ETUDE THEORIQUE DE PHENOMENES NON LINEAIRES DANS L'INTERACTION LASER PLASMA A TRES HAUT FLUX PDF Download

Author: Alain Bourdier
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Category :
Languages : fr
Pages : 301

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CALCULS DE PERTURBATION DANS LA THEORIE DES OSCILLATIONS NON LINEAIRES. NOTION D'INSTABILITE PARAMETRIQUE. PROPAGATION D'UNE ONDE DANS UN PLASMA FROID AVEC "EFFETS RELATIVISTES". INSTABILITES PARAMETRIQUES DUES A DES CONECTIONS RELATIVISTES

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Category : Aeronautics
Languages : en
Pages : 1208

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Author: BRICE.. QUESNEL
Publisher:
ISBN:
Category :
Languages : fr
Pages : 242

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CETTE THESE CONSTITUE UNE ETUDE THEORIQUE ET NUMERIQUE DU COMPORTEMENT EN REGIME RELATIVISTE DE DEUX PHENOMENES NON-LINEAIRES DE LA PHYSIQUE DE L'INTERACTION LASER-PLASMA : LES INSTABILITES PARAMETRIQUES ELECTRONIQUES ET LA FORCE PONDEROMOTRICE. DANS LA PREMIERE PARTIE DE CE MEMOIRE, LA RELATION DE DISPERSION A TROIS DIMENSIONS DES INSTABILITES PARAMETRIQUES ELECTRONIQUES EST ETABLIE POUR UNE ONDE POLARISEE CIRCULAIREMENT SE PROPAGEANT DANS UN PLASMA HOMOGENE ET FROID, SANS LIMITATIONS SUR L'INTENSITE DE L'ONDE NI SUR LA DENSITE DU PLASMA. ELLE EST OBTENUE SOUS FORME D'UN DETERMINANT INFINI ET RESOLUE NUMERIQUEMENT APRES TRONCATURE. LE COMPORTEMENT DES DIFFERENTES INSTABILITES PARAMETRIQUES ELECTRONIQUES EST PRECISE A HAUTE DENSITE ET HAUTE INTENSITE. LES RESULTATS OBTENUS SONT VERIFIES A L'AIDE DE SIMULATIONS NUMERIQUES A DEUX DIMENSIONS, QUI MONTRENT EGALEMENT QUE DANS LEUR PHASE NON-LINEAIRE, CES INSTABILITES PROVOQUENT A HAUTE DENSITE UN VIOLENT CHAUFFAGE DU PLASMA AINSI QUE LA FILAMENTATION ET UNE FORTE ABSORPTION DE L'ONDE. L'INSTABILITE DE WEIBEL EST EGALEMENT BRIEVEMENT ETUDIEE EN REGIME RELATIVISTE. DANS LA DEUXIEME PARTIE DE CE TRAVAIL, NOUS ETABLISSONS UNE EXPRESSION DE LA FORCE PONDEROMOTRICE EXERCEE PAR UNE IMPULSION LASER ULTRA-INTENSE DANS LE VIDE AU VOISINAGE DU FOYER. LA CONDITION DE VALIDITE DE CE CALCUL EST PRECISEE. DANS LE CAS D'UNE IMPULSION DE PROFIL TRANSVERSE GAUSSIEN, PLUSIEURS EXPRESSIONS DU CHAMP ELECTROMAGNETIQUE AU FOYER SONT ETABLIES, QUI CORRESPONDENT A DIFFERENTS DEGRES D'APPROXIMATION. UN CODE NUMERIQUE D'INTEGRATION DES EQUATIONS DU MOUVEMENT D'UN ELECTRON DANS LE CHAMP LASER EST UTILISE AVEC CES DIFFERENTES EXPRESSIONS. IL CONFIRME LA CONDITION DE VALIDITE ET L'EXPRESSION DE LA FORCE PONDEROMOTRICE RELATIVISTE OBTENUES. IL MONTRE L'IMPORTANCE D'UNE DESCRIPTION PRECISE DU CHAMP AU FOYER. CES RESULTATS SONT UTILISES POUR INTERPRETER UNE EXPERIENCE RECENTE ET POUR CRITIQUER D'AUTRES TRAVAUX THEORIQUES DANS CE DOMAINE.

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Category : Nuclear energy
Languages : en
Pages : 1330

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Author: Luc Tartar
Publisher: Springer Science & Business Media
ISBN: 3642051952
Category : Science
Languages : en
Pages : 466

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Homogenization is not about periodicity, or Gamma-convergence, but about understanding which effective equations to use at macroscopic level, knowing which partial differential equations govern mesoscopic levels, without using probabilities (which destroy physical reality); instead, one uses various topologies of weak type, the G-convergence of Sergio Spagnolo, the H-convergence of François Murat and the author, and some responsible for the appearance of nonlocal effects, which many theories in continuum mechanics or physics guessed wrongly. For a better understanding of 20th century science, new mathematical tools must be introduced, like the author’s H-measures, variants by Patrick Gérard, and others yet to be discovered.

Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659

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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.

Author: Edward A. Metzbower
Publisher: ASM International(OH)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 286

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Author: Sir John Townsend
Publisher:
ISBN:
Category : Electric conductivity
Languages : en
Pages : 112

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Author: Jean-Louis Barrat
Publisher: Cambridge University Press
ISBN: 9780521789530
Category : Science
Languages : en
Pages : 410

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Presenting a unified approach, this book focusses on the concepts and theoretical methods that are necessary for an understanding of the physics and chemistry of the fluid state. The authors do not attempt to cover the whole field in an encyclopedic manner. Instead, important ideas are presented in a concise and rigorous style, and illustrated with examples from both simple molecular liquids and more complex soft condensed matter systems such as polymers, colloids, and liquid crystals.

Author: Rolf Binder
Publisher: World Scientific
ISBN: 9813148764
Category : Science
Languages : en
Pages : 517

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This book provides a comprehensive state-of-the-art overview of the optical properties of graphene. During the past decade, graphene, the most ideal and thinnest of all two-dimensional materials, has become one of the most widely studied materials. Its unique properties hold great promise to revolutionize many electronic, optical and opto-electronic devices. The book contains an introductory tutorial and 13 chapters written by experts in areas ranging from fundamental quantum mechanical properties to opto-electronic device applications of graphene.