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Dissertations / Theses on the topic 'Atomic Charge'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Smith, P. E. "Charge calculations in molecular mechanics." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233873.

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2

Bennett, M. A. "Charge exchange between light ions." Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355835.

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3

Hudson, B. D. "Charge calculations : Theory and applications." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372697.

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4

Dethlefsen, Mark G. B. "Charge transfer processes of atomic hydrogen Rydberg states near surfaces." Thesis, University of Oxford, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.665491.

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When approaching a metal surface, the electronic structure of Rydberg atoms or molecules is perturbed by the surface potential and at close enough distances resonant ionisation of the Rydberg electron into the conduction band of the surface can occur. It is possible to interfere in this process and steer the ionisation distance by making use of the polarisability of the Rydberg orbital in the presence of electric fields. The resulting ions from the surface can extracted via electric fields and subsequently detected via well established ion detection schemes. The question of how this charge-tra

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5

Dethlefsen, Mark Georg Bernhard. "Charge transfer processes of atomic hydrogen Rydberg states near surfaces." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:1ef5ece3-43cf-40fc-a1fd-bf7c637e2d23.

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When approaching a metal surface, the electronic structure of Rydberg atoms or molecules is perturbed by the surface potential and at close enough distances resonant ionisation of the Rydberg electron into the conduction band of the surface can occur. It is possible to interfere in this process and steer the ionisation distance by making use of the polarisability of the Rydberg orbital in the presence of electric fields. The resulting ions from the surface can extracted via electric fields and subsequently detected via well established ion detection schemes. The question of how this charge-tra

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6

Sims, Gary Robert. "Characterization of a charge injection device detector for atomic emission spectroscopy." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184735.

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A Charge Injection Device (CID) detector has been evaluated as a detector for simultaneous multielement atomic emission spectroscopy. The CID was incorporated into a special liquid nitrogen cooled, computer controlled camera system. Electro-optical characterization of the CID and camera system included determination of readout noise, quantum efficiency, spatial crosstalk, temporal hysteresis, spatial response uniformity, and linear dynamic range. The CID was used as a spectroscopic detector for an echelle grating spectrometer equipped with a direct current plasma emission source. The spectrome

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7

Pilon, Michael Joseph. "Inductively coupled plasma atomic emission spectroscopy using charge injection device detection." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185630.

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A unique echelle spectrometer system employing charge injection device (CID) array detectors for use in inductively coupled plasma atomic emission spectroscopy (ICP-AES) is described. The echelle spectrometer described offers numerous advantages over previous systems including improved light throughput and extended wavelength coverage including the vacuum-ultraviolet (VUV) down to 165 nm. Several improvements in CID array detector technology are also described. Low exposure level linearity is improved and full well capacity is increased by fabricating the CIDs with <100> silicon as opposed to

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8

Forster, Christine. "Aspects of charge exchange in ion-atom collisions." Thesis, Durham University, 1990. http://etheses.dur.ac.uk/6189/.

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The straight line semi-classical Impact Parameter method has been modified for use with classical trajectories. Ion-atom collisions have been modelled using wavefunctions expanded in terms of atomic basis states which were centred on either the target or projectile ions. Total and differential charge exchange cross-sections are presented for (^4)He(^++) and (^4)He(^+) collisions within the centre of mass energy range 0.21 kev < E(_em) < 2.5 keV. Results using curved and straight line paths are compared with data from other authors. Significant trajectory effects were found at the lower energie

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9

Murphy, John Gerard. "Charge changing and ionising collisions between positive ions." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239212.

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10

Demone, Christopher. "Partial Atomic Charge Methods for Simulating Porous Frameworks with a Net Charge and their Applications to Gas Separations in Zeolites." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38180.

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Computational simulations using empirical force fields are frequently used to model guest-host interactions in porous periodic systems, where the interaction energy is broken into electrostatic and van der Waals contributions. While simulations such as these have been instrumental in progressing our understanding of neutral periodic systems, limitations in deriving partial atomic charges has largely contributed to the difficulty in modeling charged periodic frameworks. However, many nanoporous materials possess frameworks that have a net charge, which is balanced by counter-ions that intercala

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11

Cowen, M. C. "Space charge effects in ion sources for quadrupole mass spectrometers." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337960.

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12

Lindsay, Bernard Gregory. "State selected studies of some charge transfer and dissociative ionization collisions." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317102.

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13

Yousif, S. Y. "The dependence of atomic scattering cross sections and polarisabilities on electronic charge distribution." Thesis, University of York, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354412.

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14

Lamoureux, Burton Richard. "Charge injection device array detection for atomic spectroscopy with applications in gas chromatography." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185261.

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Very early in the history of atomic emission spectroscopy (AES) it was understood to be a powerful analytical tool. Until the 1930's the usefulness of atomic spectroscopy was not utilized very extensively even though its fundamental power was understood. The breakthrough that placed it in the standard chemistry laboratory was the discovery and implementation of the photoelectric effect. Since this discovery there has been a revolution in atomic spectroscopy which has brought it from the role of a humble servant used for primary elemental screening to an outstanding leader in applications of el

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15

BILHORN, ROBERT BYERS. "ANALYTICAL SPECTROSCOPIC CAPABILITIES OF OPTICAL IMAGING CHARGE TRANSFER DEVICES." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184186.

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The investigations described within this dissertation foretell the imminent revolution in optical analytical spectroscopy and conclusively demonstrate superior qualitative and quantitative analysis performance of a new system for atomic spectroscopy as compared to present, state-of-the-art instrumentation. The advent of a new class of multichannel detectors, the silicon charge transfer devices (CTDs) is shown to significantly impact ultraviolet, visible, and near-infrared analytical spectroscopy. An overview of the operation, characteristics, and performance of CTDs is presented including the

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16

Croft, Heather. "Theoretical slow atomic collision studies : charge transfer between atomic sodium and protons and the mutual neutralisation of hydrogen/deuterium and lithium ions." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318705.

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17

Trombley, Jeremy Brian. "Studies of Electrochemical Charge Transfer between Metals and Aqueous Solutions Using Atomic Force Microscopy." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1386048981.

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18

True, James Bruce 1967. "Investigation of the use of charge-injection-device detectors for multielement atomic absorption spectrometry." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282244.

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Graphite furnace atomic absorption spectrometry has excellent detection limits and accepts a wide variety of samples with little or no sample preparation. The method does, however, suffer from matrix interferences and a lack of highly capable multielement instrumentation. Continuum sources have been employed to GFAAS for multielement determinations, but the one dimensional array detectors used in these instruments can only observe a limited spectral range, limiting the multielement capabilities of these instruments. A continuum source, multielement graphite furnace atomic absorption spectromet

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19

Ai, Yong. "Approach to control, protect and switch charge transport through molecular junctions and atomic contact." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC125/document.

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Ces dernières décennies, l'électronique moléculaire a suscité un intérêt croissant. La construction de jonctions métal / molécules / métal est une étape fondamentale dans la compréhension de ce domaine. Nous avons été témoins d’avancées importantes concernant les jonctions moléculaires tant sur le plan théorique que sur le plan expérimental. Cette thèse se concentre principalement sur l'étude du transport de charge à travers les jonctions moléculaires. Des polymères conducteurs et des filaments de cuivre ont été déposés, par électrochimie avec un microscope électrochimique à balayage (SECM), e

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20

Matt, Manuel [Verfasser]. "Theoretical study of the charge and energy transport in metallic atomic-size contacts / Manuel Matt." Konstanz : Bibliothek der Universität Konstanz, 2017. http://d-nb.info/1130587681/34.

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21

Sheehan, Stafford Wheeler. "Atomic Layer Deposition Synthesis and Photoelectrochemical Charge Behavior in Tungsten, Iron, and Titanium Oxide Heterostructures." Thesis, Boston College, 2011. http://hdl.handle.net/2345/2203.

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Thesis advisor: Dunwei Wang<br>This thesis explores new approaches to synthesizing and understanding photoanodes for water splitting. By tuning materials' mophology on the nanoscale, their ability to absorb light energy and efficiently convert it in to chemical energy is improved. This is evident by an increase in photocatalytic efficiency and can be demonstrated with visible light sensitive catalysts. Production of these materials involved the development of alternative synthesis routes for traditional water splitting catalysts. Our hypothesis is further supported by probing charge dynamics u

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22

Peng, Yong. "Dependence of cross sections for multi-electron loss by 6 mev/amu xe18+ ions on target atomic number." Texas A&M University, 2003. http://hdl.handle.net/1969/98.

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23

Osaka, Miki. "Nanoscale Electronic Properties of Conjugated Polymer Films Studied by Conductive Atomic Force Microscopy." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225631.

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24

Lokar, William Joseph. "Surfactant Adsorption during Collisions of Colloidal Particles: A Study with Atomic Force Microscopy (AFM)." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/28369.

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The adsorption of cationic and zwitterionic surfactants is studied in aqueous electrolyte solutions. A Maxwell relation is applied to Atomic Force Microscopy (AFM) data to obtain changes in surfactant adsorption as a function of the separation between two glass surfaces. In addition, self-consistent field theory (SCF) is used to calculate the adsorption profiles and interaction energies when two solid surfaces are brought into close proximity. Addition of surfactant is shown to affect the surface forces when lateral surfactant chain interactions are significant. The surfactant adsorbs and

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25

Xu, Qiang. "The influence of droplets with net charge in atomic spectroscopy, toward an improved understanding of the chemical matrix effect." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ37672.pdf.

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26

Britton, Andrew James. "Charge transfer dynamics of adsorbate molecules on metal and semiconductor surfaces relating to fundamental processes in dye-sensitized solar cells." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13459/.

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The charge transfer dynamics between adsorbate molecules and surfaces are important for a variety of different technologies but especially for dye-sensitized solar cells. The main aim of this thesis was to study charge transfer between organic molecules and surfaces, especially relating to the situation observed in dye sensitized solar cells. This broad aim can be split into two distinct research objectives. One of these was to study the charge transfer between a Au (111) surface and a variety of different molecules using synchrotron-based photoemission spectroscopy. Resonant photoemission spe

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27

Dupays, Arnaud. "Transfert de charge muonique." Phd thesis, Université Paul Sabatier - Toulouse III, 2004. http://tel.archives-ouvertes.fr/tel-00006442.

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Cette thèse traite du transfert du muon entre l'hydrogène muonique et d'autres atomes et molécules. Récemment, Adamczak et al. ont proposé une méthode de mesure de la structure hyperfine de l'état fondamental de l'hydrogène muonique basée sur la dépendance énergétique du taux de transfert muonique sur l'oxygène. Réalisées dans les années 90 au Paul Scherrer Institut, des expériences ont en effet indiqué que le taux de transfert sur l'oxygène semblait augmenter d'un facteur 4 entre des énergies de collision thermiques (0.04 eV) et épithermiques (0.12 eV). Nos calculs avaient pour première motiv

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28

Tulpar, Aysen. "Studies on the Adsorption of Surfactants and Polymers to Surfaces and Their Effects on Colloidal Forces." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/39692.

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Surfactants, polymers, and their mixtures are widely used in commercial formulations of paints, water-based adhesives, detergents, food, and other products. This thesis describes measurements of the forces acting on colloidal particles in surfactant and polymer solutions. The change in force on addition of surfactants and polymers is usually caused by adsorption to an interface. In this thesis, I also describe the effect of surface charge density, surface crystallinity, surface heterogeneity, and preadsorbed polymer on surfactant adsorption. A new method for the stabilization of colloidal par

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29

Jaïdane, Nejmeddine. "Etude du transfert de charge entre des atomes de soufre et des protons." Paris 7, 1987. http://www.theses.fr/1987PA077121.

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Calculs scf et ci des courbes de potentiel du systeme s+h**(+) dans les symetriplets pi et delta internenant dans la reaction, avec des orbitales moleculaires occupees representees par des orbitales atomiques polarisees et des orbitales moleculaires virtuelles donnees par la projection d'orbitales atomiques orthogonalement aux orbitales occupees. Traitement de la dynamique de l'echange de charge dans une representation diabatique ou les couplages radiaux sont nuls et l'echange de charge est induit par des couplages de type electronique. Construction d'une representation effective de dimension

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30

Vyas, V. "AN ATOMIC FORCE MICROSCOPY BASED INVESTIGATION OF INTERFACIAL PROPERTIES OF BIOCOMPATIBLE CLUSTER ASSEMBLED THIN FILMS." Doctoral thesis, Università degli Studi di Milano, 2011. http://hdl.handle.net/2434/155514.

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Cluster-assembled nanostructured Titanium Oxide (ns-TiOx) deposited by Supersonic Cluster Beam Deposition (SCBD) recently proved to be a very promising biomaterial. The intrinsic nanostructure of this material, with fine granularity, high porosity and specific area, coupled to the chemical reactivity of the surface is likely to be a key element in determining the biological affinity of the material with nanometer-sized biomolecules, such as proteins. However, little is known of the specific role played by each of these surface properties in the interaction of proteins with nanostructured bioco

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31

Wandtke, Claudia Manuela. "New Applications of the Invariom Database." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://hdl.handle.net/11858/00-1735-0000-0023-3DF5-F.

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32

Kloth, Philipp [Verfasser], Wenderoth [Akademischer Betreuer] [Gutachter], Mathias [Gutachter], and Repp [Gutachter]. "Optical Excitation in Scanning Tunneling Microscopy: From Surface Photovoltages to Charge Dynamics oin the Atomic Scale / Philipp Kloth ; Gutachter: Wenderoth, Mathias, Repp ; Betreuer: Wenderoth." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1131354907/34.

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33

Olson, Grant T. "Improving Hybrid Solar Cells: Overcoming Charge Extraction Issues In Bulk Mixtures of Polythiophenes and Zinc Oxide Nanostructures." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1257.

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Organic photovoltaics (OPVs) have received a great deal of focus in recent years as a possible alternative to expensive silicon based solar technology. Current challenges for organic photovoltaics are centered around improving their lifetimes and increasing their power conversion efficiencies. One approach to improving the lifetime of such devices has been the inclusion of inorganic metal oxide layers, but interaction between the metal oxides and common conjugated polymers is not favorable. Here we present two methods by which the interactions between polythiophenes and nanostructured ZnO can

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34

Ismail, Iyas. "Développement d'un détecteur sans temps mort sensible en temps et en position : Application à l'étude des collisions de petits agrégats d'argon Ar+n sur une cible d'argon." Phd thesis, Université Paris Sud - Paris XI, 2005. http://tel.archives-ouvertes.fr/tel-00011289.

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Nous avons développé un nouveau système de détection sans temps mort, résolu en temps et en position et basé sur des galettes de microcanaux. Le principe de ce détecteur est de coupler deux systèmes de détection indépendants qui observent le même événement pour aboutir à leur localisation sans temps mort. Le premier système est constitué d'une caméra CCD capable de fournir l'information position. Le deuxième est constitué d'une carte de numérisation pour enregistrer le signal temps issu des galettes de microcanaux. Le lien entre ces deux systèmes est assuré par une anode constituée de deux lig

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35

RANGAMA, Jimmy. "Ionisation et excitation de l'atome de lithium par impact de particules chargées rapides : Identification des mécanismes de création de deux lacunes en couche K du lithium en fonction de la charge et de la vitesse du projectile." Phd thesis, Université de Caen, 2002. http://tel.archives-ouvertes.fr/tel-00002125.

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La spectroscopie d'électrons Auger est utilisée pour l'étude expérimentale des processus d'ionisation et d'excitation électronique de l'atome de lithium par impact d'ions (Kr34+ et Ar18+) et d'électrons à haute vitesse (de 6 à 60 u.a.). L'objectif est de déterminer la contribution relative des mécanismes responsables de l'ionisation-excitation en couche K du lithium pour des projectiles de charges Zp et de vitesses vp différentes. Un large domaine de paramètres de perturbation |Zp|/vp est exploré (|Zp|/vp = 0,05 - 0,7 u.a.). Les résultats sur la simple excitation en couche K montrent que l'int

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36

Teodoro, Tiago Quevedo. "Análise de fluxo de carga eletrônica em modos vibracionais." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-23042013-105726/.

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Diversas metodologias foram desenvolvidas nas últimas décadas para cálculo de propriedades que representassem quantitativamente a distribuição de carga eletrônica de forma mais simplista. A mais básica destas propriedades é chamada de carga atômica. Contudo, não havendo unanimidade quanto à utilização de um formalismo de cálculo de carga para situações abrangentes de estudo, há a necessidade de trabalhos voltados para uma análise comparativa entre as respostas destes formalismos em termos de carga atômica e parâmetros derivados. Assim, fez-se nesta dissertação uma investigação sobre valores de

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37

HARANGER, Fabien. "Etude de la pulvérisation du dioxyde d'uranium induite par des ions lourds multichargés de basse et très basse énergie cinétique ; effet de la charge du projectile." Phd thesis, Université de Caen, 2003. http://tel.archives-ouvertes.fr/tel-00006150.

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L'irradiation d'un solide par un faisceau d'ions peut conduire à l'émission d'atomes, de molécules ou d'agrégats, neutres ou ionisés, traduisant la mise en mouvement des atomes à proximité de la surface. L'étude de la pulvérisation permet alors de mieux comprendre l'état de la matière résultant de l'excitation induite par le passage de l'ion. Dans le cas d'ions lents multichargés, la neutralisation du projectile, au dessus de la surface, peut conduire à une forte excitation électronique dans un domaine de vitesse où les collisions élastiques avec les atomes de la cible sont à l'origine du rale

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38

Radspinner, David Andrew 1965. "Developments in atomic analysis and imaging utilizing scientific charge-transfer devices: Axial viewing of the inductively coupled plasma, advanced hollow cathode designs, and latent fingerprint imaging." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282524.

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This document describes the development of spectroscopic techniques which benefit from the use of charge-transfer devices. Both charge-coupled devices (CCD's) and charge-injection devices (CID's) are used in the techniques presented here such as atomic emission spectroscopy and latent fingerprint imaging. The use of a CID echelle system for axial viewing of the inductively coupled plasma (ICP) demonstrates the enhancement in sensitivity that can be obtained over tangential viewing. More importantly though, are the advantages afforded by simultaneous multi-element detection. Axial viewing of th

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39

Rousseau, Patrick. "Collisions rasantes d'ions ou d'atomes sur les surfaces : de l'échange de charge à la diffraction atomique." Phd thesis, Université Paris Sud - Paris XI, 2006. http://tel.archives-ouvertes.fr/tel-00106727.

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Ce mémoire de thèse rapporte deux études de l'interaction d'ions ou d'atomes d'énergie de l'ordre du<br />keV avec des surfaces isolantes lors de la diffusion en incidence rasante.<br />La première partie étudie les processus d'échange de charge au-dessus d'une surface de NaCl. En particulier, le mécanisme de neutralisation des ions S^+, C^+, Xe^+, H^+, O^+, Kr^+, N^+, Ar^+, F^+, Ne^+ et He^+ est déterminé par la mesure de la perte d'énergie en coïncidence avec la détection des électrons. Ces résultats montrent l'importance de la double-capture électronique pour la neutralisation des ions ayan

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40

SJAKSTE, Jelena. "Etude par propagation de paquets d'ondes de la dynamique du transfert électronique." Phd thesis, Université Paris Sud - Paris XI, 2004. http://tel.archives-ouvertes.fr/tel-00008743.

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Ce travail de thèse est une étude théorique et numérique du processus de transfert de charge résonnant(TCR), entre un atome (ion) et une surface métallique pendant une collision. Le TCR correspond au passage d'un électron de l'atome vers le métal, sans changer d'énergie. On étudie le TCR dans des systèmes à plusieurs états électroniques. Ces états peuvent être localisés sur un projectile, ou sur un projectile et sur une impureté de la surface. Une attention particulière est portée aux transitions induites entre différents états du système par le mouvement du projectile. La Méthode de Propagati

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41

Prime, Dominic Charles. "Switching mechanisms, electrical characterisation and fabrication of nanoparticle based non-volatile polymer memory devices." Thesis, De Montfort University, 2010. http://hdl.handle.net/2086/3314.

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Polymer and organic electronic memory devices offer the potential for cheap, simple memories that could compete across the whole spectrum of digital memories, from low cost, low performance applications, up to universal memories capable of replacing all current market leading technologies, such as hard disc drives, random access memories and Flash memories. Polymer memory devices (PMDs) are simple, two terminal metal-insulator-metal (MIM) bistable devices that can exist in two distinct conductivity states, with each state being induced by applying different voltages across the device terminals

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42

Monart, Brigitte. "Etude experimentale del'emission secondaire (ions atomiques et moleculaires, agregats, electrons) induite par bombardement de surface par des ions lourds energetiques ( equiv. A mev/u) : effets de l'etat de charge des projectiles." Paris 7, 1988. http://www.theses.fr/1988PA077121.

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Etude de l'emission secondaire en fonction de la vitesse en projectile, de l'angle d'incidence du faisceau par rapport a la cible (minerale ou organique) et surtout de l'etat de charge au projectile, par spectrometrie de masse a temps de vol principalement: cette emission depend fortement de la charge du projectile et aussi du changement d'etat de charge a l'interieur du materiau. Interpretation des resultats a l'aide du modele de maynard et al. , en supposant l'existence d'une profondeur d'interaction ion primaire-materiau qui depend du type d'ions secondaires et de la charge de l'ion inciden

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43

Suraud, Marie-Gabrielle. "Etude par spectrométrie X (10 [angström] [inférieur ou égal à] [lamda] [inférieur ou égal à] 100 [angström]) de l'échange de charge lors de collision à basse énergie, entre un ion multichargé et une cible neutre." Grenoble 1, 1988. http://www.theses.fr/1988GRE10038.

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Mesures des valeurs absolues des sections efficaces d'emission de rayons x, dont on deduit les valeurs absolues des sections efficaces de capture, pour les systemes c**(6+)-he,h::(2), n**(7+)-he,h::(2), o**(8+)-he,h::(c). Pour les projectiles a 2 electrons dans l'etat metastable 1s2s **(3)s, l'echange de charge peut s'accompagner de l'excitation de l'electron "2s" de l'ion incident vers des etats 1s2pnl **(3)p avec une probabilite variant suivant le systeme de collision, l'echange de charge simple restant preponderant dans tous les cas

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44

Walker, Paul Andreas. "Laser wakefield acceleration of electrons to GeV energies and temporal laser pulse compression characterization in a capillary discharge waveguide." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:e347422e-b097-4128-8733-f3686cc452fe.

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This thesis presents results from three strands of experimental work aimed towards establishing more reproducible, higher energy, and more accurately measured electron beams generated by a laser-driven plasma accelerator. The first experiment calibrated two types of detector frequently used to measure the bunch charge in laser wakefield accelerator experiments, namely scintillating screens and image plates. The experiments undertaken at the DAFNE beam test facility in Frascati, Italy, confirmed that the fluorescence signal from Kodak Lanex Regular screens varies linearly with the charge densit

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Maisonny, Rémi. "Étude expérimentale de la fragmentation d'agrégats d'eau induite par impact d'ions multichargés." Phd thesis, Université de Caen, 2011. http://tel.archives-ouvertes.fr/tel-00651459.

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Cette thèse présente une étude de la fragmentation d'agrégats d'eau neutres induite par impact d'ions multichargés lents et rapides. L'étude, majoritairement réalisée dans le régime de capture dominant, montre que les patterns de fragmentation varient fortement avec la charge du projectile. L'agrégat se dissocie en de nombreux fragments chargés lorsque la charge du projectile est grande (q=20), tandis que la dissociation n'est trouvée que " partielle " dans le cas de projectiles de plus petites charges (q=2). Un chauffage plus important de l'agrégat est observé dans le cas des projectiles mult

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Jahier, Erwan. "Voies ouvertes par des cellules en saphir pour des expériences de violation de parité détectée par émission stimulée." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2001. http://tel.archives-ouvertes.fr/tel-00000883.

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Nous étudions les performances et limites de cellules à césium en<br />saphir pour une expérience de physique atomique visant à une mesure précise<br />d'un effet de violation de parité (PV) associé à l'échange du boson Zo<br />dans l'atome de césium. Une telle mesure permet un test à très basse énergie du<br />modèle standard électrofaible. Il s'agit d'une expérience pompe-sonde sur le<br />système 6S1/2-7S1/2-6P3/2, menée en régime impulsionnel, dans une<br />vapeur dense de césium (2.10^14 atomes/cm3), soumise à un champ<br />électrique E= (2kV/cm) statique à<br />l'échelle des impulsions l

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Nijs, Gerardus de. "Pathways to charge equilibration following multiple electron exchange between highly charged ions and atoms." [S.l. : [Groningen] : s.n.] ; [University Library Groningen] [Host], 1996. http://irs.ub.rug.nl/ppn/148625770.

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48

Farizon, Michel. "Agrégats d'hydrogène - Structure et interaction avec des cibles solides." Phd thesis, Université Claude Bernard - Lyon I, 1988. http://tel.archives-ouvertes.fr/tel-00795192.

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49

Fernandez, Garrillo Pablo Arturo. "Développement de techniques de microscopie Kelvin hautement résolues et photomodulées pour l'étude de systèmes photovoltaïques." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY031/document.

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Cette thèse propose, décrit et utilise un ensemble de techniques basées sur la microscopie à force atomique sous ultravide pour la cartographie simultanée, à l'échelle nanométrique, de la topographie de surface et des dynamiques temporelles des photo-porteurs. Ainsi, en contrôlant la dépendance du photo-potentiel de surface moyen mesuré par microscopie à force de sonde Kelvin en fonction de la fréquence de répétition d'une source lumineuse externe d'excitation, le dispositif expérimental permet d’accéder aux dynamiques temporelles du photo-potentiel de surface qui, à leur tour, permettent d'ét

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Farizon-Mazuy, Bernadette. "Echange de charge et excitation dans des feuilles minces amorphes ou cristallines d'ions atomiques légers (80-600 KeV-u), d'agrégats d'hydrogène (30-120 KeV-u) et d'ions Xe canalisés (25 MeV-u)." Phd thesis, Université Claude Bernard - Lyon I, 1987. http://tel.archives-ouvertes.fr/tel-00747323.

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