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Dissertations / Theses on the topic 'Optical emission spectroscopy'

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1

Chen, Linghao. "Surface layer evolution in glow discharge optical emission spectroscopy." Thesis, Sheffield Hallam University, 2005. http://shura.shu.ac.uk/19452/.

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Glow discharge optical emission spectroscopy (GDOES) is a modem analytical technique for the analysis of the chemical composition of bulk materials and the depth profiling of multi-layer structures. Most research in the use of GDOES has concentrated on developing accurate methodologies for quantitative analysis and depth profiling. However, this thesis presents a study on various aspects of surface layer evolution under argon ion etching in GDOES. The GDOES technique relies on the ion bombardment of sample surfaces which removes material from the surface, layer by layer, on the atomic scale. D
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2

Faske, Arthur Joseph. "A novel sample introduction device for inductively coupled plasma-optical emission spectrometry." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/27366.

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3

Xie, Xing. "Optical properties of ZnO thin film : raman spectroscopy, optical reflection, photoluminescence and stimulated emission /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202005%20XIE.

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4

Rizvi, Syed Shabbar Abbas. "Inductively coupled Ar/Clâ‚‚ plasma etching of GaN." Thesis, University of Ulster, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288895.

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5

Miles, Jared A. "Determining Metastable Densities in an Argon Discharge Through Optical Emission Spectroscopy." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1278679233.

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6

Hettipathirana, Terrance Dayakantha. "Effects of organic acids in inductively coupled plasma optical emission spectroscopy." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27475.

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The effects of organic acids in an inductively coupled plasma (ICP) have been studied with reference to solvent introduction and plasma excitation conditions. When compared with water, an increase in emission intensity for Mg, Cd, and Zn atom and ion lines is observed when organic acids are present in the sample solution. The presence of organic acids causes an increase in both the efficiency of nebulization and the temperature in the lower region of the central aerosol channel. The feasibility of using a semi-automated flow injection (FI) method to investigate the interference effects of ace
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7

Wirsz, Douglas Franklin. "Applications of multivariate methods to inductively coupled plasma optical emmission spectra." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25070.

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The utility of multivariate analysis methods for the qualitative and quantitative analysis of complex ICP optical emission spectra is shown. A photodiode array is used to collect data which are simplified to a low resolution (approx. 4 A) spectrum for a number of knowns and unknowns. The digitized spectra thus obtained are plotted as points in multivariate space (pattern space). The spectra of different elements appear in well defined regions of pattern space. Qualitative analysis is accomplished by methods of cluster analysis and factor analysis. Quantitative analysis is carried out using mul
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8

Motaung, David Edmond. "Optical emission spectroscopy of laser induced plasmas containing carbon and transitional metals." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8844_1260782486.

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<p>The spectroscopic, SEM and Raman measurements on carbon nanotubes under the exact conditions of which OES analysis were made showed that at<br /> a pressure of 400 Torr and a flow rate of 200 sccm, the quality and quantity of single-walled carbon nanotubes was the highest.</p>
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9

Gray, Alison Ruth. "Geochemical analysis by inductively-coupled plasma optical emission spectroscopy using slurry atomization." Thesis, University of Plymouth, 1985. http://hdl.handle.net/10026.1/1677.

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10

Hao, Liu. "Pulsed laser ablation and laser-induced plasma diagnosis by optical emission spectroscopy." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702119.

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Fundamental aspects of the laser ablation of solid targets using nanosecond pulses with irradiances in the range ≈ 1-30 OW /cm2 have been investigated theoretically, modelled using a simulation code, and explored experimentally by time-gated, spatially and spectrally resolved imaging of the optical emission that accompanies the ablation plume. During the earliest stages of the laser-target interaction, the target surface temperature rises rapidly and electrons are ejected by both thermionic and photo-emission. These electrons absorb energy from the · laser pulse by strong electron-photon coupl
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11

Ishikawa, T., D. Hayashi, K. Sasaki, and K. Kadota. "Determination of negative ion density with optical emission spectroscopy in oxygen afterglow plasmas." American Institute of Physics, 1998. http://hdl.handle.net/2237/7091.

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12

Mäkinen, A. (Ari ). "Experimental spectroscopic studies of metals with electron, ion, and optical techniques." Doctoral thesis, University of Oulu, 2014. http://urn.fi/urn:isbn:9789526203149.

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Abstract In this thesis, different spectroscopic methods are used for studying metals. Electron spectroscopy is applied for the study of binding energy shifts between atomic vapor and solid metals. Photoionization and Auger decay of high temperature aluminum vapors are investigated. Ionization of atomic chromium metal vapor by light absorption is studied with synchrotron radiation and time-of-flight ion mass spectroscopy. Optical spectroscopy is used for studying light emission from electric arc furnace plasma in experimental apparatuses developed during this work. Experimental techniques and
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13

Mäkinen, A. (Ari). "Experimental spectroscopic studies of metals with electron, ion, and optical techniques." Doctoral thesis, University of Oulu, 2014. http://urn.fi/urn:isbn:9789526203140.

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Abstract In this thesis, different spectroscopic methods are used for studying metals. Electron spectroscopy is applied for the study of binding energy shifts between atomic vapor and solid metals. Photoionization and Auger decay of high temperature aluminum vapors are investigated. Ionization of atomic chromium metal vapor by light absorption is studied with synchrotron radiation and time-of-flight ion mass spectroscopy. Optical spectroscopy is used for studying light emission from electric arc furnace plasma in experimental apparatuses developed during this work. Experimental techniques and
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14

Wagner, Janet. "Influence of operating parameters on aerosol characteristics of selected inductively coupled plasma optical emission spectrometry nebulizers." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/25973.

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15

Humphrey, Andrew James. "Quantitative spectroscopy of the ultraviolet and optical emission lines from high redshift radio galaxies." Thesis, University of Hertfordshire, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421273.

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16

Pottinger, Sabrina. "Investigation of steady state characteristics of hollow cathode internal plasmas using optical emission spectroscopy." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/345074/.

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17

Schubert, C., V. Hoffmann, A. Kümmel, et al. "Compositional depth profiling of diamond-like carbon layers by glow discharge optical emission spectroscopy." Royal Society of Chemistry, 2016. https://tud.qucosa.de/id/qucosa%3A36071.

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This article describes the compositional depth profiling (CDP) of diamond-like carbon (DLC) layers by Glow Discharge-Optical Emission Spectrometry (GD-OES). The DLC layers were deposited on flat steel samples. Analysis by using a Charge Coupled Device (CCD) GD-OES instrument revealed saturation effects of the carbon lines at 156 nm and 165 nm. Therefore, the application of these lines for CDP of DLC layers is not possible. A third line at 193 nm was not affected by this saturation effect and is therefore a good choice for calibration. A second effect was observed as a non-flat crater in combin
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18

Anooshehpour, Farid. "Optical emission spectroscopy as a process-monitoring tool in PECVD of amorphous carbon coatings." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27142.

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Dans ce projet de recherche, le dépôt des couches minces de carbone amorphe (généralement connu sous le nom de DLC pour Diamond-Like Carbon en anglais) par un procédé de dépôt chimique en phase vapeur assisté par plasma (ou PECVD pour Plasma Enhanced Chemical Vapor deposition en anglais) a été étudié en utilisant la Spectroscopie d’Émission Optique (OES) et l’analyse partielle par régression des moindres carrés (PLSR). L’objectif de ce mémoire est d’établir un modèle statistique pour prévoir les propriétés des revêtements DLC selon les paramètres du procédé de déposition ou selon les données a
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19

Ampratwum, Cecilia S. "Identification of chemical species using artificial intelligence to interpret optical emission spectra." Thesis, University of Northampton, 1999. http://nectar.northampton.ac.uk/3004/.

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The nonlinear modeling capabilities of artificial neural networks (ANN’s) are renowned in the field of artificial intelligence (Al) for capturing knowledge that can be very difficult to understand otherwise. Their ability to be trained on representative data within a particular problem domain and generalise over a set of data make them efficient predictive models. One problem domain that contains complex data that would benefit from the predictive capabilities of ANN’s is that of optical emission spectra (OES). OES is an important diagnostic for monitoring plasma species within plasma processi
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20

Nawarange, Amruta V. "Optical Emission Spectroscopy during Sputter Deposition of CdTe Solar Cells and CuTe-Based Back Contacts." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1321656598.

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21

Loubser, Susan Ilani. "Analysis and interpretation of astrophysical optical emission-line spectra / Susan Ilani Loubser." Thesis, North-West University, 2005. http://hdl.handle.net/10394/84.

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This study consists of a quantitative optical emission-line analysis of spectra from five blue compact galaxies (Zw 0855, Mrk 1267, II Zw 33, Tol 2 & Tol 3), as well as a qualitative analysis of spectra from two galactic H II regions (NGC 3603 & NGC 3576). It serves a two-fold purpose: first, to understand the CCD reduction, spectra extraction and different nebular analysis methods, together with their applications and limitations, preparatory to studies using the Southern African Large Telescope (SALT) and second, to extend current star formation related research to include extragalactic star
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22

Kesseng, Karl Patrick. "Utilisation de l'interférométrie optique et de la spectroscopie optique d'émission pour étudier un mélange gazeux Argon/CO2 à haute température." Thesis, Orléans, 2010. http://www.theses.fr/2010ORLE2084.

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Le présent travail de thèse a consisté en un diagnostic d’une colonne de plasma d’un mélange d’argon et de CO2, créée par une décharge éclatant dans un réacteur cylindrique, entre deux électrodes pointues en tungstène, sous une tension d’amorçage de 10KV, un courant de 100 à 300mA, et à pression atmosphérique. Le diagnostic du plasma a été réalisé à l’aide d’un laser Hélium Néon (raie 632.8nm), d'un interféromètre de Mach-Zehnder et d’un spectromètre à fibre optique. Après calcul de la composition du mélange d’Argon et de CO2 en fonction de la température par la méthode de minimisation de l’en
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23

Ifezue, David I. "Quantitative Analysis of Anodic Oxide Films by Radio Frequency Glow Discharge Optical Emission Spectroscopy (Rf-Gdoes)." Thesis, University of Manchester, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508900.

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24

Hollingworth, Andrew Roy. "Semiconductor optoelectronic infrared spectroscopy." Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/842674/.

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We use spectroscopy to study infrared optoelectronic inter and intraband semiconductor carrier dynamics. The overall aim of this thesis was to study both III-V and Pb chalcogenide material systems in order to show their future potential use in infrared emitters. The effects of bandstructure engineering have been studied in the output characteristics of mid-IR III-V laser diodes to show which processes (defects, radiative, Auger and phonon) dominate and whether non-radiative processes can be suppressed. A new three-beam pump probe experiment was used to investigate interband recombination direc
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25

Hviding, Raphael E., Ryan C. Hickox, Kevin N. Hainline, et al. "Characterizing the WISE-selected heavily obscured quasar population with optical spectroscopy from the Southern African Large Telescope." OXFORD UNIV PRESS, 2018. http://hdl.handle.net/10150/627140.

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We present the results of an optical spectroscopic survey of 46 heavily obscured quasar candidates. Objects are selected using their mid-infrared (mid-IR) colours and magnitudes from the Wide-Field Infrared Survey Explorer (WISE) anzd their optical magnitudes from the Sloan Digital Sky Survey. Candidate Active Galactic Nuclei (AGNs) are selected to have mid-IR colours indicative of quasar activity and lie in a region of mid-IR colour space outside previously published X-ray based selection regions. We obtain optical spectra for our sample using the Robert Stobie Spectrograph on the Southern Af
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26

Abdul, Hadi Zeinab. "Terahertz emission spectroscopy of multiferroic bismuth ferrite : insights into ultrafast currents and phonon dynamics." Electronic Thesis or Diss., Le Mans, 2024. http://www.theses.fr/2024LEMA1030.

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La technologie térahertz (THz) a suscité un intérêt significatif dans la communauté scientifique en raison de sa position unique dans le spectre électromagnétique, complétant le gap entre les régions des micro-ondes et de l'infrarouge. Cette radiation est non ionisante et peut pénétrer divers matériaux sans les endommager, ce qui la rend très attirante pour de nombreuses applications potentielles. Les avancées récentes dans la technologie des lasers ultra-rapides ont élargi l'exploration du rayonnement THz à un large éventail de technologies passionnantes. Elle est désormais utilisée dans des
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27

Girardello, Carlo. "Optical Analysis of Plasma : Flame Emission in Cryogenic Rocket Engines." Thesis, Luleå tekniska universitet, Rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76097.

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This thesis contains the results of optical flame emission measurements of the Vulcain 2.1engine and the plasma emission spectroscopy of the Lumen Project engine. The plume spectroscopyis analyzed, ordered and studied in detail to offer the best possible molecular composition.The main focus relied on the hydroxide radical, blue radiation and other moleculesanalysis of the intensities encountered during the tests. The plasma emission spectroscopy isfocused on the determination of the plasma temperature value in LIBS measurements. Thehydrogen plasma temperature determination of the local thermod
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28

Alavi, Eshkaftaki Seyed Khalil [Verfasser]. "Optical spectroscopy and applications of atomically precise graphene nanoribbons: from light emission to photodetection / Seyed Khalil Alavi Eshkaftaki." Bonn : Universitäts- und Landesbibliothek Bonn, 2020. http://d-nb.info/1224270320/34.

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29

Kabeláčová, Kateřina. "Diagnostika dohasínajícího dusíkového plazmatu metodou optické emisní spektroskopie." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-316179.

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The aim of this thesis is diagnose post-discharge nitrogen plasma with optical emission spectroscopy. There is long interest of investigated of nitrogen post-discharge plasma and study how to use it in theory as well as in practice. All results were measured with method of optical emission spectroscopy of post-discharge plasma. Discharge was generated by direct-current voltage generator with flowing regime. In this thesis was used for different series of experiments. First experiment was performed with adding water vapour into argon plasma. Measuring was processed at constant current 140 mA, v
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30

Derom, Stephane. "Plasmonic cavities and optical nanosources." Thesis, Dijon, 2013. http://www.theses.fr/2013DIJOS060/document.

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Les microcavités optiques présentent de hauts facteurs de qualité, c'est pourquoi ces systèmes sont d'un grand intérêt pour la conception de lasers à bas seuil, ou encore, pour l'étude du régime de couplage fort. En revanche, ces systèmes sont soumis à la limite de diffraction de la lumière, et donc les modes qu'ils supportent ont une extension spatiale ne pouvant être en deçà de l'échelle de la longueur d'onde. Dans ce manuscrit de thèse, nous nous intéressons aux systèmes plasmoniques parce qu'ils supportent des modes confinés à l'échelle nanométrique. En premier lieu, nous étudions une micr
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31

Picardi, Gennaro. "Raman spectroscopy and light emission at metal surfaces enhanced by the optical near field of a scanning tunneling tip." [S.l. : s.n.], 2003. http://www.diss.fu-berlin.de/2003/191/index.html.

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32

Keilty, Garry William. "Quantitative analysis of major and trace elements in ceramic materials using laser ablation inductively-coupled-plasma optical emission spectroscopy." Thesis, Keele University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401116.

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33

Ghanbari, Niloofar [Verfasser]. "Analysis of film formation in graphite electrode of Li-ion cells using glow discharge optical emission spectroscopy / Niloofar Ghanbari." Ulm : Universität Ulm, 2019. http://d-nb.info/1190727331/34.

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34

SILVA, CARLOS E. da. "Validacao de metodos para as tecnicas de WDXRF e OES-SPARK na analise de acos. Calculo de incerteza de medicao para amostras de process, aco classe API." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9361.

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Made available in DSpace on 2014-10-09T12:26:15Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:10:32Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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35

Wagner, Rebecca. "Local Structural and Optical Characterization of Photonic Crystals by Back Focal Plane Imaging and Spectroscopy." Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-164382.

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This thesis establishes methods to locally and effciently detect the fluorescence from photonic crystals (PCs) in dependence on wavelength and direction. These are applied to three dimensional (3D) PCs grown by vertical deposition of polystyrene beads. The experiments allow conclusions about the local 3D structure of a sample, about defects in its volume and about spatial structural variations. They thus provide more information than typical spectroscopy measurements that average over large areas and methods that only image the surface structure like scanning electron microscopy. A focused las
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36

CADELANO, MICHELE. "Absorption and emission processes in organometal trihalide perovskites." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266671.

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Among the various solution processed semiconductors, organometal halide perovskites represent a noteworthy class of materials thanks to their unique combination of optoelectronic properties: efficient charge transport, favorable emission properties, strong light absorption and optical gap tunability stand for the key features of these novel semiconductors and make them appealing for the realization of a new generation of low-cost solar cells and optical emitters. Recently, scientists have devoted large efforts to study perovskites as absorbers in solar cells, reaching energy conversion efficie
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37

Ben, Slimane Tarek. "Investigation of the Optical Emission of Hall Effect Thrusters using a Collisional Radiative Model, Particle-In-Cell Simulations, and Machine Learning." Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAX153.

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Ce travail propose une analyse de l'émission optique des propulseurs à effet Hall qui repose sur les simulations, la spectroscopie et les réseaux de neurones. L'étude s’ancre dans le contexte dynamique du New Space et des lanceurs réutilisables qui ont amené une réduction considérable des coûts des opérations spatiales. Ce changement a intensifié la demande pour des équipements de satellites standardisés et miniaturisés, avec un intérêt particulier pour les propulseurs à effet Hall en raison de leur rapport poussée-puissance avantageux, de leur impulsion spécifique et de leur efficacité.Cette
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Gonzaga, Fabiano Barbieri. "Desenvolvimento de um espectometro de emissão para a região do infravermelho proximo." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249970.

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Orientador: Celio Pasquini<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-06T01:48:01Z (GMT). No. of bitstreams: 1 Gonzaga_FabianoBarbieri_D.pdf: 2179229 bytes, checksum: 3032668f50c4141f4589cdc9b2ceda23 (MD5) Previous issue date: 2006<br>Doutorado<br>Quimica Analitica<br>Doutor em Ciências
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Flamíková, Kristýna. "Diagnostika depozice tenkých vrstev připravovaných z tetravinylsilanu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-216673.

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The aim of this work is plasma diagnostic during the deposition of thin films based on organosilicone compounds. These layers have a wide range of applications mainly as protective coatings or intermediate phase in composites reinforced by glass fibers. The theoretical part of this work gives a basic fundaments of optical emission spectroscopy and mass spectroscopy and describes procedures for rotational, vibrational, and electron temperature calculations. The RF capacitive coupled discharge in configuration with planar electrodes was used with tetravinylsilane (TVS) organosilicone monomer in
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40

Lam, Derrick Chuk-Wung. "Design of Optical Measurements for Plasma Actuators for the Validation of Quiescent and Flow Control Simulations." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/64510.

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The concept of plasma flow control is a relatively new idea based on using atmospheric plasma placed near the edge of an air foil to reduce boundary layer losses. As with any new concept, it is important to be able to quantify theoretical assumptions with known experimental results for validation. Currently there are a variety of experiments being done to better understand plasma flow control, but one particular experiment is through the use of multi-physics modeling of dielectric barrier discharge actuators. The research in this thesis uses optical measurement techniques to validate computati
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41

Zemánek, Nikola. "Studium plazmochemické redukce korozních vrstev na bronzi." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216410.

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The application of low-pressure low-temperature hydrogen plasma on artificial corrosion layers on bronze has been studied. For this purpose, three sets of bronze corroded samples were prepared. The first step of the model sample preparation was grinding of the bronze surface by using emery with 60, then 280 and finally by 600 grains density, in order to achieve the defined surface roughness. The next step of the work were optical and scanning electron microscopy observations with energy dispersive X-ray micro analysis (SEM-EDX) of the prepared bronze sample for purpose of surface structure cha
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42

Bocková, Ivana. "Vliv atomů kovů na dohasínající dusíkové plazma." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-216674.

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The aim of this master thesis is to study the influence of metallic atoms on nitrogen post-discharge. Pure nitrogen post-discharge is a subject study of many works dealing with kinetic processes in plasma. Unfortunately, there are only a few published works that present influence of various traces on nitrogen post-discharge kinetics. This master thesis deals with problems of nitrogen post-discharge containing mercury traces. All experimental data were obtained using optical emission spectroscopy of a DC discharge in a flowing mode, which can achieve appropriate temporal resolution in the order
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43

O'Neil, Kevin Andrew. "An Investigation of the Adsorption Behavior between Silver Nanoparticles (AgNPs) and Corundum (a-AL2O3) at Environmental pH Values using Inductively-coupled Plasma Optical Emission Spectroscopy (ICP-OES) and Raman Spectroscopy." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1471615515.

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44

Siepa, Sarah Luisa [Verfasser], Achim von [Gutachter] Keudell, and Peter [Gutachter] Awakowicz. "Global collisional-radiative model for optical emission spectroscopy of argon and argon-containing plasmas / Sarah Luisa Siepa ; Gutachter: Achim von Keudell, Peter Awakowicz." Bochum : Ruhr-Universität Bochum, 2017. http://d-nb.info/113883548X/34.

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45

Věrná, Jana. "Studium rozkladu těkavých uhlovodíků v nerovnovážném plazmatu povrchového výboje za atmosférického tlaku." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216394.

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The main goal of this thesis was to study plasma generated by surface discharge and its application in volatile organic compound destruction. Introduction of this thesis deals with the issue of volatile organic compound. The term of volatile organic compound was defined and explained. Summary of the most important sources of volatile organic compound emissions and possible technics for their elimination was presented. This thesis drew attention on negative aspects of volatile organic compounds on human organism and on the whole environment. The problems of surface discharge and its possible ap
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46

Pěček, Dominik. "Určení rozložení teploty oblouku v reálném jističi." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-317074.

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This master thesis deals with determination of temperature field in a real circuit breaker. This issue is solved by analysis of measured emission spectra at selected points of the circuit breaker. Spectral line ratios and Boltzmann plot are used for calculation of temperature. These methods are based on elemental analysis of plasma. The main result is finding significant changing of chemical composition of plasma beyond determination of temperature field.
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47

Blahová, Lucie. "Plazmochemická příprava a charakterizace tenkých vrstev na bázi hexamethyldisiloxanu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216917.

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Thin films have been used to modify surface properties of various materials for many years. Plasma Enhanced Chemical Vapor Deposition (PECVD) is one of the possible methods for their preparation and this technique is applied in this work as well. An organosilicone – hexamethyldisiloxane – is used as precursor. Thin films are created on the surface of the substrate using mixture of precursor and oxygen in radiofrequently excited capacitively coupled plasma. The aim of the thesis is to find the optimal deposition conditions for production of transparent thin layers with good barrier capabilities
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48

Panov, Nikita. "Microwave-Assisted Solvothermal Synthesis and Optical Characterization of M(RE)F4 (M – Alkali Metal; RE – Rare-Earth Metal) Nano- and Microscale Particles." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40590.

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Interest in rare-earth-doped crystalline materials, e.g., M(RE)F4 (M – alkali metal, RE – rare-earth metal), featuring unique optical properties such as light upconversion and downshifting is experiencing a surge due to the broad spectrum of applications that these photonic systems are facilitating. The development of reliable synthetic methods that grant rapid access to these materials is therefore of great importance. Microwave-assisted synthesis is appealing in this regard, because microwave radiation enables rapid and uniform heating of the reaction mixture and allows for rigid control of
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49

Derom, Stéphane. "Plasmonic cavities and optical nanosources." Phd thesis, Université de Bourgogne, 2013. http://tel.archives-ouvertes.fr/tel-01005260.

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Optical microcavities exhibit high resonance quality, so that, they are of key interest for the design of low-threshold lasers or for achieving strong coupling regime. But, such systems support modes whose the volume remain diffraction limited.In this manuscript, we are interested in their plasmonic counterparts because they support confined modes at the sub-wavelength scale. First, we study an in-plane plasmonic cavity which is the transposition of 1D optical cavity to surface wave. We characterize the cavity by measuring the fluorescence lifetime of dye molecules deposited inside.Then, we ar
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50

Šimšová, Tereza. "Studium plazmochemické redukce korozních vrstev na mědi." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216405.

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The present diploma thesis concerns the research of plasmachemical reduction of copper corrosion layers. The process was based on using low pressure hydrogen RF plasma in which copper samples are treated for several hours. Four series of copper corrosion layers were prepared in four different corrosion atmospheres. The first two were prepared using saturated vapors of HCl and ammonium acetate that affected copper samples for one week. The second two sets were prepared by samples dipping in HNO3 and H2SO4. EDX analysis confirms visual composition of corrosion layers – chlorides, nitrides and su
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