's Doll and The Fox, and the three novellas were then published in London by Martin Secker in March 1923 under the title The Ladybird and in New York by Thomas Seltzer as The Captain's Doll in April 1923."