Tesis sobre el tema "Argon"
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Weirich, John R. "Improvements to Argon-Argon Dating of Extraterrestrial Materials". Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/145293.
Texto completoHarwardt, Heike. "Behandlung von PP- und PET-Substraten im Argon- und Methan/Argon-Plasma". [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=983031045.
Texto completoEdmunds, P. D. "Trapping ultracold argon atoms". Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1462806/.
Texto completoGrigonis, A., L. Marcinauskas, M. Carnauskas y R. Kaliasas. "Graphite Nanostructures Produce in the Acetylene, Argon-Acetylene and Argon-Hydrogen-Acetylene Plasmas". Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35388.
Texto completoVelazquez, Maria Guadalupe Neira. "Argon plasma treatment of polymers". Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274978.
Texto completoChetty, Dashavir. "Strong-field excitation of argon". Thesis, Griffith University, 2021. http://hdl.handle.net/10072/402734.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
Al-Dabbagh, Abdula Nazar. "Charge Mobility in Liquid Argon". Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/318805.
Texto completoHarrington, Kathleen M. "Simulated liquid argon interactions with neutrons". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78513.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (p. 77-78).
The GEANT4 physics simulation program is known to have errors in how hadronic interactions are implemented. This has the potential to cause errors in the Monte Carlos used to determine the expected neutron backgrounds in the MiniCLEAN single phase liquid argon WIMP detector. Elastic and inelastic collisions between neutrons and argon nuclei as well as neutron captures were simulated independently in order to characterize the accuracy of the implementation by GEANT4.9.3.pOl and GEANT4.9.5. The effective cross sections, angular distributions, photons, decay schemes, energy conservation, and momentum conservation were determined through analysis of the neutron tracks created by GEANT4. A large proportion of the interactions behave as expected, however energy and momentum are not conserved by varying degrees of severity with some GEANT4.9.3.pOl inelastic collisions resulting in over twice the correct amount of energy.
by Kathleen M. Harrington.
S.B.
Taillandier-Loize, Thierry. "Jet lent d’atomes d’argon métastables pour l’étude de l’échange de métastabilité, des interactions de van der Waals et des milieux d’indice négatif". Thesis, Paris 13, 2014. http://www.theses.fr/2014PA132039/document.
Texto completoThe topic of this thesis concerns the manipulation of a metastable argon (Ar* ³p2) atomic beam in different configurations. Firstly, I present the metastability exchange between an atom in fundamental state and an excited atom at low center of mass energy (between 4 and 9 meV). I also propose theoretical interpretation by a semi-classical approach (JWKB approximation) which is validated, in this field of energies, compared to the exact solution of the Schrödinger radial equation with potentials involved in collision. The absolute exchange cross-sections, derived from a time of flight analysis of metastable signal, enable an unbiased comparison with theoretical predictions. The characteristics of a Zeeman slowedbeam are degraded by the process of slowing down and makes it difficult to use below a few tens of meters per second. Secondly, I present the realization of an original slow beam from a magneto-optical trap and having outstanding features. The atomic velocity is tunable between 10 and 100 m/s, the relative velocity dispersion is very low (6 % at 20 m/s) and the flow is substantial, (4.7×108 Ar*/s/sr), for a standard angular aperture (35 mrad FWHM). This new device can present some issues in atomic interferometry and atomic optics such as van der Waals atom-surface interactions or study co-moving potentials and their applications in negative-index media for matter wave or slowers
Fladerer, Alexander. "Keimbildung und Tröpfchenwachstum in übersättigtem Argon-Dampf Konstruktion einer kryogenen Nukleationspulskammer /". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965487814.
Texto completoLEFEVRE, JEAN-CLAUDE. "Iphygenie : instrument physique pour la geochronologie d'echantillons naturels et irradies. developpement industriel d'une installation pour la mesure potassium-argon (technique cassignol) et pour la mesure argon 39/argon 40". Paris 11, 1992. http://www.theses.fr/1992PA112452.
Texto completoHanna, Gabriel Joseph. "Confocal microscopy of fluid argon under pressure". Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Fall2009/g_hanna_121109.pdf.
Texto completoBoulharts, Abderrahmane. "Étude de la synchronisation en phase, par injection, de deux lasers à argon ionisé (Ar⁺)". Paris 11, 1987. http://www.theses.fr/1987PA112408.
Texto completoArfaoui, Samir. "Système haute-tension du calorimètre à argon liquide du détecteur ATLAS : mise en oeuvre, optimisation, et mesure de luminosité du LHC". Thesis, Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX22081/document.
Texto completoThe main goals of the ATLAS scientific programme are the observation or exclusion of physics beyond the Standard Model (SM), as well as the measurement of production cross-sections of SM processes. As the rate of events N of a given physics process is linked to the cross-section through the luminosity, it is important to measure the luminosity with great precision. The ATLAS experiment has two major luminosity monitors, LUCID (Luminosity measurement Using Cerenkov Integrating Detector), which consists of Cerenkov tubes located around the beam axis 17m away from the interaction point, and BCM (Beam Condition Monitor) which is a diamond-based detector and has both beam-abort and luminosity capabilities. As these detectors provide a relative luminosity measurement, they were absolutely calibrated in 2010 using the van der Meer procedure, achieving a total systematic uncertainty of 3.4%. The ultimate plan is to provide an absolute calibration using the ALFA detector during a run with special beam optics. In order to provide more cross-checks and a better control on the systematic uncertainties, other luminosity handles are always needed. In particular, an independent measurement using the liquid argon forward calorimeter (FCal), based on the readout current of its high-voltage system, has been developed. This document presents the commissioning and operations of the ATLAS liquid argon calorimeter high-voltage system, as well as its usage to perform a luminosity determination. Analysis of the high-voltage currents during LHC collisions and comparisons with other luminosity detectors have led to a calibration of these currents with a precision better than 0.5%
Thompson, C. E. "Thomson scattering measurements in low temperature plasmas". Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269139.
Texto completoIzarra, Charles de. "Contribution à l'étude de colonnes de plasma d'argon dans un domaine étendu de températures (2000 k ; 14000 k)". Orléans, 1988. http://www.theses.fr/1988ORLE2023.
Texto completoEberenz, Katharina. "argon daisy edition – DAISY in the commercial book-trade in Germany". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-67974.
Texto completoDagtekin, Ebru. "Measurement Of Nonuniform Magnetized Argon Plasma Discharge Parameters". Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607934/index.pdf.
Texto completos a magnetic field of sufficient strength Schottky&rsquo
s theory of ambipolar diffusion applies.
Bougerolle, Stephen Edward. "Cosmic ray tests of a liquid argon calorimeter". Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27397.
Texto completoScience, Faculty of
Physics and Astronomy, Department of
Graduate
Nammour, Samir. "Effet du laser à argon sur l'émail dentaire". Doctoral thesis, Universite Libre de Bruxelles, 1988. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/241284.
Texto completoIngram, S. G. "Investigations of low pressure RF discharges in argon". Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.480534.
Texto completoLamade, John Dietrick. "Investigation of an argon-filled, thermoacoustic prime mover". Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28308.
Texto completoSurrey, E. "Fundamental properties of a microwave induced argon plasma". Thesis, London Metropolitan University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376458.
Texto completoHamilton, Philip. "A study of neutrino interactions in argon gas". Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/26933.
Texto completoWeldon, Nicholas Cullum. "Argon Diffusion in Rhyolite Melt at 100 MPa". Thesis, University of California, Davis, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10165710.
Texto completoIn this study, we conduct high-pressure (HP) high-temperature (HT) diffusion experiments in anhydrous rhyolite near 1000 °C and 1100 °C at 100 MPa using the cold seal pressure apparatus to diffuse argon into natural obsidian charges. We use electron microprobe measurements of the argon concentration gradients to calculate the argon diffusivity (DAr) as a function of temperature and pressure. The range and mean of DAr calculated from these measurements are in good agreement with previous studies (Carroll 1991, Behrens and Zhang 2001). Even so, we observe significant variability in our DAr results, beyond what is likely due to analytical or experimental uncertainty; nearly as much variability as Carroll (1991) and Behrens and Zhang (2001) reported. In particular, we notice a small systematic geometric bias in the distribution of argon in our samples, which appears to correlate with sample deformation. We attribute this effect to distortion of concentration gradients by viscous advection.
Avila, Carlos A. "Laser cooling of a metastable argon atomic beam". FIU Digital Commons, 1996. http://digitalcommons.fiu.edu/etd/1342.
Texto completoRosqvist, Emil y Theodore Vassi. "Characterization of phases in Argon Oxygen Decarburization slag". Thesis, KTH, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298409.
Texto completoSlagg är en viktig del av ståltillverkning med AOD-processen (Argon Oxygen Decarburization). Fokus i detta arbete var att utveckla en metod för att karakterisera faser i slaggprover erhållna efter avkolning, reduktion och avsvavling. Sex prover från två batcher (batch A och B) förbereddes genom bakning i bakelit och polering. Dessa prover analyserades i SEM (Svepelektronmikroskop), med BSE (Backscattered Electrons) och EDS (Energy Dispersive Xray Spectroscopy). Bilder från BSE bearbetades sedan i ImageJ med en denoise-metod för avancerad fraktionsanalys. Genomsnittlig sammansättning för varje fas analyserad med EDS presenteras i elementtabeller. En systematisk undersökning av heterogenitet hos slagg utfördes på prover från batch B. Detta gav en mer noggrann komposition och fraktionsanalys. På grund av slaggens karaktär uppkom ofta repor under poleringen. Den negativa effekten av dessa repor kunde minskas med denoise-metoden i fraktionsanalysen. Det finns tre huvudfaser i varje steg i AOD-processen med liknande sammansättning och struktur för de två batcherna. Resultaten visade betydelsen av att mäta slaggprovet i olika zoner på grund av dess heterogenitet. Mer specifikt krävdes minst fyra slumpmässiga bilder från tvärsnittet för noggrann fraktionsanalys av prover efter avkolning. Sammantaget var metoden för karaterisering av slagger tillräcklig för prover efter avkolning och avsvavling.
McWilliams, Cory K. "The tectonic evolution of the Connecticut Valley Synclinorium constraints from argon/argon thermo chronology, uranium-lead geochronology, thermobarometry and thermal modeling /". [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:3350508.
Texto completoTitle from home page (viewed on Oct. 8, 2009). Source: Dissertation Abstracts International, Volume: 70-03, Section: B, page: 1554. Adviser: Robert P. Wintsch.
Eberenz, Katharina. "argon daisy edition – DAISY in the commercial book-trade in Germany". Deutsche Zentralbibliothek für Blinde Leipzig (DZB), 2010. https://slub.qucosa.de/id/qucosa%3A1131.
Texto completoMouele, Flore. "Evolution des latérites manganesifères de Serra Do Navio (Brésil). Pétrologie et datation 40Ar/39Ar des cryptomélanes". Aix-Marseille 3, 2004. http://www.theses.fr/2004AIX30004.
Texto completoThe 40Ar/39Ar dating of the cryptomelanes (K1-2Mn8O16 nH2O) has been applied to the supergene ores of the Serra do Navio manganese deposit from North Brazil. The petrological studies show that the cryptomelanes present varied characters. The dating of these minerals suggests that the oxidation front (rates of the weathering front are about 2. 5 m/Ma) didn't always continuously propagate with time. These results confirm the existence of distinct generations of cryptomelane associated to successive weathering periods (pre-Oligocene; 25-18 Ma and 15-13 Ma; 6. 2-4. 6 Ma; 2. 6-2. 3 Ma; 0. 5-0. 2 Ma). The Oligocene and the late Miocene seem erosion periods. Then, we conclude that the 40Ar/39Ar dating of the cryptomelanes is an effective tool to study morphoclimatic events of the laterite landscapes. Two hypotheses are proposed : 1) the upper surface would be the Cretaceous-Eocene age and the lower surface to Miocene period, 2) this surfaces would be respectively from Oligocene and late Miocene periods
Catala, Juan Carlos. "Laser cooling and trapping of argon metastable atomic beam". FIU Digital Commons, 1998. http://digitalcommons.fiu.edu/etd/2083.
Texto completoLamarche, François. "Étude de collisions relativistes Argon sur Argent dans l'émulsion". Thesis, University of Ottawa (Canada), 1985. http://hdl.handle.net/10393/4988.
Texto completoDudley, John Michael. "Coherent transient phenomena in the mode-locked argon laser". Thesis, University of Auckland, 1992. http://hdl.handle.net/2292/2005.
Texto completoStevenson, Mark. "Correlation studies of the ionization of argon and calcium". Thesis, University of Newcastle Upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397363.
Texto completoMcConville, Paul. "Development of a laser probe for argon isotope studies". Thesis, University of Sheffield, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293264.
Texto completoMaher-McWilliams, C. "Creation, trapping and manipulation of a cold argon gas". Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1380709/.
Texto completoSode, Maik [Verfasser]. "Quantitative Beschreibung von Wasserstoff-Stickstoff-Argon-Mischplasmen / Maik Sode". Kiel : Universitätsbibliothek Kiel, 2014. http://d-nb.info/1048558398/34.
Texto completoKong, Yung 1967. "Particle contamination in sulfur-hexafluoride/argon plasma etching process". Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277919.
Texto completoPazzona, Federico G., Marco Sant, Evangelia Pantatosaki, George K. Papadopoulos y Doros N. Theodorou. "Analysis of argon diffusion in zeolite imidazolate framework-8". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-191467.
Texto completoCupido, Ian Patrick. "Nitrogen and argon treatment of titanium dioxide nanowire arrays". University of Western Cape, 2021. http://hdl.handle.net/11394/8040.
Texto completoTiO2 nanoparticle films are important electron transport layers (ETLs) in photovoltaics such as dye-sensitised, perovskite and polymer hetero-junction solar cells. These films, however, have significant electron trap-sites as a result of the large density of oxygen vacancies present in nano-sized TiO2. These trap-sites cause electron-hole recombination and ultimately lower photon-to-current conversion efficiency of the underlying cell during operation. Doping the TiO2 lattice with low atomic number elements such as nitrogen is a proven method to overcoming the charge transport inefficiency of TiO2 ETLs; another is the use of one-dimensional (1D) nanowires (NWs), instead of nanoparticles.
Parneix, Pascal. "Dynamique des microsolutions aniline-(argon)#n par simulation numerique". Paris 11, 1993. http://www.theses.fr/1993PA112238.
Texto completoArmijo, Michael Charles. "The vacuum ultraviolet emission of the argon fluoride molecule /". The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487588249823041.
Texto completoChang, Bor-Chen. "Electronic spectroscopy of argon-hydroxyl and neon-hydroxyl complexes /". The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487844948074256.
Texto completoCole, Eric D. "Electrical analysis of low energy argon ion bombarded GaAs". Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53676.
Texto completoPh. D.
Žáková, Marie. "Optická emisní spektroskopie dohasínajícího plazmatu ve směsi dusík-argon". Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-216566.
Texto completoLAI, MICHELA. "Dark matter search and neutrino physics in Liquid Argon". Doctoral thesis, Università degli Studi di Cagliari, 2021. http://hdl.handle.net/11584/308084.
Texto completoKarderinis, Sideris. "Spectroscopic studies of radio-frequency plasmas". Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325952.
Texto completoTshoso, Gomotsang. "Structure, chronologie et mode de mise en place du système géant de dykes de l'Okavango, Nord-Botswana : Une approche multidisciplinaire". Brest, 2003. http://www.theses.fr/2003BRES2029.
Texto completoLo, Bello Philippe. "Géochronologie par la méthode 39Ar/40Ar de ponces quaternaires contaminées : exemple des ponces du Mont-Doré (Massif Central français) : utilisation d'un laser continu pour la datation de minéraux individuels". Nice, 1988. http://www.theses.fr/1988NICE4184.
Texto completoTORTI, MARTA. "Effects of electric and magnetic fields on the event reconstruction in the ICARUS T600 detector". Doctoral thesis, Università degli studi di Pavia, 2017. http://hdl.handle.net/11571/1203315.
Texto completoIn recent years, a number of anomalies in neutrino oscillation scenario were observed, that point out to possible non-standard oscillations which could imply the existence of a fourth (or more) sterile neutrino. Its existence, or absence, calls for a definitive clarification with new data. In particular, the Short Baseline Neutrino program at FNAL, will exploit three Liquid Argon Time Projection Chamber (LAr TPC) detectors along the Booster Neutrino Beamline. Each detector has different mass and a different position: the near detector SBND is the smallest, the intermediate detector MicroBooNE is the medium sized while the biggest one is the far detector, the ICARUS T600. This Ph.D. thesis is focused on the ICARUS T600 detector, the largest LAr TPC ever built, which concluded successfully the operation at LNGS in Italy. Here it was exposed at underground conditions to the CNGS beam to study oscillations. After the CNGS shut down, the detector continued taking data with cosmic rays until it was de-commissioned and transported to CERN, where it is now under refurbishment, before moving to FNAL. In a LAr TPC, when a charged particle crosses the detector, ionizing electrons are drifted towards the wire anode planes, where they are collected providing two spatial coordinates of the track; arrays of PMTs detect scintillation light, providing the measurement of the absolute time of occurrence that, combined with the knowledge of the drift velocity, permits the determination of the third coordinate of the track, that along the drift direction. The goal of the ICARUS reconstruction procedure is to extract, in an accurate way, all the physical information contained in the wire and PMT output signals, to build a complete 3D spatial and calorimetric picture of the event. To have this faithful event reconstruction, it is mandatory to determine wire and drift coordinates accurately and so it is essential to understand everything that could distort the information. The uniformity of electric field is essential in order to ensure a uniform drift velocity and thus the proportionality between drift time and drift coordinate. Electric field distortions may arise by a local accumulation, along the drift path, of positive ions, which are drifted towards the cathode more slowly than the electrons. This accumulation is emphasised by high interaction rate, given for example by high cosmic ray flux. This problem, called space charge, could be present at FNAL, where the ICARUS detector will be placed at shallow depths. In order to understand the influence of this effect in track reconstruction, a data sample is analysed, collected when the detector was at surface condition for a test run in Pavia. In the thesis are described the parameters used to study space charge effects in the ICARUS detector and the obtained results are illustrated. As stated before, the drift coordinate precision is derived by the electrons drifted towards the wire planes and it is affected by several factors, such as the diffusion. To evaluate the diffusion parameter, a dedicated run with different electric field values was performed collecting cosmic rays at the end of LNGS run. The analysis of these data samples is pointed out, considering the dependence of the width of the signal registered by the TPC. The ICARUS Collaboration is also involved in a long time project, called DUNE (Deep Underground Neutrino Experiment): it will be a long baseline experiment, with modular kiloton LAr-TPCs, to be built in the next 20 years. The T600 could be used as Near Detector, once provided with a magnetic field for particle momentum measurements and charged particle identification. The presence of a magnetic field introduces new parameters and possibilities for the reconstruction procedure. In this framework, an algorithm is developed, in order to discriminate between electron neutrino and electron antineutrino, considering their interaction products.