Download or read book ETUDE DES PLASMAS DENSES D HELIUM CREES DANS LES TUBES A ECLAIRS written by MOHAMMED.. EL BEZZARI and published by . This book was released on 1997 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES PLASMAS DENSES D'HELIUM ETUDIES SONT EN EQUILIBRE THERMODYNAMIQUE LOCAL ET FAIBLEMENT NON-IDEAUX. LES METHODES UTILISEES POUR LEUR DIAGNOSTIC REPOSENT SUR LES MESURES DU RAYONNEMENT CONTINU, DE L'INTENSITE DES RAIES SPECTRALES, DU RAPPORT ENTRE CES INTENSITES ET LEUR CONTINUUM ADJACENT, DE L'EPAISSEUR OPTIQUE DE LA RAIE A 587,5 NM ET DE L'INTERFEROMETRIE LASER A 3,39 M. LES DENSITES ELECTRONIQUES ET LES TEMPERATURES OBTENUES A PARTIR DU CONTINUUM ET DE L'INTENSITE DES RAIES SPECTRALES SONT TROP ELEVEES COMPAREES A CELLES DEDUITES DES MESURES D'INTERFEROMETRIE ET DE L'EPAISSEUR OPTIQUE, ET NE TRADUISENT PAS LE COMPORTEMENT REEL DU MILIEU. EN PRENANT EN COMPTE LA NON-IDEALITE DU PLASMA PAR L'INTRODUCTION DANS LE CALCUL DU CONTINUUM ET DE L'INTENSITE DES RAIES SPECTRALES DE L'EFFET DE LA DISTRIBUTION DES MICROCHAMPS IONIQUES, UN BON ACCORD EST OBTENU ENTRE LES DIFFERENTES METHODES DE DETERMINATION DES PARAMETRES. CET EFFET SE TRADUIT PAR UNE PROBABILITE STATISTIQUE DE REALISATION DES ETATS LIES DE L'ATOME D'AUTANT PLUS FAIBLE QUE L'ENERGIE DU NIVEAU EST ELEVEE ET QUE LA DENSITE ELECTRONIQUE EST FORTE. LES PROFILS RADIAUX DE TEMPERATURE ET DE DENSITE ELECTRONIQUE CALCULES CONDUISENT A DES VALEURS SUR L'AXE DU TUBE VARIANT RESPECTIVEMENT DE 18000 A 28000 K, ET DE 2 10#1#7 A 1,6 10#1#8 CM#-#3. L'ETUDE DES PROFILS DES RAIES SPECTRALES ATOMIQUES EMISES A PERMIS DE MESURER LEURS ELARGISSEMENTS ET DEPLACEMENTS PAR EFFET STARK EN FONCTION DES PARAMETRES DU PLASMA, ET DE COMPARER CES GRANDEURS A CELLES DONNEES PAR LES CALCULS THEORIQUES ET PAR D'AUTRES EXPERIMENTATEURS. L'INTERPRETATION DES VALEURS MESUREES DE L'IMPEDANCE ELECTRIQUE DU PLASMA D'APRES CELLES CALCULEES A PARTIR DE LA CONDUCTIVITE ELECTRIQUE, A MONTRE LA NECESSITE DE FAIRE INTERVENIR LA NON-IDEALITE EN INTRODUISANT UN PARAMETRE DE CORRECTION SUR LA LONGUEUR D'ECRANTAGE DU POTENTIEL COULOMBIEN.
Download or read book Etude des plasmas denses faiblement non ideaux crees dans les tubes a eclairs written by Yves Vitel and published by . This book was released on 1986 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES PLASMAS SONT PRODUITS DANS DES TUBES A ECLAIRS LINEAIRES EMPLIS DE GAZ RARES (AR, KR ET XE) SOUS DES PRESSIONS INITIALES DES 50 600 TORRS. ILS SONT PARCOURUS PAR DES IMPULSIONS DE COURANT DE 1KA PENDANT 1 A 2 MS. LE DEVELOPPEMENT DE LA COLONNE DE PLASMA A ETE PRECISEMENT ETUDIE. LE DIAGNOSTIC DU PLASMA EST REALISE PAR DIFFERENTES METHODES (SPECTROMETRIE ET INTERFEROMETRIE LASER), DANS SA PHASE QUASI-STATIONNAIRE. LES PROFILS RADIAUX DE DENSITE DE PARTICULES ET DE TEMPERATURE SONT OBTENUS AVEC UNE BONNE PRECISION
Download or read book ETUDE DES PROPRIETES RADIATIVES DES PLASMAS DE GAZ RARES CREES DANS LES TUBES A ECLAIRS written by AHMED.. SIYACOUN and published by . This book was released on 1992 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: DES PLASMAS DE GAZ RARES (ARGON, KRYPTON ET XENON), FAIBLEMENT NON-IDEAUX, HOMOGENES ET REPRODUCTIBLES, SONT CREES DANS DES TUBES A ECLAIRS LINEAIRES. LES PARAMETRES DE PLASMA SONT DEDUITS DES MESURES DE L'EMISSIVITE DU CONTINUUM, DE L'INTENSITE DES RAIES ATOMIQUES OPTIQUEMENT EPAISSES EN LEUR CENTRE, EN UTILISANT LES LOIS DE L'EQUILIBRE THERMODYNAMIQUE LOCAL DU PLASMA. L'EPAISSEUR OPTIQUE DU PLASMA A ETE MESUREE A DIFFERENTES LONGUEURS D'ONDE DANS L'INTERVALLE SPECTRAL 466-640 NM, SOIT A L'AIDE D'UN LASER A COLORANT (RHODAMINE 6G) POMPE PAR UN LASER A ARGON IONISE, SOIT EN UTILISANT DIRECTEMENT LES RAIES D'EMISSION IONIQUE DU LASER DE POMPE. LES RESULTATS SONT EXPRIMES EN TERME DE FACTEUR DE BIBERMAN. L'EFFET DE LA DENSITE ELECTRONIQUE, A UNE LONGUEUR D'ONDE DONNEE, N'EST PAS SENSIBLE SUR LE FACTEUR DE BIBERMAN. PAR CONTRE, UN ABAISSEMENT OPTIQUE IMPORTANT, QUI REPOUSSE LES LIMITES DE SERIES, A ETE OBSERVE. NOUS AVONS MESURE EGALEMENT L'ELARGISSEMENT ET LE DEPLACEMENT PAR EFFET STARK DES RAIES SPECTRALES EMISES. LES PROFILS DE RAIE SONT ENREGISTRES PAR UN SPECTROGAPHE A FORTE DISPERSION COUPLE A UN ANALYSEUR OPTIQUE MULTICANAL. LES RESULTATS EXPERIMENTAUX MONTRENT QUE L'ELARGISSEMENT ET LE DEPLACEMENT DES RAIES NE VARIENT PAS PROPORTIONNELLEMENT A LA DENSITE ELECTRONIQUE: LEURS VALEURS SONT PLUS FAIBLES QUE PREVUES PAR LA THEORIE SEMI-CLASSIQUE DE GRIEM. L'EXPLICATION PROPOSEE EST QUE LES CORRELATIONS ENTRE PARTICULES CHARGEES CONDUISENT, PAR UN EFFET D'ECRAN, A UN AFFAIBLISSEMENT DE LA CONTRIBUTION DES COLLISIONS A GRANDE DISTANCE DE L'EMETTEUR
Download or read book Etude des propri t s radiatives d un plasma d h lium hors quilibre written by Tony Lefevre and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude expérimentale des propriétés radiatives de plasmas d'hélium hors équilibres peut être réalisée par spectroscopie d'émission, un diagnostic non intrusif qui ne perturbe pas le système. Dans cette thèse, ce diagnostic a été utilisé sur des plasmas créés dans des tubes à décharges et dans une machine linéaire magnétisée MISTRAL. Les données expérimentales ont été confrontées aux résultats théoriques issus du code de physique atomique SOPHIA (modèle collisionnel-radiatif). Les tubes à décharge se caractérisent par des températures électroniques de l'ordre de l'électron-Volt et des densités électroniques de l'ordre de 10 exposant 12 cm-3. La première partie des résultats de cette thèse a permis de montrer que, dans ces conditions, le modèle C.C.C. (Convergent Close Coupling) reproduit au mieux la dynamique atomique d'un tel système. Dans la machine MISTRAL, la deuxième partie des résultats de cette thèse met en évidence la signature spectroscopique (rapports d'intensités de raies et étutés de raies et études radiales), de la présence d'électrons énergétiques ionisants et de la diffusion des particules chargées à travers un champ magnétique.
Download or read book Buyology written by Martin Lindstrom and published by Currency. This book was released on 2010-02-02 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: NEW YORK TIMES BESTSELLER • “A fascinating look at how consumers perceive logos, ads, commercials, brands, and products.”—Time How much do we know about why we buy? What truly influences our decisions in today’s message-cluttered world? In Buyology, Martin Lindstrom presents the astonishing findings from his groundbreaking three-year, seven-million-dollar neuromarketing study—a cutting-edge experiment that peered inside the brains of 2,000 volunteers from all around the world as they encountered various ads, logos, commercials, brands, and products. His startling results shatter much of what we have long believed about what captures our interest—and drives us to buy. Among the questions he explores: • Does sex actually sell? • Does subliminal advertising still surround us? • Can “cool” brands trigger our mating instincts? • Can our other senses—smell, touch, and sound—be aroused when we see a product? Buyology is a fascinating and shocking journey into the mind of today's consumer that will captivate anyone who's been seduced—or turned off—by marketers' relentless attempts to win our loyalty, our money, and our minds.
Download or read book Anagram Solver written by Bloomsbury Publishing and published by Bloomsbury Publishing. This book was released on 2009-01-01 with total page 719 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anagram Solver is the essential guide to cracking all types of quiz and crossword featuring anagrams. Containing over 200,000 words and phrases, Anagram Solver includes plural noun forms, palindromes, idioms, first names and all parts of speech. Anagrams are grouped by the number of letters they contain with the letters set out in alphabetical order so that once the letters of an anagram are arranged alphabetically, finding the solution is as easy as locating the word in a dictionary.
Download or read book The Storyteller s Thesaurus written by Troll Lord Games and published by Troll Lord Games. This book was released on 2015-04-30 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: Writers, game designers, teachers, and students ~this is the book youve been waiting for! Written by storytellers for storytellers, this volume offers an entirely new approach to word finding. Browse the pages within to see what makes this book different:
Download or read book An Introduction to Differential Manifolds written by Jacques Lafontaine and published by Springer. This book was released on 2015-07-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to differential manifolds. It gives solid preliminaries for more advanced topics: Riemannian manifolds, differential topology, Lie theory. It presupposes little background: the reader is only expected to master basic differential calculus, and a little point-set topology. The book covers the main topics of differential geometry: manifolds, tangent space, vector fields, differential forms, Lie groups, and a few more sophisticated topics such as de Rham cohomology, degree theory and the Gauss-Bonnet theorem for surfaces. Its ambition is to give solid foundations. In particular, the introduction of “abstract” notions such as manifolds or differential forms is motivated via questions and examples from mathematics or theoretical physics. More than 150 exercises, some of them easy and classical, some others more sophisticated, will help the beginner as well as the more expert reader. Solutions are provided for most of them. The book should be of interest to various readers: undergraduate and graduate students for a first contact to differential manifolds, mathematicians from other fields and physicists who wish to acquire some feeling about this beautiful theory. The original French text Introduction aux variétés différentielles has been a best-seller in its category in France for many years. Jacques Lafontaine was successively assistant Professor at Paris Diderot University and Professor at the University of Montpellier, where he is presently emeritus. His main research interests are Riemannian and pseudo-Riemannian geometry, including some aspects of mathematical relativity. Besides his personal research articles, he was involved in several textbooks and research monographs.
Download or read book Aeronomy written by P. M. Banks and published by Elsevier. This book was released on 2013-09-24 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aeronomy, Part A is an attempt to make a comprehensive exposition of the processes in aeronomy, the study of composition, movement, and thermal balance of the upper regions of the planetary atmosphere. The text covers topics such as atmospheric regions and atmospheric density, the temperature and molecular mass of the atmosphere; the permanent constituents and the molecular and isotonic composition of the homosphere; and the transition from the homosphere to the heterosphere. Also covered are topics such as the temperature gradient and energies in the thermosphere, conditions at 200km and above 250km, solar radiation and ionization, and aeronomic reactions. The book is recommended for scientists, especially natural physicists, who would like to know more about the field of aeronomy and its advances.
Download or read book Guide to Nuclear Power Cost Evaluation Equipment costs written by Kaiser Engineers and published by . This book was released on 1962 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Popular Astronomy written by Camille Flammarion and published by . This book was released on 1894 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beam Instrumentation and Diagnostics written by Peter Strehl and published by Springer Science & Business Media. This book was released on 2006-06-18 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the experience of many years of teamwork with my group, the beam diagnostics group of GSI. For a long time the group was also responsible for operating the machines and application programming. In my opinion, this connection was very e?cient: ?rst, because a beam diagnostic system has to place powerful tools at the operators’ disposal; second, because data evaluation and presentation of results for machine operation demand application programs which can be handled not only by skilled experts. On the other hand, accelerator developments and improvements as well as commissioning of new machines by specialists require more complex measu- ments than those for routine machine operation. A modern beam diagnostic system, including the software tools, has to cover these demands, too. Therefore, this book should motivate physicists, constructors, electronic engineers, and computer experts to work together during the design and daily use of a beam diagnostic system. This book aims to give them ideas and tools for their work. I would not have been able to write this book without a good education in physics and many discussions with competent leaders, mentors, and c- leagues. After working about 40 years in teams on accelerators, there are so many people I have to thank that it is impossible to mention them all by name here.
Download or read book Words to Rhyme with written by Willard R. Espy and published by Checkmark Books. This book was released on 2001 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: An easy-to-use dictionary of over 80,000 rhyming words.
Download or read book Frequency and Time written by P. Kartaschoff and published by . This book was released on 1978 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phonetics Theory and Application written by William R. Tiffany and published by McGraw-Hill Humanities, Social Sciences & World Languages. This book was released on 1977 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lecture Notes on Beam Instrumentation and Diagnostics written by Peter Forck and published by . This book was released on 2015-01-10 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lecture Notes on Beam Instrumentation and DiagnosticsBy Peter Forck
