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Dissertations / Theses on the topic 'Electronic secondary emission'

Author: Grafiati

Published: 14 September 2024

Last updated: 31 July 2025

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1

Ludwick, Jonathan. "Physics of High-Power Vacuum Electronic Systems Based on Carbon Nanotube Fiber Field Emitters." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1613745398331048.

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2

Ransley, Chau Diem Nguyen. "Secondary electron emission from organic monolayers." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612907.

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3

Farhang, Mohammad Hossein. "Secondary electron emission yield from carbon samples." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318220.

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4

Vempati, Pratyusha. "Analytical fits to Secondary Emission Yield Data." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1523635397854801.

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5

Cormier, Pierre Richard Sébastien. "Secondary electron emission properties of molybdenum disulfide thin films." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq31189.pdf.

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6

Muellejans, Harald. "Secondary electron emission in coincidence with primary energy losses." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240071.

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7

Vaz, Raquel Maria Amaro. "Studies of the secondary electron emission from diamond films." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616564.

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The aim of the present research was the development of an optimised secondary electron emission (SEE) diamond film to use as a dynode material. The project was a partnership between the School of Chemistry in the University of Bristol, the Space Research Centre (SRC) at the University of Leicester and Photek, a company specialized in the manufacture of systems for photon detection. The role of Bristol in this project consisted in the preparation of CVD diamond films and their characterization, before supply to the other collaborators. SEE characterisation of the samples was performed at SRC an

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8

Thomson, Clint D. "Measurements of the Secondary Electron Emission Properties of Insulators." DigitalCommons@USU, 2005. https://digitalcommons.usu.edu/etd/2093.

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Measurements of the electron-induced electron emission properties of insulators are important to many applications including spacecraft charging, scanning electron microscopy, electron sources, and particle detection technology. However, these measurements are difficult to make since insulators can charge either negatively or positively under charge particle bombardment that in turn alters insulator emissions. In addition, incident electron bombardment can modify the conductivity, internal charge distribution, surface potential, and material structure in ways that are not well understood. A pr

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9

Haidara, Modibo. "Impulsions de Trichel dans le cyclohexane liquide et les gaz comprimés." Grenoble 1, 1988. http://www.theses.fr/1988GRE10160.

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Resultats d'etude de la conduction electrique de liquides non polaires tres purs (cyclohexane, n-propane) en geometrie pointe-plan, en fonction du rayon de courbure de la pointe et de la pression hydrostatique (p<->10**(7)pa)

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10

Davies, Robert. "Measurement of Angle-Resolved Secondary Electron Spectra." DigitalCommons@USU, 1999. https://digitalcommons.usu.edu/etd/1698.

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Theoretical formulations of secondary electron emission over the past 20 years have exceeded the confirming ability of available measurements. An instrument has been developed and tested for the purpose of obtaining simultaneous angle- and energy-resolved (AER) secondary and backscattered electron measurements for energetic electrons incident on conducting surfaces. The instrument is found to be in good working order and the data quality found to be excellent for nearly all angles and energies investigated. A representative set of AER measurements has been acquired for 1500 e V electrons norma

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11

Tucek, John Christopher. "Collision-induced secondary electron and negative ion emission from metallic surfaces." W&M ScholarWorks, 1997. https://scholarworks.wm.edu/etd/1539623909.

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Absolute yields of negative ions and secondary electrons resulting from collisions of positive sodium ions (Na{dollar}\sp{lcub}+{rcub}){dollar} with polycrystalline aluminum (Al) and molybdenum (Mo) surfaces and the Mo (100) surface have been measured as a function of the oxygen (O) coverage, from none up to several monolayers, for impact energies, E {dollar}<{dollar} 500 eV. Negative oxygen ions (O{dollar}\sp{lcub}-{rcub}){dollar} are found to be the dominant sputtered negative ions and for the three surfaces at all O coverages and Na{dollar}\sp{lcub}+{rcub}{dollar} impact energies. The O{dol

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12

Chung, To Sang Marc. "Transport électronique et émission secondaire électronique dans un propulseur de Hall." Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSES077.

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L'essor des activités spatiales pour satellite a permis le développement de nombreuses technologies de propulseurs électriques. Parmi elles, le propulseur à courant de Hall connaît un intérêt grandissant de par son coût, ses caractéristiques de poussée et d'impulsion spécifique. Si cette technologie existe depuis au moins cinquante ans, il n'en demeure pas moins que simuler et comprendre son fonctionnement reste hors de portée. La dynamique des particules chargées en configuration de champs croisés ExB est riche d'instabilités dont le rôle dans le fonctionnement du propulseur n'a pas atteint u

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13

Pitts, R. A. "Ion energy, sheath potential and secondary electron emission in the tokamak edge." Thesis, Royal Holloway, University of London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508346.

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14

Wu, Qiong. "Measurements and studies of secondary electron emission of diamond amplified photo cathode." [Bloomington, Ind.] : Indiana University, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337275.

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Thesis (Ph.D.)--Indiana University, Dept. of Physics, 2008.<br>Title from PDF t.p. (viewed on Jul 29, 2009). Source: Dissertation Abstracts International, Volume: 69-12, Section: B, page: 7588. Adviser: Shyh-Yuan Lee.

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15

Pintao, Carlos Alberto Fonzar. "Novo arranjo para determinar os coeficientes de emissão e a distribuição de energia dos elétrons secundários emitidos por sólidos." Universidade de São Paulo, 1996. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-14112007-091415/.

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Neste trabalho estudou-se um novo arranjo de medida para se obter a distribuição de energia dos elétrons secundários emitidos e os coeficientes de emissão por um sólido. Pelo fato deste arranjo permitir a medida direta do potencial de superfície no caso dos polímeros e da ddp de contato no caso dos metais, foi possível aplicar e descrever teoricamente o método de medida empregado para determinar o espectro energético dos secundários para a platina, Teflon-FEP, Mylar, PVDF- α, PVDF- β e polimero condutor. As cargas acumuladas durante a irradiação dos polímeros foram compensadas atravé

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16

Kite, Jason T. "Secondary Electron Production and Transport Mechanisms By Measurement of Angle-Energy Resolved Cross Sections of Secondary and Backscattered Electron Emission from Gold." DigitalCommons@USU, 2006. https://digitalcommons.usu.edu/etd/2089.

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This work provides information about interactions that produce emitted electrons from polycrystalline Au. Emission energy- angle- dependent electron spectra from a polycrystalline Au surface have been measured at several incident electron beam energies. The range of incident energies (~100 eV to 2500 eV) extends from below the first crossover energy, through Emaxo, to above the second crossover energy. The conventional distinction between secondary electrons (SE) (50 eV) is found to be crude for the investigation of electron yields using these energy- angle- resolved measurements. A more reali

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17

Pigeon, Valentin. "Laser induced fluorescence study of plasma-insulator wall interaction involving secondary electron emission." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0307.

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Dans les propulseurs à effet Hall, l’interaction entre le plasma et les parois en céramique a un impact sur la durée de vie et les performances de ces machines. Ceci est dû en partie à l’émission d’électrons secondaires (EES), capable de refroidir le plasma et peut déclencher de la turbulence et des instabilités. Pour ces raisons, il est nécessaire de comprendre l’interaction plasma-céramique et d’évaluer l’impact de l’EES. Cette étude est destinée principalement à caractériser les gaines plasma faisant face aux céramiques des propulseurs à effet Hall. Celles-ci sont comparées aux gaines d’aut

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18

Cai, Linghui, and 蔡凌辉. "Monte Carlo simulation of positron induced secondary electrons in thincarbon foils." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45460863.

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19

Travia, Anderson Dingfelder Michael. "Interaction cross sections needed for simulation of secondary electron emission spectra from thin metal foils after fast proton impact." [Greenville, N.C.] : East Carolina University, 2009. http://hdl.handle.net/10342/1906.

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Thesis (M.S.)--East Carolina University, 2009.<br>Presented to the faculty of the Department of Physics. Advisor: Michael Dingfelder. Title from PDF t.p. (viewed Apr. 23, 2010). Includes bibliographical references.

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20

Yang, Bin, and 杨彬. "Positron beam study of carbon foil and titanium dioxide nanotubes, andproposing a design of a lifetime positron beam based on secondaryelectrons emission from carbon foil." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B47160287.

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Secondary electron (SE) emission from thin carbon foils induced by 1-20 keV positrons has been investigated over a range of nominal foil thicknesses from 1.0 to 5.0 μg/cm2. The measurement of SEs was carried out in forward geometry using a microchannel plate as a detector. The SE yield γ has been measured as a function of beam energy and compared with some Monte Carlo simulation results. We also present in this thesis the material parameter Λ=? / (dE / dx) and the emitted SE energy spectra. Forincident positron energy of 5 keV or higher, the distribution is found to be characterizedby the Si

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21

Ross, William Charles. "Monte Carlo calculations of inner shell ionization profiles and the secondary electron background in electron spectroscopy." Thesis, University of York, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298446.

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22

Davies, Robert. "An Instrument for Experimental Secondary Electron Emission Investigations, with Application to the Spacecraft Charging Problem." DigitalCommons@USU, 1996. https://digitalcommons.usu.edu/etd/1697.

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Secondary electron emission (SEE) and incident-particle backscattering are important processes accompanying the impact of energetic electrons and ions on surfaces. The phenomena play a key role in the buildup of electrical charge on spacecraft surfaces, and are therefore of particular interest to scientists attempting to model spacecraft charging. In response to a demonstrated need for data, techniques for determining total secondary electron (SE) and backscatter (BS) yields (del) and (neu), and associated scattering-angle-resolved,scattering-energy-resolved, and simultaneous angle-energy-reso

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23

Seymour, D. L. "A secondary electron emission investigation of the initial stages of oxidation of some metal surfaces." Thesis, Keele University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328716.

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24

Ayzatskiy, N., A. Dovbnya, V. Zakutin, et al. "Experimental investigation on the time characteristics of an electron beam formed in the magnetron gun with a secondari-emission cathode." Thesis, Национальный научный центр "Харьковский физико-технический институт" (ННЦ ХФТИ), 2007. http://openarchive.nure.ua/handle/document/9244.

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25

Nickles, Neal E. "The Role of Bandgap in the Secondary Electron Emission of Small Bandgap Semiconductors: Studies of Graphitic Carbon." DigitalCommons@USU, 2002. https://digitalcommons.usu.edu/etd/1696.

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The question of whether the small bandgaps of semiconductors play a significant role in their secondary electron emission properties is investigated by studying evaporated graphitic amorphous carbon, which has a roughly 0.5 eV bandgap, in comparison with microcrystalline graphite, which has zero bandgap. The graphitic amorphous carbon is found to have a 30% increase in its maximum secondary electron yield over that of two microcrystalline graphite samples with comparable secondary electron yields: highly oriented pyrolytic graphite and colloidal graphite. The potentially confounding influence

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26

Takamura, S., S. Mizoshita, and N. Ohno. "Suppression of secondary electron emission from the material surfaces with grazing incident magnetic field in the plasma." American Institute of Physics, 1996. http://hdl.handle.net/2237/6993.

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27

Leiber, Benjamin [Verfasser], and G. [Akademischer Betreuer] Drexlin. "Investigations of background due to secondary electron emission in the KATRIN-experiment / Benjamin Leiber. Betreuer: G. Drexlin." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/1056955848/34.

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28

Costa, i. Bricha Elm. "Computer simulation of a capacitively coupled GEC cell." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368881.

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29

Villemant, Marc. "Modélisation et caractérisation expérimentale de l’influence de l’émission électronique sur le fonctionnement des propulseurs à courant de Hall." Thesis, Toulouse, ISAE, 2018. http://www.theses.fr/2018ESAE0038.

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Les propulseurs plasma à courant de Hall sont aujourd’hui une technologie mature et couramment utilisée dans l’industrie spatiale pour la mise à poste et le contrôle d’orbite de satellites. Malgré cela, la compréhension de la physique régissant le fonctionnement de ces propulseurs et encore lacunaire. Des phénomènes tels que le transport anormal des électrons dans le canal du propulseur ou la dépendance des performances du propulseur au matériau de paroi ne sont pas compris. Par conséquent le développement et la qualification de nouveaux propulseurs passent par de longues études empiriques san

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30

Bieber, Jay A. "Design and Simulation of a Miniature Cylindrical Mirror Auger Electron Energy Analyzer with Secondary Electron Noise Suppression." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7393.

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In the nanoscale metrology industry, there is a need for low-cost instruments, which have the ability to probe the structrure and elemental composition of thin films. This dissertation, describes the research performed to design and simulate a miniature Cylindrical Mirror Analyzer, (CMA), and Auger Electron Spectrometer, (AES). The CMA includes an integrated coaxial thermionic electron source. Electron optics simulations were performed using the Finite Element Method, (FEM), software COMSOL. To address the large Secondary Electron, (SE), noise, inherent in AES spectra, this

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31

Saion, Elias bin. "On microdosimetry of neutrons of selectable energy in mixed (n,y) fields." Thesis, University of St Andrews, 1989. http://hdl.handle.net/10023/2640.

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Biological damage of tissue due to intermediate energy neutrons is generally known to be very important in radiobiology and radiation protection. However, there is no suitable method to determine the quality of these neutrons in particular in the working environment of mixed (n,y) radiation fields. In this thesis, an attempt is made to develop a dosimeter based on microdosimetric principles which has the capability for such a purpose. With this object the basic concepts of microdosimetry are reviewed and discussed with emphasis on their application for radiation protection and in designing of

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32

Tsuchiya, Kenji, Hitoshi Okubo, Tsugunari Ishida, Naoki Hayakawa, and Hiroki Kojima. "Development Process of Impulse Surface Flashover on Alumina Dielectrics in Vacuum." IEEE, 2011. http://hdl.handle.net/2237/20729.

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33

Pierron, Juliette. "Modèle de transport d'électrons à basse énergie (~10 eV- 2 keV) pour applications spatiales (OSMOSEE, GEANT4)." Thesis, Toulouse, ISAE, 2017. http://www.theses.fr/2017ESAE0024/document.

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L’espace est un milieu hostile pour les équipements embarqués à bord des satellites. Les importants flux d’électrons qui les bombardent continuellement peuvent pénétrer à l’intérieur de leurs composants électroniques et engendrer des dysfonctionnements. Leur prise en compte nécessite des outils numériques 3D très performants, tels que des codes de transport d’électrons utilisant la méthode statistique de Monte-Carlo, valides jusqu’à quelques eV. Dans ce contexte, l’ONERA a développé, en partenariat avec le CNES, le code OSMOSEE pour l’aluminium. De son côté, le CEA a développé, pour le siliciu

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Tsuchiya, Kenji, Hitoshi Okubo, Tsugunari Ishida, Hidenori Kato, and Katsumi Kato. "Influence of Surface Charges on Impulse Flashover Characteristics of Alumina Dielectrics in Vacuum." IEEE, 2009. http://hdl.handle.net/2237/14600.

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35

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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36

Oving, Peter Johan. "Etude et réalisation d'un canon à électrons de grande surface à utilisation industrielle." Grenoble 1, 1989. http://www.theses.fr/1989GRE10102.

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Les canons etudies produisent un faisceau d'electrons de 100 a 200 voire 250 kev d'energie. Le faisceau est genere par l'emission d'electrons secondaires lors d'un impact d'ions energetiques sur une cible. L'etude d'un petit canon (section de faisceau: 815 cm) a permis d'ameliorer la conception des canons a electrons a emission secondaire. En parallele, une etude a ete faite sur un banc d'essais de grandes dimensions (section de faisceau: 18155 cm). Les resultats ont montre la possibilite d'un changement d'echelle d'un facteur dix. L'ensemble des resultats a ete utilise pour la fabrication d'u

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BANOUNI, MOSTAFA. "Effets de la topographie de surface induite par impact d'ions lourds sur la spectrometrie d'electrons secondaires resolue angulairement." Toulouse 3, 1986. http://www.theses.fr/1986TOU30135.

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Influence de la topographie de surface induite par bombardement ionique sur l'emission electronique secondaire. Presentation des resultats et description de modeles rendant compte des principeles topographiques observees sur differentes cibles d'aluminium bombardees par des ions argon et xenon de 25 kev

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38

Zhang, Yu, and 張毓. "Investigation of the lifetime spectrum of monoenergetic positrons in silicon involving secondary electrons emission from a carbon foil as start signal, and positron annihilation spectroscopy studies of strontium titante." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/197507.

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A proposed design of the variable energy positron annihilation spectroscopy (VEPALS) system based on secondary electron (SE) emission from a thin carbon foil has been investigated practically. The SE yield and the positron transmission coefficient were investigated as a function of the positron beam energy, the annular electrode potentials, and the column lengths of the annular electrode. The positron lifetime spectra of single crystal p-type silicon(Si) sample under different annular electrode potentials were analyzed. The result gives a supposed annular electrode potential of 1.5 kV. In view

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39

Vidovic, Zvonimir. "Etude la multiplicité de l'émission éléctronique secondaire de cibles minces de carbone sous l'impact d'ions H0, H2+, H3+ et d'ions moléculaires d'énergie de l'ordre du MeV." Phd thesis, Université Claude Bernard - Lyon I, 1997. http://tel.archives-ouvertes.fr/tel-00108534.

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Ce travail experimental est consacre a l'etude de la multiplicite des electrons secondaires emis par des cibles minces de carbone bombardees par des protons, des atomes H0 et des ions moleculaires H2+ et H3+ d'energie variant de 0.25 a 2.2 MeV.<br /><br /> Le phenomene d'emission electronique secondaire par les surfaces des solides a l'impact de projectiles rapides resulte des interactions inelastiques des projectiles avec les electrons du solide. Une description phenomenologique te un rappel des differents modeles theoriques sont rassembles dans un premier chapitre.<br /><br /> Le second chap

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Fearn, Sarah. "A SIMS based bevel-image technique for the analysis of semiconductor materials." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312125.

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Lewis, Christopher James. "Development of a Methodology for Numerical Simulation of a D C ARC Discharge in a Liquid Dielectric." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/2394.

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The majority of literature regarding the numerical simulation of arc discharges in gaseous environments has used a plasma physics approach. Virtually all simulations treat the discharge as an idealized gaseous plasma, which can be described by temperature, pressure, and electric field. This approach can work well if the media is a shielding gas such as Argon; however, the approach does not work well for processes such as underwater welding, EDM, and underwater discharges used to generate high purity particles. The reason these discharges do not have many extensive simulation efforts as describ

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SANTOS, ROBINSON A. dos. "Estudo da influência de impurezas e da qualidade das superfícies em cristais de brometo de tálio para aplicação como um detector de radiação." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26818.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-11-11T13:09:25Z No. of bitstreams: 0<br>Made available in DSpace on 2016-11-11T13:09:25Z (GMT). No. of bitstreams: 0<br>Neste trabalho, cristais de TlBr foram crescidos e purificados pelo método de Bridgman Repetido, a partir de sais comerciais de TlBr, e caracterizados para serem usados como detectores de radiação à temperatura ambiente. Para avaliar a eficiência de purificação, estudos da diminuição da concentração de impurezas foram feitos após cada crescimento, analisando as impurezas traço por Espectrometria de Massas com Plasm

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43

Hueso, González Jaime. "Analysis of wedge-shaped waveguides and design of multipactor-resistant microwave bandpass filters. Análisis de guías de onda en forma de cuña y diseño de filtros de microondas paso-banda resistentes al efecto multipactor." Doctoral thesis, Editorial Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/33750.

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El efecto multipactor de ruptura en RF ha sido objeto de numerosos estudios desde hace más de 80 años, a partir del desarrollo de los primeros aceleradores de partículas en la primera mitad del siglo XX. A mediados de ese siglo, con el desarrollo de fuentes de alta potencia para aplicaciones radar y la llegada de los satélites artificiales, la investigación del multipactor cobró una considerable relevancia, al convertirse este fenómeno en un riesgo determinante para costosos proyectos comerciales. Las guías de onda con secciones rectas canónicas, como las rectangulares o las coaxiales, h

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Fil, Nicolas. "Caractérisation et modélisation des propriétés d’émission électronique sous champ magnétique pour des systèmes RF hautes puissances sujets à l’effet multipactor." Thesis, Toulouse, ISAE, 2017. http://www.theses.fr/2017ESAE0025/document.

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La fusion nucléaire contrôlée par confinement magnétique avec les réacteurs de type Tokamaks et les applications spatiales ont en commun d’utiliser des composants Haute-Fréquence (HF) sous vide à forte puissance. Ces composants peuvent être sujets à l’effet multipactor qui augmente la densité électronique dans le vide au sein des systèmes, ce qui est susceptible d’induire une dégradation des performances des équipements et de détériorer les composants du système. Ces recherches consistent à améliorer la compréhension et la prédiction de ces phénomènes. Dans un premier temps nous avons réalisé

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Kersell, Heath R. "Alternative Excitation Methods in Scanning Tunneling Microscopy." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1449074449.

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Illemann, Jens. "Präzisionsmassebestimmung einzelner Partikel im Femtogrammbereich und Anwendungen in der Oberflächenphysik." Doctoral thesis, Universitätsbibliothek Chemnitz, 2000. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200000677.

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In this work, a new method for mass determination of single low-charged particles in the sub-picogram regime is developed. It opens applications to chemical physics and surface science via determination of growth rates. The method combines the well-known electrodynamic quadrupole ion trap in a UHV-chamber and fourier transformation of scattered light. The achieved mass resolution of down to $10^{-4}$ at 100 fg mass on a time scale of ten seconds allows a resolution of a few percent of the mass of an adsorbed monolayer and to determine growth rates down to one molecule per second on a time scal

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47

Alzaher, Ibrahim. "Les ions émis de la surface : messagers du processus initial de la nano-structuration." Phd thesis, Université de Caen, 2011. http://tel.archives-ouvertes.fr/tel-00637223.

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Lorsqu'un ion projectile inertagit avec une surface, il dépose son énergie tout au long de son trajet. L'énergie déposée conduit à la création d'endommagements et à l'émission de particules secondaires, neutres et chargées. Dans cette thèse, nous avons étudié l'endommagement de surfaces cristallines induit par irradiation aux ions lents et rapides. Nous avons également étudié la pulvérisation d'ions secondaires durant l'irradiation aux ions rapides. Dans le cas d'irradiation aux ions lents multichargés, nous avons déterminé les sections efficaces d'endommagement par ion incident sur les surfac

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48

Rigoudy, Charles. "Couches minces diélectriques avec des inclusions de nanoparticules d'argent réalisées par voie plasma conçues pour le contrôle du gradient de charges électriques sous irradiation électronique pour des applications spatiales." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30268.

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Le phénomène d'émission électronique est étudié dans de nombreux domaines fondamentaux de la physique et pose le principe de fonctionnement d'un grand nombre de dispositifs tels que les écrans à émission de champ, les propulseurs Hall, etc. Il est mieux compris pour les métaux. Cependant pour les matériaux isolants, il constitue un phénomène critique limitant la fiabilité des composants dans les applications spatiales où les phénomènes de décharge et de claquage sont entièrement contrôlés par l'émission électronique. Selon l'énergie des électrons incidents et les propriétés des diélectriques,

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Giesen, Gaelle. "Dark Matter Indirect Detection with charged cosmic rays." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112160/document.

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Les preuves pour l'existence de la matière noire (MN), sous forme d'une particule inconnue qui rempli les halos galactiques, sont issues d'observations astrophysiques et cosmologiques: son effet gravitationnel est visible dans les rotations des galaxies, des amas de galaxies et dans la formation des grandes structures de l'univers. Une manifestation non-gravitationnelle de sa présence n'a pas encore été découverte. L'une des techniques les plus prometteuse est la détection indirecte de la MN, consistant à identifier des excès dans les flux de rayons cosmiques pouvant provenir de l'annihilation

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Chiang, Chang-Lin, and 江昌霖. "Electro-optical conversion and secondary electron emission in flat electron emission lamp by optical emission spectra." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/12845752039510786501.

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博士<br>國立交通大學<br>電子物理系所<br>104<br>Flat Electron Emission Lamp (FEEL) is a newly developed type of uniform planar light source, featuring unique advantages of double-side lighting, transparency, and heat insulation over the conventional lighting sources. The working principle of FEEL utilizes electrons accelerated by external electric field to excite the phosphor powders coated on the anode to obtain desired luminescence. The abovementioned electrons can be generated from two different sources: the free electrons originated from gas ionization and the secondary electrons generated from the bomba

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