Download or read book ETUDE EXPERIMENTALE DE LA REFRACTION X UV PAR UN PLASMA LASER written by FRANCOISE.. LUTRIN and published by . This book was released on 1996 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE ETUDIE, DEPUIS LA CONCEPTION JUSQU'A L'INTERPRETATION DES RESULTATS PHYSIQUES, UN NOUVEAU DIAGNOSTIC D'ETUDE DU GRADIENT DE DENSITE ELECTRONIQUE DANS LA ZONE DE TRANSPORT SURCRITIQUE D'UN PLASMA LASER (0,35 M). CE DIAGNOSTIC, DIT DE STRIOSCOPIE X-UV, EST FONDE SUR LA PROPRIETE DE REFRACTION D'UNE SONDE PAR UN GRADIENT D'INDICE. SA PARTICULARITE EST D'UTILISER L'EMISSION X-UV A 13 NM (92 EV) D'UN PLASMA LASER ANNEXE COMME SONDE X-UV. LA CONCEPTION ET LA CARACTERISATION DE CE DIAGNOSTIC FONT SIMULTANEMENT APPEL AUX PROPRIETES EMISSIVES ET REFRACTANTES DES PLASMAS LASER ET AUX PROPRIETES DE REFLEXION DES MULTICOUCHES. NOUS PRESENTONS DES IMAGES DE STRIOSCOPIE SPATIALEMENT ET SPECTRALEMENT RESOLUES D'UN PLASMA D'ALUMINIUM D'UN FLUX LASER DE 3.10#1#2 W/CM#2 SONDE AVEC UN RAYONNEMENT X-UV DE LONGUEUR D'ONDE 13 NM. LE DIAGNOSTIC DOIT ETRE TRES PRECISEMENT ALIGNE POUR OBTENIR UN BON CONTRASTE ET UNE BONNE RESOLUTION SPATIALE. NOUS METTONS ALORS EN EVIDENCE, POUR LA PREMIERE FOIS, LA REFRACTION D'UNE SONDE X-UV PAR UN PLASMA LASER. LES EXPERIENCES MONTRENT QU'ELLE EST PARTICULIEREMENT VISIBLE POUR LES COUPLES D'ENERGIES LASER SUR LE PLASMA SONDE ET LE PLASMA SONDE DE (150 ; 1 J) ET POUR LES COUPLES DE MATERIAUX (OR ; ALUMINIUM). LA REFRACTION OBSERVEE CORRESPOND SELON UN CODE DE SIMULATION DE L'HYDRODYNAMIQUE DU PLASMA, A UN GRADIENT DE DENSITE ELECTRONIQUE DE 6,5.10#2#5 ELECTRONS/CM#4 DANS LES 2 PREMIERS MICRONS DE LA ZONE SURCRITIQUE. POUR ETUDIER LES DEPENDANCES PARAMETRIQUES DU GRADIENT DE DENSITE ELECTRONIQUE DANS LA ZONE SURCRITIQUE, NOUS PROPOSONS PLUSIEURS AMELIORATIONS

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MODELISATION DE LA REFRACTION X UV A TRAVERS LA ZONE DE TRANSPORT D UN PLASMA CREE PAR LASER written by PHILIPPE.. NEY and published by . This book was released on 1995 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES PLASMAS DENSES TELS QUE LA ZONE DE TRANSPORT DES PLASMAS CREES PAR LASER ONT FAIT A CE JOUR L'OBJET D'UN NOMBRE LIMITE D'ETUDES. CELA S'EXPLIQUE PAR LE FAIT QUE DANS CES REGIONS LA MISE EN PLACE DE DIAGNOSTICS PAR SONDES OPTIQUES ANNEXES NECESSITE L'UTILISATION DE RAYONNEMENT DE COURTES LONGUEUR D'ONDE (40 - 400 A) ENCORE MAL MAITRISE. AU COURS DE CE TRAVAIL, NOUS AVONS MODELISE UN DIAGNOSTIC DE REFRACTROMETRIE X-UV CAPABLE DE CARACTERISER LES ZONES DENSES DES PLASMAS DE FUSION. POUR CELA, ON A CALCULE L'INDICE DE REFRACTION D'UN PLASMA DANS L'X-UV ET DEVELOPPE DES OUTILS NUMERIQUES ADAPTES AUX PROBLEMES. ON A AINSI MONTRE LA FAISABILITE D'UN TEL DIAGNOSTIC EN REALISANT DE VERITABLES EXPERIENCES NUMERIQUES. LES RESULTATS DE CES INVESTIGATIONS ONT PERMIS DE METTRE EN EVIDENCE LE ROLE JOUE PAR LES ELECTRONS LIES DU PLASMA SUR L'INDICE DE REFRACTION ET SUR LES IMAGES DE STRIOSCOPIE ET D'OMBROSCOPIE. LES STRUCTURES CARACTERISTIQUES QUI APPARAISSENT ALORS NOUS RENSEIGNENT EN PARTICULIER SUR L'HOMOGENEITE DU TRANSPORT DE L'ENERGIE DEPOSEE DANS LA COURONNE A TRAVERS LA FORME DES PROFILS RADIAUX DE DENSITE ET DE TEMPERATURE. DE CE FAIT, CE TYPE DE DIAGNOSTIC EST PARTICULIEREMENT BIEN ADAPTE A L'ETUDE DES INSTABILITES HYDRODYNAMIQUES (RAYLEIGH-TAYLOR) DANS LES PLASMAS DENSES

Download or read book ETUDE DES PROPRIETES OPTIQUES DES LASERS X UV APPLICATION A L INTERFEROMETRIE PAR BI MIROIR DE FRESNEL written by François Albert and published by . This book was released on 1998 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE PRESENTE LES RESULTATS SUR LES PROPRIETES OPTIQUES DES LASERS X-UV COLLISIONNELS A IONS NEONOIDES EMETTANT DANS LA REGION DE 20 NM. NOUS DECRIVONS LES CONDITIONS DE REALISATION D'UN LASER X-UV DANS UN PLASMA AMPLIFICATEUR, DENSE, CREE PAR L'IMPACT D'UNE IMPULSION INFRAROUGE SUR UNE CIBLE MASSIVE. CETTE DESCRIPTION EST DECLINEE EN FONCTION DES DEUX DUREES DE POMPAGE UTILISEES (600 PS - 130 PS). LE MILIEU AMPLIFICATEUR EST BRIEVEMENT DECRIT EN TERMES DE PHYSIQUE ATOMIQUE. SON INFLUENCE SUR LES PROPRIETES DE PROPAGATION DU RAYONNEMENT DANS LE PLASMA EST ABORDEE. ENFIN LE ROLE DE LA DEMI-CAVITE, ESSENTIELLE DANS LE CAS DU POMPAGE EN 600 PS, EST PRESENTE. NOUS ABORDONS PAR LA SUITE LES PROPRIETES OPTIQUES DE CE TYPE DE LASER PAR UN RAPPEL DES MESURES DEJA EFFECTUEES SUR LE NOMBRE DE PHOTONS, LA DIVERGENCE, L'ANGLE DE REFRACTION ET LA COHERENCE TEMPORELLE. CES RESULTATS SONT COMPLETES PAR UN DESCRIPTIF SUR LE COMPORTEMENT EN BILOBE DU FAISCEAU, EN DOUBLE PASSAGE, EN FONCTION DU REGLAGE DE LA DEMI-CAVITE. ENSUITE, UN RAPPEL SUR LES BASES DE LA THEORIE DE LA DIFFRACTION NOUS PERMET D'INTRODUIRE LA TECHNIQUE DE MESURE DE LA COHERENCE TRANSVERSE PAR DIFFRACTION. LES RESULTATS EXPERIMENTAUX METTENT EN EVIDENCE UNE VARIATION, DANS LA SECTION DU LASER X-UV, DE LA LARGEUR DE COHERENCE TOTALE MESUREE. CECI NOUS PERMET DE DETERMINER LA LARGEUR DE COHERENCE PROPRE QUE GENERE LE MILIEU AMPLIFICATEUR EN ENLEVANT LA CONTRIBUTION DE LA COHERENCE DE PROPAGATION. A TITRE COMPARATIF NOUS PRESENTONS DES RESULTATS PRELIMINAIRES DE MESURE DE LA LARGEUR DE COHERENCE DU LASER A FER NEONOIDE A 25,5 NM POMPE PAR IMPULSION DE 130 PS. NOUS VOYONS ENFIN LA MISE EN UVRE D'EXPERIENCES D'INTERFEROMETRIE PAR DIVISION DE FRONT D'ONDE A L'AIDE D'UN BI-MIROIR DE FRESNEL OU NOUS EXPLOITONS LA COHERENCE DE PROPAGATION. UNE PREMIERE EXPERIENCE MONTRE QU'UNE RESOLUTION DE /20 PEUT ETRE AISEMENT ATTEINTE. L'APPLICATION DE CETTE TECHNIQUE A LA MESURE DE LA DEFORMATION D'UNE SURFACE DE NIOBUM SOUMISE A UN CHAMP ELECTRIQUE INTENSE ( 50 MV/M) PERMET DE METTRE EN EVIDENCE DES CHANGEMENTS NANOMETRIQUES DE FORME DE LA SURFACE.

Download or read book Atoms Solids and Plasmas in Super Intense Laser Fields written by Dimitri Batani and published by Springer Science & Business Media. This book was released on 2001-09-30 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 30th Course of the International School of Quantum Electronics on Atoms, Solids and Plasmas in Super-Intense Laser Fields, held 8-14 July, in Erice, Sicily

Download or read book ETUDE EXPERIMENTALE ET SIMULATIONS NUMERIQUES DE L EFFET DE LA REFRACTION DANS UN PLASMA DE LASER X EN EXCITATION COLLISIONNELLE written by ANDRE.. DULIEU and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LES ETUDES SUR LE LASER X FONT APPARAITRE AUJOURD'HUI UN CHANGEMENT IMPORTANT DANS LES THEMES DE RECHERCHE. LE LASER X N'EST PLUS CONSIDERE COMME UN SUJET DE RECHERCHE MAIS COMME UN OUTIL FUTUR. DANS CE BUT, ON CHERCHE ENTRE AUTRE A AMELIORER LA QUALITE OPTIQUE DU FAISCEAU LASER PRODUIT. L'UN DES POINTS LES PLUS GENANTS EST LA REFRACTION. DANS LA THESE, GRACE A UNE ETUDE APPROFONDIE DU LASER X DANS L'ARGENT, LES EFFETS TRES IMPORTANTS DE LA REFRACTION SONT MIS EN EVIDENCE ET SIMULES. LE CODE DE SIMULATION NUMERIQUE DE LA REFRACTION A ENSUITE ETE APPLIQUE A DIVERSES GEOMETRIES CARACTERISTIQUES DE CIBLES LASER X, METTANT EN EVIDENCE L'IMPORTANCE DES EFFETS DE LA REFRACTION ET LES MOYENS DE LES DOMINER

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993-03 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Current Programs written by and published by . This book was released on 1976 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physics Briefs written by and published by . This book was released on 1979 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to Plasma Physics and Controlled Fusion written by Francis F. Chen and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: TO THE SECOND EDITION In the nine years since this book was first written, rapid progress has been made scientifically in nuclear fusion, space physics, and nonlinear plasma theory. At the same time, the energy shortage on the one hand and the exploration of Jupiter and Saturn on the other have increased the national awareness of the important applications of plasma physics to energy production and to the understanding of our space environment. In magnetic confinement fusion, this period has seen the attainment 13 of a Lawson number nTE of 2 x 10 cm -3 sec in the Alcator tokamaks at MIT; neutral-beam heating of the PL T tokamak at Princeton to KTi = 6. 5 keV; increase of average ß to 3%-5% in tokamaks at Oak Ridge and General Atomic; and the stabilization of mirror-confined plasmas at Livermore, together with injection of ion current to near field-reversal conditions in the 2XIIß device. Invention of the tandem mirror has given magnetic confinement a new and exciting dimension. New ideas have emerged, such as the compact torus, surface-field devices, and the EßT mirror-torus hybrid, and some old ideas, such as the stellarator and the reversed-field pinch, have been revived. Radiofrequency heat ing has become a new star with its promise of dc current drive. Perhaps most importantly, great progress has been made in the understanding of the MHD behavior of toroidal plasmas: tearing modes, magnetic Vll Vlll islands, and disruptions.

Download or read book Laser Plasmas and Nuclear Energy written by Heinrich Hora and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.

Download or read book The Glossary of Prosthodontic Terms written by and published by . This book was released on 1994 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Oxidation Processes for Water and Wastewater Treatment written by Simon Parsons and published by IWA Publishing. This book was released on 2004-03-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The suitability of Advanced Oxidation Processes (AOPs) for pollutant degradation was recognised in the early 1970s and much research and development work has been undertaken to commercialise some of these processes. AOPs have shown great potential in treating pollutants at both low and high concentrations and have found applications as diverse as ground water treatment, municipal wastewater sludge destruction and VOCs control. Advanced Oxidation Processes for Water and Wastewater Treatment is an overview of the advanced oxidation processes currently used or proposed for the remediation of water, wastewater, odours and sludge. The book contains two opening chapters which present introductions to advanced oxidation processes and a background to UV photolysis, seven chapters focusing on individual advanced oxidation processes and, finally, three chapters concentrating on selected applications of advanced oxidation processes. Advanced Oxidation Processes for Water and Wastewater Treatment will be invaluable to readers interested in water and wastewater treatment processes, including professionals and suppliers, as well as students and academics studying in this area. Dr Simon Parsons is a Senior Lecturer in Water Sciences at Cranfield University with ten years' experience of industrial and academic research and development.

Download or read book Analogue Gravity Phenomenology written by Daniele Faccio and published by Springer. This book was released on 2013-08-13 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analogue Gravity Phenomenology is a collection of contributions that cover a vast range of areas in physics, ranging from surface wave propagation in fluids to nonlinear optics. The underlying common aspect of all these topics, and hence the main focus and perspective from which they are explained here, is the attempt to develop analogue models for gravitational systems. The original and main motivation of the field is the verification and study of Hawking radiation from a horizon: the enabling feature is the possibility to generate horizons in the laboratory with a wide range of physical systems that involve a flow of one kind or another. The years around 2010 and onwards witnessed a sudden surge of experimental activity in this expanding field of research. However, building an expertise in analogue gravity requires the researcher to be equipped with a rather broad range of knowledge and interests. The aim of this book is to bring the reader up to date with the latest developments and provide the basic background required in order to appreciate the goals, difficulties, and success stories in the field of analogue gravity. Each chapter of the book treats a different topic explained in detail by the major experts for each specific discipline. The first chapters give an overview of black hole spacetimes and Hawking radiation before moving on to describe the large variety of analogue spacetimes that have been proposed and are currently under investigation. This introductory part is then followed by an in-depth description of what are currently the three most promising analogue spacetime settings, namely surface waves in flowing fluids, acoustic oscillations in Bose-Einstein condensates and electromagnetic waves in nonlinear optics. Both theory and experimental endeavours are explained in detail. The final chapters refer to other aspects of analogue gravity beyond the study of Hawking radiation, such as Lorentz invariance violations and Brownian motion in curved spacetimes, before concluding with a return to the origins of the field and a description of the available observational evidence for horizons in astrophysical black holes.

Download or read book Advanced Techniques for Surface Engineering written by W. Gissler and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's shortages of resources make the search for wear and corrosion resistant materials one of the most important tasks of the next century. Since the surface of a material is the location where any interaction occurs, it is that there the hardest requirements on the material are imposed: to be wear resistant for tools and bearings; to be corrosion resistant for turbine blades and tubes in the petrochemical industry; to be antireflecting for solar cells; to be decorative for architectural panels and to combine several of these properties in other applications. Surface engineering is the general term that incorporates all the techniques by which a surface modification can be accomplished. These techniques include both coating and modification of the surface by ion implantation and laser beam melting. In recent years a continuously growing number of these techniques were developed to the extent that it became more and more difficult to maintain an overlook and to understand which of these highly differentiated techniques might be applied to resolve a given surface engineering problem. A similar development is also occuring for surface characterization techniques. This volume contains contributions from renowned scientists and engineers to the Eurocourse the aim of which was to inform about the various techniques and to give a comprehensive survey of the latest development on this subject.

Download or read book Pandex Current Index to Scientific and Technical Literature written by and published by . This book was released on 1970 with total page 1404 pages. Available in PDF, EPUB and Kindle. Book excerpt: