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Tesis sobre el tema "Non-linear beam dynamics"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 18 de febrero de 2022

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1

Garland, James Matthew. "Beam dynamics studies of the EMMA linear non-scaling FFAG." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/beam-dynamics-studies-of-the-emma-linear-nonscaling-ffag(5b375a2d-0636-422d-a0d6-2cc941ebd01f).html.

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The development of charged particle accelerators is today reaching far beyond the realm of fundamental particle physics research. Many non-trivial social and political problems may find part of their solution lies in accelerator physics. For example, with fossil fuels becoming ever more controversial and expensive to obtain, the use of Accelerator Driven Sub-critical Reactors (ADSR) powered by rapid cycling, high current proton accelerators and thorium fuel could become part of the energy solution. Through the simplicity of the Bragg peak, cancer therapy could be enhanced through the use of hi
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2

Montanari, Carlo Emilio. "Diffusive approach for non-linear beam dynamics in a circular accelerator." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19289/.

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Nella fase di design e simulazione di un acceleratore circolare, risulta fondamentale avere una buona comprensione del moto betatronico non-lineare delle singole particelle, e di come questo interferisce con la qualità del fascio. In questo lavoro vengono studiati sistemi Hamiltoniani sottoposti a perturbazioni stocastiche tramite un framework diffusivo, basato sull'equazione di Fokker-Planck. Tale studio viene poi applicato all'analisi del moto betatronico non-lineare e al problema dell'Apertura Dinamica. In particolare, vengono impostate le basi per formulare un metodo di interpolazione di
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3

Giboudot, Yoel. "Study of beam dynamics in NS-FFAG EMMA with dynamical map." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/5947.

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Dynamical maps for magnetic components are fundamental to studies of beam dynamics in accelerators. However, it is usually not possible to write down maps in closed form for anything other than simplified models of standard accelerator magnets. In the work presented here, the magnetic field is expressed in analytical form obtained from fitting Fourier series to a 3D numerical solution of Maxwell’s equations. Dynamical maps are computed for a particle moving through this field by applying a second order (with the paraxial approximation) explicit symplectic integrator. These techniques are used
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4

Maclean, Ewen Hamish. "Modelling and correction of the non-linear transverse dynamics of the LHC from beam-based measurements." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:227fa9d5-bb13-4204-bf6d-6ef0ed885036.

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The non-linear beam dynamics of a circular accelerator, such as the Large Hadron Collider, can have a significant impact on its operation. In order to avoid limitations on the performance reach of the accelerator, and ensure machine protection, it is vital that the beam dynamics are well understood and controlled. This thesis presents the results of studies of non-linear beam dynamics undertaken on the Large Hadron Collider at CERN, during the 2010 to 2013 period. It sets out to quantify the understanding of the non-linear beam dynamics through the comparison of beam-based measurements to simu
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5

Peres, Nelson Antonio Martins. "Influência das vibrações do cabo na instabilidade aeroelástica de uma viga simples estaiada." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/3/3144/tde-05102005-142214/.

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Esse trabalho consiste na determinação das velocidades críticas do vento e das amplitudes das vibrações numa estrutura composta por uma viga engastada suspensa por um estai (cabo), submetida aos efeitos de vento e chuva. Foi considerada a deformação no cabo devido ao carregamento do peso próprio e o acoplamento não-linear das vibrações do cabo e da viga. Três modos de vibração são de especial interesse, chamados de primeiro modo global (flexão da viga e vibração no cabo), primeiro modo local (vibração no cabo, com flexão na viga desprezável) e primeiro modo à torção. O modelo foi reduzido a tr
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6

Nuel, Gavaldà Xavier. "Application d’algorithmes génétiques multi-objectifs et études expérimentales de la durée de vie du faisceau de l’anneau de stockage du synchrotron SOLEIL." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS205/document.

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Cette thèse est consacrée à l’optimisation des sources de lumière synchrotron. La dynamique de faisceau non linéaire de l'anneau de stockage du synchrotron SOLEIL est optimisée à l’aide d’algorithmes génétiques multiobjectifs (MOGA-ELEGANT). Le code ELEGANT est d’abord comparé avec le code étalon de SOLEIL, TRACY3. Le code MOGA est ensuite utilisé pour obtenir les meilleures configurations possible en termes d’ouvertures dynamiques et d’acceptances en énergie, qui sont fortement en rapport avec la durée de vie Touschek et l'efficacité d'injection respecti-vement. Après 1 mois de calcul sur le
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7

Lindgren, Joseph B. "Orbital Stability Results for Soliton Solutions to Nonlinear Schrödinger Equations with External Potentials." UKnowledge, 2017. http://uknowledge.uky.edu/math_etds/46.

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For certain nonlinear Schroedinger equations there exist solutions which are called solitary waves. Addition of a potential $V$ changes the dynamics, but for small enough $||V||_{L^\infty}$ we can still obtain stability (and approximately Newtonian motion of the solitary wave's center of mass) for soliton-like solutions up to a finite time that depends on the size and scale of the potential $V$. Our method is an adaptation of the well-known Lyapunov method. For the sake of completeness, we also prove long-time stability of traveling solitons in the case $V=0$.
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8

Le, Thanh Nam. "Non-linear Dynamic analysis of corotational beam structures." Thesis, KTH, Bro- och stålbyggnad, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36799.

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9

Bigot, Jean-Yves, and JEAN-BERNARD GRUN. "Bistabilite et commutations optiques dans des materiaux semi-conducteurs." Strasbourg 1, 1987. http://www.theses.fr/1987STR13119.

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Etude des differents types de bistabilite. Commutation en bistabilite optique : etude du temps de commutation et des phenomenes de ralentissement qui s'y attachent. Lien entre la branche stable de l'hysterese statique d'un bistable et les processus de ralentissement de ce bistable. Etude de la propagation d'impulsion laser ultra-courtes dans un milieu non-lineaire modelise par trois niveaux d'energie
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10

Swarup, A. Sri Sakti. "Implicit Least Squares Kinetic Upwind Method (LSKUM) And Implicit LSKUM Based On Entropy Variables (q-LSKUM)." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/239.

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With increasing demand for computational solutions of fluid dynamical problems, researchers around the world are working on the development of highly robust numerical schemes capable of solving flow problems around complex geometries arising in Aerospace engineering. Also considerable time and effort are devoted to development of convergence acceleration devices, for reducing the computational time required for such numerical solutions. Reduction in run times is very vital for production codes which are used many times in design cycle. In this present work, we consider a numerical scheme calle
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11

Bouchet, Thomas. "Non linear interaction of self-accelerating light beams." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0312.

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Dans cette thèse, nous présentons des résultats concernant la propagation d’un faisceau Airy dans un cristal photoréfractif. Le faisceau Airy est un faisceau à plusieurs lobes qui conserve la même forme tout en se propageant sur une trajectoire courbe. Le cristal photoréfractif est un milieu non linéaire. La lumière peut être imprimée à l’intérieur du cristal et/ou un faisceau lumineux peut y créer son propre guide d’ondes. La propagation du faisceau Airy est modifiée lors du passage dans le cristal. La trajectoire parabolique se transforme alors partiellement ou complètement en un faisceau sol
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12

LOPES, ELVIS DINATI CHANTRE. "NON-LINEAR DYNAMICAL ANALYSIS OF COMPOSITE FLOORS CONSIDERING THE EFFECTS OF PARTIAL INTERACTION AND BEAM TO COLUMN AND BEAM TO BEAM CONNECTIONS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21173@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O crescimento dos problemas de vibrações excessivas em edificações oriundos de atividades humanas rítmicas tem conduzido à necessidade de desenvolvimento de critérios específicos para projetos estruturais submetidos à ação dessas cargas dinâmicas. Esta foi uma das motivações para o desenvolvimento de uma metodologia de análise para investigação da resposta dinâmica de sistemas estruturais de pisos mistos (aço-concreto). Objetiva-se verificar a influência da interação aço-concr
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13

Zangeneh, Kamali Abbas. "Shear Strength of Reinforced Concrete Beams subjected to Blast Loading : Non-linear Dynamic Analysis." Thesis, KTH, Bro- och stålbyggnad, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104241.

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The experimental investigations performed on the behaviour of reinforce concrete elements subjected to blast loading have revealed that the shear mechanisms and ductility play important roles in the overall response and failure mode of such structures. The main aim of this master thesis is to study the possibility of using finite element method as a tool for predicting the dynamic response of blast loaded reinforced concrete beams and evaluation of their shear strength. In this study, the commercial software, ABAQUS/Explicit has been used by implementing appropriate constitutive material model
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14

Burgers, Kate M. "Finding the Beat in Music: Using Adaptive Oscillators." Scholarship @ Claremont, 2011. http://scholarship.claremont.edu/hmc_theses/3.

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The task of finding the beat in music is simple for most people, but surprisingly difficult to replicate in a robot. Progress in this problem has been made using various preprocessing techniques (Hitz 2008; Tomic and Janata 2008). However, a real-time method is not yet available. Methods using a class of oscillators called relay relaxation oscillators are promising. In particular, systems of forced Hopf oscillators (Large 2000; Righetti et al. 2006) have been used with relative success. This work describes current methods of beat tracking and develops a new method that incorporates the be
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15

Maestre, Heredia Jorge. "Towards the application of the isogeometric boundary element analysis to fluid mechanics: non-linear gravity waves and dynamics of deformable capsules in shear flows." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/401587.

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En aquesta tesi es desenvolupa un model numèric eficient i robust per a l’anàlisi de problemes fluid-dinàmics, que posteriorment es valida i s’aplica a dues noves configuracions: (1) les onades generades per una hidroala submergida i (2) la dinàmica d'una càpsula deformable en un flux pulsàtil. El model es basa en el Mètode dels Elements de Contorn (MEC) integrat amb la tecnologia de NURBS i T-spline. Aquesta tècnica es coneguda com Anàlisi Isogeomètric (AIG) i té certs avantatges. El més atractiu és que permet una integració directa entre programes moderns de disseny gràfic (CAD) i eines d’an
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16

Gonçalves, Sidclei Gomes. "Análise dinâmica não-linear de pisos mistos (aço-concreto) submetidos a ações humanas rítmicas." Universidade do Estado do Rio de Janeiro, 2011. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7463.

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Atualmente, o crescimento dos problemas de vibrações excessivas sobre pisos mistos (aço-concreto) tem conduzido à necessidade de desenvolvimento de critérios específicos para projetos estruturais submetidos à ação de atividades humanas rítmicas. Com base no desenvolvimento desta dissertação de mestrado, objetiva-se, principalmente, verificar a influência das ligações estruturais (ligações viga-viga), sobre a resposta dinâmica não-linear de pisos mistos (aço-concreto) de edificações, quando submetidos a cargas dinâmicas humanas rítmicas. Deste modo, o carregamento dinâmico empregado para a simu
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17

Guinot, François. "Déploiement régulé de structures spatiales : vers un modèle unidimensionnel de mètre ruban composite." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10019.

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Dans un contexte où l'utilisation de structures déployables s'est généralisée, le département Recherche de la société Thales Alenia Space étudie un nouveau concept de télescope spatial dont le miroir secondaire est déployé grâce au déroulement de six mètres rubans. Des études antérieures ont permis la mise au point d'un prototype constitué de rubans métalliques dont le déploiement s'est avéré trop violent. Dans ce travail de thèse nous proposons d'une part un nouveau type de ruban à la vitesse de déroulement maîtrisable et d'autre part un modèle original décrivant le comportement dynamique de
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18

Lopes, Fernanda da Rocha de Carvalho. "Influência do comportamento semi-rígido de placas de base e de ligações viga-coluna na resposta dinâmica de pórticos de aço." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=5646.

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Tradicionalmente, na análise e dimensionamento de estruturas de aço, assume-se que as ligações viga-coluna são rígidas ou flexíveis (rotuladas). Por outro lado, é de conhecimento geral que a grande maioria das ligações viga-coluna apresenta um comportamento intermediário, ou seja, semi-rígido. Inúmeros trabalhos de pesquisa têm sido desenvolvidos nos últimos vinte e cinco anos, de forma a estudar o comportamento desse tipo de ligação. Um dos principais objetivos desta investigação é o de propor uma metodologia de análise que represente de forma apropriada a influência do comportamento semi-ríg
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19

Lorenz, Michael. "Berechnungsmodelle zur Beschreibung der Interaktion von bewegtem Sägedraht und Ingot." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-130678.

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Die vorliegende Arbeit widmet sich der Aufgabe makroskopische Berechnungsmodelle zur Beschreibung des Drahtsägens zu erarbeiten. Ziel ist es, die wesentlichen Effekte abzubilden und den Einfluss von Prozessparametern auf die Dynamik des Systems zu bestimmen. Ein zentraler Punkt ist die Modellierung des bewegten Sägedrahtes. Durch die dem Kontinuum an den Auflagern aufgeprägte Führungsbewegung sind einerseits die Randbedingungen und andererseits ortsfest auf den Draht wirkende Lasten nichtmateriell. Die korrekte kinematische Beschreibung dieses Sachverhaltes ist essentielle Grundlage für die sp
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20

Tokluoglu, Erinc K. "Non-linear Dynamics in ETG Mode Saturation and Beam-Plasma Instabilities." Thesis, 2014. https://doi.org/10.7916/D8MG7MQZ.

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Non-linear mechanisms arise frequently in plasmas and beam-plasma systems resulting in dynamics not predicted by linear theory. The non-linear mechanisms can influence the time evolution of plasma instabilities and can be used to describe their saturation. Furthermore time and space averaged non-linear fields generated by instabilities can lead to collisionless transport and plasma heating. In the case of beam-plasma systems counter-intuitive beam defocusing and scaling behavior which are interesting areas of study for both Low-Temperature and High Energy Density physics. The non-linear
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21

Welsch, Dominic Markus [Verfasser]. "Investigation and optimization of transverse non-linear beam dynamics in the high-energy storage ring HESR / vorgelegt von Dominic Markus Welsch." 2010. http://d-nb.info/1002925991/34.

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22

Ghosh, Susanta. "Improved Numerical And Numeric-Analytic Schemes In Nonlinear Dynamics And Systems With Finite Rotations." Thesis, 2008. http://hdl.handle.net/2005/682.

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This thesis deals with different computational techniques related to some classes of nonlinear response regimes of engineering interest. The work is mainly divided into two parts. In the first part different numeric-analytic integration techniques for nonlinear oscillators are developed. In the second part, procedures for handling arbitrarily large rotations are addressed and a few novel developments are reported in the process. To begin the first part, we have proposed an explicit numeric-analytic technique, based on the Adomian decomposition method, for integrating strongly nonlinear oscil
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23

Lorenz, Michael. "Berechnungsmodelle zur Beschreibung der Interaktion von bewegtem Sägedraht und Ingot." Doctoral thesis, 2013. https://tubaf.qucosa.de/id/qucosa%3A22896.

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Die vorliegende Arbeit widmet sich der Aufgabe makroskopische Berechnungsmodelle zur Beschreibung des Drahtsägens zu erarbeiten. Ziel ist es, die wesentlichen Effekte abzubilden und den Einfluss von Prozessparametern auf die Dynamik des Systems zu bestimmen. Ein zentraler Punkt ist die Modellierung des bewegten Sägedrahtes. Durch die dem Kontinuum an den Auflagern aufgeprägte Führungsbewegung sind einerseits die Randbedingungen und andererseits ortsfest auf den Draht wirkende Lasten nichtmateriell. Die korrekte kinematische Beschreibung dieses Sachverhaltes ist essentielle Grundlage für die sp
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