Download or read book REALISATION D UNE SOURCE D IONS A BOMBARDEMENT ELECTRONIQUE A CATHODE CHAUDE written by Kamal Gragueb and published by . This book was released on 1984 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: REALISATION DE LA SOURCE D'IONS ADAPTEE AUX EXPERIENCES DE SPECTROSCOPIE LASER SUR FAISCEAUX D'IONS EN GEOMETRIE COLINEAIRE (DISTRIBUTION EN ENERGIE TRES ETROITE: = 6 EV); TEST DE LA SOURCE A BOMBARDEMENT ELECTRONIQUE A CATHODE CHAUDE SUR UN PETIT SPECTROMETRE DE MASSE, PUIS MONTAGE SUR UN ACCELERATEUR SERVANT AUX EXPERIENCES DE SPECTROSCOPIE LASER. APPLICATION A L'ETUDE DU SPECTRE DE PHOTOPREDISSOCIATION DE LA TRANSITION A**(2)SIGMA **(+)-X**(2)PI ; MISE EN EVIDENCE D'INTERACTIONS ROVIBRONIQUES FAIBLES : RESONANCE DE FERMI ENTRE NIVEAUX VIBRATIONNELS (100) ET (020) DE L'ETAT X POUR 1000**(2)PI ET RESONANCE DE TYPE L QUI PERTURBE FORTEMENT LA STRUCTURE ROVIBRATIONNELLE DU NIVEAU (020) DE L'ETAT A POUR 1000**(2)SIGMA **(+)

Download or read book tude et r alisation d une source d ions obtenus par bombardement lectronique written by Philippe Schneider and published by . This book was released on 1979 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Après avoir étudié les différents processus d’ionisation et leur utilisation dans les sources d’ions, on a constaté qu’il était nécessaire, pour réaliser une source d’ions quasi-universelle sans gaz auxiliaire, de pouvoir utiliser dans une même source plusieurs processus distincts. On a montré la complémentarité qui existait entre l’ionisation de surface et l’ionisation par bombardement électronique. On a réalisé un dispositif expérimental utilisant ce dernier processus. On décrit ce dispositif, en particulier le canon à électrons et on donne ses caractéristiques de fonctionnement et les améliorations possibles.

Download or read book R alisation d un tube acc l rateur d ions 700 kV au Laboratoire de synth se atomique d Ivry D veloppement des sources d ions lectrons oscillants written by Jean Sommeria-Klein and published by FeniXX. This book was released on 1956-01-01T00:00:00+01:00 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage est une réédition numérique d’un livre paru au XXe siècle, désormais indisponible dans son format d’origine.

Download or read book Premi re Conf rence Internationale sur les Sources d Ions written by and published by . This book was released on 1970 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book tude de r alisation d une source d ions de type super e b i t written by Gianni Giardino and published by . This book was released on 1992 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction à la physique des ions multicharges à basse énergie. Description des sources de la catégorie ebis-ebit pour la production de ces ions. Présentation du cahier des charges pour l'étude de réalisation d'une source super-ebit. Orientations technologiques (canon, glissement, champ magnétique, vide). Etude dans la configuration cathode percée et cathode pleine. Impact de la cathode percée sur le transport du faisceau d'électrons. Résultats de faisceaulogie en champ magnétique élevé (compression, profil de faisceau). Etude de la compression dans les rampes de champ. Description des choix et orientations choisies pour la réalisation (régime de compression, cas de la neutralisation du faisceau d'électrons, distributions en énergie)

Download or read book Index bibliographique du vide written by and published by . This book was released on 1969 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ETUDE REALISATION ET CARACTERISATION D UNE SOURCE MICRO ONDE D IONS REACTIFS written by ALAIN.. FARCHI and published by . This book was released on 1993 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJET DE CETTE THESE EST LA CONCEPTION D'UNE SOURCE D'IONS ORIGINALE QUI POSSEDE UNE DUREE DE VIE DE PLUS DE 100 HEURES POUR LA PRODUCTION D'IONS REACTIFS. CETTE SOURCE EST EQUIPEE D'UNE CATHODE PLASMA MICRO-ONDE QUI REMPLACE LA CATHODE CHAUDE DES SOURCES CLASSIQUES. ELLE EST COMPOSEE DE DEUX PARTIES: UNE CHAMBRE CATHODIQUE OU EST INJECTE LE GAZ POUR CREER UN PLASMA PAR EXCITATION MICRO-ONDE ACCOMPAGNE DE L'EFFET ELECTRON CYCLOTRON RESONANCE; UNE CHAMBRE ANODIQUE OU EST CREE UN SECOND PLASMA DE PLUS GRAND VOLUME. L'ANODE DE LA CHAMBRE ANODIQUE EST DISPOSEE SELON DEUX CONFIGURATIONS: ERIS (ELECTROSTATIC REFLEX ION SOURCE) OU UNE TIGE CONDUCTRICE EST PLACEE AU CENTRE DU PLASMA; MERIS (MULTIPOLAR ELECTROSTATIC REFLEX ION SOURCE) OU LA PAROI DE LA CHAMBRE ANODIQUE EST POLARISEE POSITIVEMENT. LA CARACTERISATION EXPERIMENTALE DES PLASMAS A ETE REALISEE EN FONCTION DES PARAMETRES DE LA DECHARGE. DANS LA CHAMBRE ANODIQUE, L'INTENSITE DE LA DECHARGE EN CONFIGURATION MERIS EST PLUS IMPORTANTE QUE DANS LA CONFIGURATION ERIS, CAR ELLE BENEFICIE D'UN MEILLEUR CONFINEMENT DES ELECTRONS PRIMAIRES. LA LARGEUR RADIALE DES FAISCEAUX EST DE 60 MM EN CONFIGURATION MERIS ET DE 40 MM EN CONFIGURATION ERIS. NOTRE CANON A IONS PERMET D'OBTENIR UN FAISCEAU OXYGENE AVEC UNE DENSITE IONIQUE DE 2 MA/CM#2. L'INCONVENIENT EST UNE FORTE POLLUTION DUE A LA PULVERISATION DES PAROIS METALLIQUES DE LA SOURCE. ENFIN, UNE APPLICATION ORIGINALE DE CETTE SOURCE EST LA SELECTION DE FAISCEAUX COMPOSES A 95% D'IONS ATOMIQUES O#+ ET N#+

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 A German English Dictionary for Chemists written by Austin M 1876-1956 Patterson and published by Scholar Select. This book was released on 2015-08-08 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book History of Electron Tubes written by Sōgo Okamura and published by IOS Press. This book was released on 1994 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Almost 90 years have passed since the invention of the thermionic electron valve in 1904 by Sir John Ambrose Fleming. During this period, the development of electron tubes created the so called Electroni Age. Electron tubes played the leading role in the electronic equipments until the middle of the 1950s when solid state devices such as transistors and integrated circuits replaced electron tubes in various applications and accelerated the electronic age.

Download or read book Electronics Engineer s Reference Book written by L. W. Turner and published by Newnes. This book was released on 1976 with total page 1526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Textbook of Engineering Physics written by M N Avadhanulu and published by S. Chand Publishing. This book was released on 2008 with total page 1204 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Txtbook of Engineering Physics is written with two distinct objectives:to provied a single source of information for engineering undergraduates of different specializations and provied them a solid base in physics.Successivs editions of the book incorporated topic as required by students pursuing their studies in various universities.In this new edition the contents are fine-tuned,modeinized and updated at various stages.

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 Science Past Science Future written by Isaac Asimov and published by Doubleday Books. This book was released on 1975 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of 43 essays on many subjects, from the various sciences to essays about society.

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 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.

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.