Download or read book Analyse par fluorescence atomique avec excitation laser dans un plasma d argon written by Robert AUBANEL and published by . This book was released on 1991 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Laser excited Atomic Fluorescence Spectroscopy for Characterization of an Argon Inductively Coupled Plasma written by Kenneth Joel Fredeen and published by . This book was released on 1985 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mise au point d un diagnostic de fluorescence induite par laser et application l tude d un plasma d argon multipolaire written by Laurence Chérigier and published by . This book was released on 1994 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS AVONS DEVELOPPE UN DIAGNOSTIC DE FLUORESCENCE INDUITE PAR LASER POUR ETUDIER UN PLASMA D'ARGON CREE PAR UNE DECHARGE THERMOELECTRONIQUE DANS UNE ENCEINTE A CHAMP MAGNETIQUE MULTIPOLAIRE. CE DIAGNOSTIC, BASE SUR L'EFFET DOPPLER, PERMET UNE MESURE PRECISE DE LA FONCTION DE DISTRIBUTION EN VITESSE DES IONS (FDVI) DANS UN PLASMA DE BASSE DENSITE (10#8-10#9 CM##3). UN PROGRAMME INFORMATIQUE PERMET D'AJUSTER LES PARAMETRES D'UN MODELE ANALYTIQUE AUX COURBES EXPERIMENTALES. NOUS AVONS CONSTATE QUE LES FDVI DANS LE CORPS DU PLASMA SONT GAUSSIENNES. POUR UNE PRESSION DE NEUTRES DE 6 10##4 TORR, LA LARGEUR A MI-HAUTEUR NOUS DONNE LA TEMPERATURE IONIQUE DE L'ORDRE DE 0.05 EV, CE QUI EST INFERIEUR A LA TEMPERATURE MESUREE DANS DES CONDITIONS SEMBLABLES PAR DES ANALYSEURS D'ENERGIE. LA VITESSE MOYENNE DES IONS PEUT ETRE RELIEE AU GRADIENT DE POTENTIEL QUI LES ACCELERE VERS LES PAROIS. NOUS AVONS ETUDIE LES CONDITIONS AUX LIMITES DU PLASMA, FORMEES PAR LE CHAMP MAGNETIQUE OU LE VOISINAGE DE LA GAINE ELECTROSTATIQUE DEVANT UNE PLAQUE METALLIQUE. EN EFFECTUANT DES MESURES DANS UNE ARCHE DU CHAMP MAGNETIQUE MULTIPOLAIRE, NOUS MONTRONS SON INFLUENCE SUR LES TRAJECTOIRES DES IONS, SOUMIS A LA FORCE DE LORENTZ. ILS SONT EN PARTICULIER DEVIES ET FORTEMENT ACCELERES DANS LA DIRECTION PARALLELE AUX AIMANTS. LES FONCTIONS DE DISTRIBUTION S'ELARGISSENT DE FACON ANISOTROPE. EN L'ABSENCE DE CHAMP MAGNETIQUE, LES FONCTIONS DE DISTRIBUTION ENREGISTREES PRES D'UNE PLAQUE AU POTENTIEL FLOTTANT OU BIEN A LA MASSE NE SONT PAS GAUSSIENNES: LEUR PROFIL RESSEMBLE A CELUI CALCULE THEORIQUEMENT PAR EMMERT ET AL. NOUS AVONS DONC UTILISE CE MODELE POUR AJUSTER NOS RESULTATS EXPERIMENTAUX. L'ACCORD EST CEPENDANT QUALITATIF, LA TEMPERATURE IONIQUE DANS LE CAS DU MODELE EST FIXEE DES LA CREATION DES IONS ALORS QUE NOUS OBSERVONS EXPERIMENTALEMENT UN ELARGISSEMENT DES DISTRIBUTIONS A L'APPROCHE DE LA PLAQUE
Download or read book ETUDE DE L ABLATION LASER COMME SYSTEME D INTRODUCTION D UN SPECTROMETRE D EMISSION PLASMA INDUIT PAR HAUTE FREQUENCE POUR L ANALYSE DES VERRES written by MURIELLE.. DUCREUX and published by . This book was released on 1994 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: ACTUELLEMENT, L'ANALYSE ELEMENTAIRE DE NOMBREUX TYPES DE MATERIAUX EST EFFECTUEE PAR DES METHODES NECESSITANT UNE PREPARATION FASTIDIEUSE DES ECHANTILLONS (SPECTROMETRIE D'ABSORPTION ET D'EMISSION ATOMIQUE, FLUORESCENCE X, SPECTROMETRIE D'ARC), QUI PEUVENT INDUIRE DES CONTAMINATIONS OU DES PERTES. AUSSI, EXISTE-T-IL UNE FORTE DEMANDE POUR L'ANALYSE DIRECTE DE SOLIDES. PARMI LES DIVERSES METHODES ETUDIEES (DECHARGE LUMINESCENTE, SPECTROMETRIE ETINCELLE), LE COUPLAGE ABLATION LASER SPECTROMETRIE D'EMISSION ATOMIQUE ICP CONNAIT UN DEVELOPPEMENT CROISSANT. CETTE TECHNIQUE PRESENTE EN EFFET DES AVANTAGES CERTAINS: ANALYSE DE TOUT TYPE DE MATERIAU, CONDUCTEUR OU ISOLANT, CELLE-CI POUVANT ETRE GLOBALE OU PONCTUELLE DUE A LA POSSIBILITE DE FOCALISER LE FAISCEAU LASER A UN ENDROIT PRECIS DE LA CIBLE (EXCELLENTE RESOLUTION SPATIALE). LE PRINCIPE DE LA METHODE CONSISTE A UTILISER LE MECANISME D'ABLATION COMME SOURCE DE FINES PARTICULES QUI SONT TRANSPORTEES PAR UN COURANT D'ARGON DANS UN PLASMA DE TYPE ICP POUR ETRE ATOMISEES, EXCITEES ET IONISEES. LE FAISCEAU POLYCRHOMATIQUE RESULTANT EST DISPERSE PAR UN RESEAU EN RADIATIONS MONOCHROMATIQUES, QUI SONT ALORS DETECTEES PAR DIFFERENTS SYSTEMES RECEPTIFS: PHOTOMULTIPLICATEURS, DETECTEURS DE TYPE CCD L'EVALUATION DE LA TECHNIQUE POUR L'ANALYSE QUANTITATIVE DES VERRES CONSTITUE L'OBJECTIF DE CE TRAVAIL. COMPTE-TENU DE LA TRANSPARENCE DE CES MATERIAUX DANS LES DOMAINES DU VISIBLE ET DU PROCHE INFRAROUGE, DES LASERS EMETTANT DANS L'ULTRAVIOLET ONT DUS ETRE UTILISES: UN LASER EXCIMERE DE TYPE XECL ET UN LASER ND:YAG TRIPLE ET QUADRUPLE EN FREQUENCE EMETTANT RESPECTIVEMENT A 308, 355 ET 266 NM. L'ETUDE DE L'INTERACTION LASER-MATIERE (QUANTITES DE MATIERE ABLATEES, FORMES ET DIMENSIONS DES CRATERES,) A PERMIS DE COMPARER CES DIFFERENTES SOURCES D'INTRODUCTION D'ECHANTILLON DANS LE PLASMA, ET D'EXPLIQUER LES DIFFERENCES DE PERFORMANCES ANALYTIQUES (REPETABILITE, REPRODUCTIBILITE, JUSTESSE, LIMITES DE DETECTION) OBTENUES POUR CHACUNE. LE DOMAINE D'APPLICATION DE LA METHODE A PU EGALEMENT ETRE ETENDU GRACE A DES ETUDES PRELIMINAIRES CONCERNANT L'ANALYSE DE SURFACES DE FAIBLES EPAISSEURS, L'ANALYSE SEMI-QUANTITATIVE DE VERRES ET DE MATIERES PREMIERES, L'ANALYSE QUALITATIVE DE DEFAUTS
Download or read book SPECTROSCOPIE LASER SUR NIVEAUX ELECTRONIQUES EXCITES D EXCIMERES ET D IONS DE GAZ RARES written by MUSTAPHA.. HEMICI and published by . This book was released on 1994 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: DES ETUDES DES ETATS EXCITES D'EXCIMERES ET D'IONS DE GAZ RARES ONT ETE REALISEES EN COMBINANT SPECTROSCOPIE DE L'ULTRAVIOLET DU VIDE (VUV) ET SPECTROSCOPIE LASER RESOLUE EN TEMPS. LES ETATS ELECTRONIQUES 1U, 0U- RELAXES, DE L'EXCIMERE DE KRYPTON SONT PREPARES PAR UNE EXCITATION ATOMIQUE VUV FOURNIE PAR L'EMISSION MONOCHROMATISEE D'UN PLASMA LASER D'ARGON. LA REEXCITATION EST REALISEE PAR UN LASER A COLORANT ACCORDABLE DECALABLE EN TEMPS VIS A VIS DE LA PREMIERE EXCITATION. CETTE REEXCITATION FOURNIT UNE INFORMATION D'UNE PART PUREMENT MOLECULAIRE ET D'AUTRE PART COMBINEE ATOMIQUE ET MOLECULAIRE PAR LA MESURE SIMULTANEE DE LA FLUORESCENCE REDUITE PAR LASER OU LRF (LASER REDUCED FLUORESCENCE) ET DE L'IONISATION MULTIPHOTONIQUE RESONANTE OU REMPI (RESONANTLY ENHANCED MULTIPHOTON IONIZATION). LES SPECTRES VISIBLE ET INFRA-ROUGE SONT INTERPRETES PAR COMPARAISON AVEC DES SPECTRES SYNTHETIQUES CALCULES. LE CALCUL UTILISE DES POTENTIELS MOLECULAIRES AB INITIO RECENTS, LES MOMENTS DE TRANSITIONS AB INITIO CALCULES ENTRE LES ETATS CONCERNES, LES FACTEURS DE FRANCK-CONDON ET LA DISTRIBUTION DE BOLTZMANN. LE COUPLAGE SPIN-ORBITE EST MIS EN EVIDENCE POUR LA PREMIERE FOIS DANS LES SPECTRES INFRA ROUGE. DES STRUCTURES TRES DIFFERENTES SONT OBSERVEES QUAND DES ETATS SUPERIEURS PI-G ET SIGMA-G SONT IMPLIQUES PAR SUITE DE LA FORME DIFFERENTE DES COURBES DE POTENTIELS QUI PRESENTENT UN CROISEMENT EVITE CONDUISANT A LA PREDISSOCIATION. DES RESULTATS PRELIMINAIRES DE SPECTRES D'ABSORPTION TRANSITOIRE ATOMIQUE ET IONIQUE, OBTENUS EN SONDANT UN PLASMA LASER, SONT DISCUTES EN VUE DE DEVELOPPEMENTS FUTURS
Download or read book 2D Laser collision Induced Fluorescence in Low pressure Argon Discharges written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Development and application of laser-collision induced fluorescence (LCIF) diagnostic technique is presented for the use of interrogating argon plasma discharges. Key atomic states of argon utilized for the LCIF method are identified. A simplified two-state collisional radiative model is then used to establish scaling relations between the LCIF, electron density, and reduced electric fields (E/N). The procedure used to generate, detect and calibrate the LCIF in controlled plasma environments is discussed in detail. LCIF emanating from an argon discharge is then presented for electron densities spanning 109 e cm-3 to 1012 e cm-3 and reduced electric fields spanning 0.1 Td to 40 Td. Lastly, application of the LCIF technique for measuring the spatial distribution of both electron densities and reduced electric field is demonstrated.
Download or read book Liquid Sample Introduction in ICP Spectrometry written by José-Luis Todoli and published by Elsevier. This book was released on 2011-04-18 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inductively coupled plasma atomic or mass spectrometry is one of the most common techniques for elemental analysis. Samples to be analyzed are usually in the form of solutions and need to be introduced into the plasma by means of a sample introduction system, so as to obtain a mist of very fine droplets. Because the sample introduction system can be a limiting factor in the analytical performance, it is crucial to optimize its design and its use. It is the purpose of this book to provide fundamental knowledge along with practical instructions to obtain the best out of the technique. - Fundamental as well as practical character - Troubleshooting section - Flow charts with optimum systems to be used for a given application
Download or read book Laser Spectroscopy 1 written by Wolfgang Demtröder and published by Springer. This book was released on 2014-05-07 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded. While the general concept is unchanged, the new edition features a broad array of new material, e.g., ultrafast lasers (atto- and femtosecond lasers) and parametric oscillators, coherent matter waves, Doppler-free Fourier spectroscopy with optical frequency combs, interference spectroscopy, quantum optics, the interferometric detection of gravitational waves and still more applications in chemical analysis, medical diagnostics, and engineering.
Download or read book Elemental Speciation in Human Health Risk Assessment written by P. Apostoli and published by World Health Organization. This book was released on 2006 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Definitions of species and speciation - - Strructural aspects of speciation - - Analytical techniques and methodology - - Bioaccessibility and bioavailability - - Toxicokinetics and biological monitoring - - Molecular and cellular mechanisms of metal toxicity - - Health effects - - Conclusions and recommendations.
Download or read book Sample Introduction Systems in ICPMS and ICPOES written by Diane Beauchemin and published by Newnes. This book was released on 2020-03-15 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sample Introduction Systems in ICPMS and ICPOES provides an in-depth analysis of sample introduction strategies, including flow injection analysis and less common techniques, such as arc/spark ablation and direct sample insertion. The book critically evaluates what has been accomplished so far, along with what can be done to extend the capabilities of the technique for analyses of any type of sample, such as aqueous, gaseous or solid. The latest progress made in fields, such as FIA, ETV, LC-ICP-MS and CE-ICP-MS is included and critically discussed. The book addresses problems related to the optimization of the system, peak dispersion and calibration and automatization. - Provides contributions from recognized experts that give credibility to each chapter as a reference source - Presents a single source, providing the big picture for ICPMS and ICPOES - Covers theory, methods, selected applications and discrete sampling techniques - Includes access to core data for practical work, comparison of results and decision-making
Download or read book Soil Analysis written by J. Gautheyrou and published by CRC Press. This book was released on 2001-01-01 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this book is to provide a better understanding of tools for soil analysis in order to use them more efficiently. It covers sampling problems as well as difficulties relating to actual analysis and quality control.
Download or read book Camel Clinical Biochemistry and Hematology written by Bernard Faye and published by Springer. This book was released on 2018-08-27 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work brings together a wealth of data regarding the reference values and factors of variation in biochemical parameters used by camel veterinarians and scientists to determine these animals’ nutritional and clinical status. It also explores several technical aspects involved in determining these parameters, sampling procedures, and essential elements in the interpretation of the results. Though many texts are available on small and large ruminants, much less is known about species confined to the marginal zones of tropical and Mediterranean countries, such as camels. This book addresses precisely this research gap, on the one hand by presenting an extensive review of the literature, and on the other by synthesizing the outcomes of the authors’ numerous previous works. In veterinary medicine, blood tests to help diagnose diseases in cattle were first proposed nearly a century ago, but were mainly developed in the 1960s, initially at specialized research or veterinary services laboratories, and eventually, with the advent of new equipment and the miniaturization of the analyzers, finding their way into veterinarians’ cabinets. Beyond their diagnostic value, veterinary surgeons and zootechnicians also speculated on the potential use of blood tests to evaluate animals’ nutritional status. Thus, a whole range of analyses are now proposed to the stakeholders responsible for animal health. Such analyses could help to define a metabolic profile, which would offer a valuable decision-making tool for experts and researchers alike.
Download or read book Handbook of Soil Analysis written by Marc Pansu and published by Springer Science & Business Media. This book was released on 2007-04-18 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is a reference guide for selecting and carrying out numerous methods of soil analysis. It is written in accordance with analytical standards and quality control approaches. It covers a large body of technical information including protocols, tables, formulae, spectrum models, chromatograms and additional analytical diagrams. The approaches are diverse, from the simplest tests to the most sophisticated determination methods.
Download or read book Crystal Growth Technology written by Hans J. Scheel and published by John Wiley & Sons. This book was released on 2009-07-31 with total page 695 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume deals with the technologies of crystal fabrication, of crystal machining, and of epilayer production and is the first book on industrial and scientific aspects of crystal and layer production. The major industrial crystals are treated: Si, GaAs, GaP, InP, CdTe, sapphire, oxide and halide scintillator crystals, crystals for optical, piezoelectric and microwave applications and more. Contains 29 contributions from leading crystal technologists covering the following topics: * General aspects of crystal growth technology * Silicon * Compound semiconductors * Oxides and halides * Crystal machining * Epitaxy and layer deposition Scientific and technological problems of production and machining of industrial crystals are discussed by top experts, most of them from the major growth industries and crystal growth centers. In addition, it will be useful for the users of crystals, for teachers and graduate students in materials sciences, in electronic and other functional materials, chemical and metallurgical engineering, micro-and optoelectronics including nanotechnology, mechanical engineering and precision-machining, microtechnology, and in solid-state sciences.
Download or read book Theoretical Atomic Physics written by Harald Siegfried Friedrich and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition presents the recent developments in atomic physics. Beginning with a review of quantum mechanics, the book covers important areas of theoretical atomic physics, including semiclassical theory, periodic orbit theory, scaling properties for atoms in external fields, threshold behavior of ionization cross sections, and classical quantum dynamics of two-electron atoms.
Download or read book Nonlinear Wave Processes in Excitable Media written by Arunn V. Holden and published by Springer. This book was released on 2013-12-21 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a NATO ARW held in Leeds, UK, September 11-15, 1989
Download or read book Current Programs written by and published by . This book was released on 1975 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
