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Dissertations / Theses on the topic 'Quench'

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1

Vorster, Willem Johannes Jacobus. "Spray quench processing." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531785.

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2

Fontecchio, Marco. "Quench probe and quench factor analysis of aluminum alloys in distilled water." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0429102-153911.

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3

Coatanea-gouachet, Marc. "Quench detection and behaviour in case of quench in the ITER magnet systems." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4739/document.

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Le quench d'un système magnétique d'ITER est une transition irréversible d'un conducteur, de l'état supraconducteur à l'état normal résistif. Cette zone normale se propage le long du câble au cours du temps, en dissipant une grande quantité d'énergie. La détection se doit d'être suffisamment rapide afin de permettre une décharge de l'énergie magnétique et éviter un endommagement permanent du système. La détection primaire de quench d'ITER est basée sur la détection de la tension due au quench, qui est le moyen le plus rapide. L'environnement magnétique perturbé pendant le scenario plasma rend
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4

Ducatel, Estelle. "Composting of ethane pyrolysis quench sludge." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0017/MQ48061.pdf.

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5

Zajc, David. "Experimental study of a quench process." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176232474.

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6

Lilley, I. "Quench correction in liquid scintillation counting." Thesis, Nottingham Trent University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376969.

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7

Huang, Taotao. "Quench modelling of high temperature superconductor." Thesis, University of Southampton, 2006. https://eprints.soton.ac.uk/65717/.

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HTS magnets have been developed to generate high magnetic fields because its high critical field at low temperatures. For HTS magnets, the design of thermal stability and protection is based on understanding of its quench behaviour. However, there are few experimental and numerical results on the quench behaviour of HTS at low temperatures. This thesis work is mainly dedicated to investigate the quench behaviour of high temperature superconductor (HTS) at low temperatures by 1D and 2D numerical analysis. In addition, this work also investigates the critical current of HTS coils made from Bi/Ag
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8

Lu, Yuan. "Heat Transfer, Hardenability and Steel Phase Transformations during Gas Quenching." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-dissertations/399.

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"Quenching is the rapid cooling process from an elevated temperature. Compared to water and oil quench medium, high pressure and velocity gas is preferred to quench medium and high hardenability steel, with the potential to reduce distortion, stress and cracks. Currently, no standard test exists to characterize the gas quench steel hardenability and measure the performance of industrial gas quench furnaces. In this thesis, the fundamental difference between the liquid and gas quenching, heat transfer coefficient, was emphasized. It has been proven that gas quenching with constant HTC cannot g
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9

Lee, Kyoungjin. "Electrical properties of quench-condensed thin film." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1596.

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10

Lu, Yuan. "A Study on Gas Quench Steel Hardenability." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-theses/125.

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Gas quench technology has been rapidly developed recently with the intent to replace water and oil quench for medium and high hardenability steel. One of the significant advantages is to reduce the distortion and stress, compared to water and oil quench. However, not like liquid quench, no gas quench steel hardenability test standard exists. The fundamental difference between liquid quench and gas quench is heat transfer coefficient. The workpiece with the same hardness after liquid and gas quench process may have different microstructure due to different cooling curves. The concept of equival
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11

Bottura, L. "The numerical solution of 'quench' in superconducting magnets." Thesis, Swansea University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636123.

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The scope of the thesis is the development and application of a model for the analysis of a quench in a large size, force-flow cooled superconducting magnet, i.e. the calculation of the thermal, hydraulic and electrical processes following the local transition of the superconducting material to the normal conducting state. The general problem is presented in Part A, with particular reference to the large size magnets designed for application in fusion experiments of the next generation. The presentation is as general as possible, so that the range of applicability is wide, and it indicates the
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12

Hirose, M., T. Masuda, Y. Ashibe, et al. "Quench-induced Partial Discharge Characteristics of HTS Cables." IOP Publishing, 2008. http://hdl.handle.net/2237/20717.

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13

Johnstone, Adam Paul. "Quench propagation in conduction cooled HTS pancake coils." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417976.

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14

Ang, Ing Chea. "Stability and quench protection of high-temperature superconductors." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35665.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.<br>Includes bibliographical references (leaves 83-84).<br>In the design and operation of a superconducting magnet, stability and protection are two key issues that determine the magnet's reliability and safe operation. Although the high-temperature superconductor (HTS) is considered much more stable than the low-temperature superconductor (LTS), it is susceptible to damage caused primarily by three events that can occur in large-scale "real" devices: 1) overheating; 2) high voltage; and, 3) overstressi
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15

Robert-Demolaize, Guillaume. "Design and performance optimization of the LHC collimation system." Université Joseph Fourier (Grenoble), 2006. http://www.theses.fr/2006GRE10215.

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Le Large Hadron Collider (LHC) du CERN est une machine circulaire utilisant des aimants supraconducteurs à fort champ pour faire circuler deux faisceaux de protons ayant une énergie maximale de 7 TeV. La luminosité de faisceau maximale est estimée à 10 34 cm2s-1. Il est important de nettoyer chaque faisceau de son halo afin d'éviter le quench d'un aimant; on utilise alors des collimateurs, installés à des endroits adéquats de la machine de sorte à constituer un système multi niveau. L'inefficacité de ce système doit être bien plus petite que pour tout autre machine, soit environ 0. 00002 % à 7
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16

Mahar, Scott B. "Spontaneous brillouin scattering quench diagnostics for large superconducting magnets." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/53258.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2008.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 243-250).<br>Large superconducting magnets used in fusion reactors, as well as other applications, need a diagnostic that can non-invasively measure the temperature and strain throughout the magnet in real-time. A new fiber optic sensor has been developed for these long-length superconducting magnets that simultaneously measures the temperature and strain based on spontaneous Brillouin scattering in an optica
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17

Donati, Laurent. "Experimental investigation of Zn vapour oxidation in a quench apparatus." Zürich : ETH, Eidgenössische Technische Hochschule Zürich, Institut für Ergenietechnik, 2006. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=280.

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18

Malcomson, Matthew. "Momentum evolution numerics of an impurity in a quantum quench." Thesis, Lancaster University, 2016. http://eprints.lancs.ac.uk/78429/.

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A discussion on the momentum evolution of an impurity interacting via a finite delta potential repulsion with a non-interacting fermionic background gas is presented. It has recently been shown that the momentum evolution of this system displays two interesting features, namely a non-zero thermalised value and a longlived quantum mechanical oscillation around this plateau named “quantum flutter” [Mathy, Zvonarev, Demler, Nat. Phys. 2012]. We discuss revivals in the momentum of the impurity, which have been seen before but not yet thoroughly investigated. Subsequently it is shown the quantum fl
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19

Ziraldo, Simone. "Thermalization and relaxation after a quantum quench in disordered Hamiltonians." Doctoral thesis, SISSA, 2013. http://hdl.handle.net/20.500.11767/4817.

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In the present thesis we study the unitary dynamics and the thermalization properties of free-fermion-like Hamiltonians after a sudden quantum quench in presence of disorder. With analytical and numerical arguments, we show that the existence of a stationary state and its description with a generalized Gibbs ensemble (GGE) depend crucially on the observable considered (local versus extensive, one-body versus many-body) and on the localization properties of the final Hamiltonian. We then show an extension of the Wang-Landau algorithm which allows the computation of weighted distributions associ
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20

Qu, Hao. "Advanced High Strength Steel Through Paraequilibrium Carbon Partitioning and Austenite Stabilization." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1283353953.

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21

Chigusa, S., N. Hayakawa, and H. Okubo. "Quench-induced dynamic breakdown strength of liquid helium for superconducting coils." IEEE, 2000. http://hdl.handle.net/2237/6763.

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22

Shajii, A. (Ali). "Theory and modelling of quench in cable-in-conduit superconducting magnets." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11987.

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23

Östlund, Rickard. "Microstructure based modelling of ductile fracture in quench-hardenable boron steel." Doctoral thesis, Luleå tekniska universitet, Material- och solidmekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26413.

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Reduction of fuel consumption and emissions by vehicle weight minimization constitute a major driving force for the development of new materials and manufacturing processes in the automotive industry. Simultaneously formed and quenched boron steel components have higher strength to weight ratio than conventional mild steel components. Additionally, hot formed components can be tailored to have regions with lower strength and higher ductility, improving their crash performance. This is often realized via dierential in-die cooling rates, thus yielding a variable microstructure compositiongiving
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24

ISLAM, MD SHAHRUL. "Can Asymmetry Quench Self-Heating in MOS High Electron Mobility Transistors?" OpenSIUC, 2020. https://opensiuc.lib.siu.edu/theses/2736.

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High electron mobility transistors (HEMTs) have long been studied for high frequency and high-power application. Among widely known high electron mobility transistors, AlGaN/GaN HEMTs are having the upper hand due to high electron mobility of the GaN channel. Over the times, issues like current collapse, gate leakage, self-heating and gate lag have questioned the performance and reliability of these devices. In the recent years, engineers have come up with newer architectures to address some of these issues. Inserting a high-k dielectric oxide layer in the gate stack proved to be an effective
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25

Poole, Charles Randall. "QUENCH PROTECTION STUDIES OF MAGNESIUM DIBORIDE SUPERCONDUCTING MAGNETS FOR MRI APPLICATIONS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1523017967730333.

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26

Mohamed, Mohamed Saad Kamel. "An investigation of hot forming quench process for AA6082 aluminium alloys." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6147.

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This thesis is concerned with the mechanical properties and microstructure evolution during the novel solution Heat treatment Forming cold die Quenching (HFQ) process. HFQ is a hot sheet forming technology which incorporates the forming and quenching stages to produce high strength and high precision Al-alloy sheet parts. The work in the thesis divided into three main sections: Firstly, viscoplastic behaviour of AA6082 at different deformation temperatures and strain rates was identified through analysis of a programme of hot tensile tests. Based on the results from the hot tensile tests, a se
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27

Patki, Rahul P. "Quench Crystallization of Linear Polyethylene: Crystallization Kinetics, Morphology and Structure Investigation." Cincinnati, Ohio : University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view.cgi?acc_num=ucin1227282696.

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28

Merchant, Lynne M. "Variation of the superconductor order parameter in quench-condensed granular films /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p9984298.

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29

Menegoz, Giuseppe. "Prethermalization after a sudden quench in a weakly interacting Bose system." Doctoral thesis, SISSA, 2014. http://hdl.handle.net/20.500.11767/3872.

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We calculate the dynamics of local and non-local correlation functions of one and threedimensional weakly interacting Bose gas after an interaction quench. Within the Bogoliubov approximation we discuss the resulting quasi-steady prethermal state and relaxation to it. We discuss the deacay rates of Bogoliubov quasi-particles characterizing the expected departure from the prethermal state towards a fully thermalized one. We conclude that prethermalization in this situation manifest as a crossover.
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30

Huang, Yawei. "Etude et modélisation des phénomènes thermohydrauliques résultant du quench d'un aimant supraconducteur refroidi en hélium supercritique." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS230/document.

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Au cours des dernières décennies, le phénomène de quench a été une des problématiques les plus importantes abordées dans les conceptions d’aimants supraconducteurs. En effet, la transition de quench d’un aimant de son état supraconducteur à son état normal induit une grande quantité de l’énergie par effet Joule. Cet apport de chaleur va ensuite augmenter rapidement la température du conducteur ainsi que la pression du liquide de refroidissement à l’hélium. Le dépassement d’un certain seuil sur ces deux paramètres peut engendrer une détérioration irréversible à l’aimant et au système de refroid
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31

Hayakawa, N., F. Iwahana, S. Chigusa, and H. Okubo. "Highly time-resolved measurement of quench inception and propagation in ac superconducting wires." IEEE, 2000. http://hdl.handle.net/2237/6752.

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32

Angelelli, Mario. "Bethe Ansatz techniques for quasilocal charges in quench problems of integrable models." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17960/.

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Diamo un' introduzione sui due metodi fondamentali per risolvere sistemi integrabili in una dimensione: il Coordinate Bethe Ansatz e l'Algebraic Bethe Ansatz. Concentriamo particolarmente la nostra attenzione su due catene di Heisenberg ampiamente studiate: il modello XXX e il modello XXZ. Successivamente presentiamo una breve panoramica nell'ambito del quench (in inglese il verbo to quench significa spegnere), che ha portato negli ultimi dieci anni a grandi progressi nel campo della fisica del non-equilibrio. Le tecniche fondamentali usate per implementare l'idea del quench sono l' Ense
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33

Hayakawa, N., S. Ueyama, H. Kojima, F. Endo, T. Masuda, and M. Hirose. "Electrical Insulation Characteristics of HTS Cables Under Quench-Induced Thermal Stress Condition." IEEE, 2007. http://hdl.handle.net/2237/9462.

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34

Kato, T., H. Shimizu, Y. J. Tang, N. Hayakawa, Y. Yokomizu, and T. Matsumura. "Quench current level-time characteristics of AC insulated multi-strand superconducting cables." IEEE, 1997. http://hdl.handle.net/2237/6805.

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35

Szwangruber, Piotr [Verfasser], Oliver [Akademischer Betreuer] Boine-Frankenheim, and Rüdiger [Akademischer Betreuer] Schmidt. "Quench Study for FAIR Magnets / Piotr Szwangruber ; Oliver Boine-Frankenheim, Rüdiger Schmidt." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/1152007122/34.

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36

Catalão, Ricardo Jorge Carreira Ferreira de Castelo. "Desenvolvimento de um sistema de detecção de quench baseado em campo magnético." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10234.

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Dissertação para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores<br>A eficiência energética tem vindo a assumir importância vital na sociedade actual, sendo por isso essencial criar estratégias que visem melhorar o aproveitamento que é feito dos recursos energéticos existentes. A utilização dos materiais supercondutores de alta temperatura no âmbito da optimização do armazenamento de energia é uma das opções interessantes a ter em conta para um desenvolvimento sustentável e de longo prazo. Assegurar a estabilidade térmica e eléctrica deste tipo de materiais é assim
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37

Xu, Yan 1963 Jan 31. "Effect of quench rate on the coercivity of Nd-Fe-B permanent magnets." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55669.

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38

Tavora, Marco. "Prethermalization, universal scaling at macroscopic short times, and thermalization following a quantum quench." Thesis, New York University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3716614.

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<p>The study of the quantum dynamics of many-particle systems has recently become the subject of intensive research, stimulated in part by enormous progress in experimental techniques, particularly the manipulation of ultracold atomic gases, which allow high tunability of artificial systems with decoherence and dissipation strongly suppressed. One of the simplest protocols for out of equilibrium dynamics is a quantum quench where the time-scale associated with an external variation is much smaller than the typical relaxation time of the system. Here we first study in detail the dynamics after
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39

Haid, Benjamin J. (Benjamin John Jerome) 1974. "Two-dimensional quench propagation model for a three-dimensional "high-temperature" superconducting coil." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9598.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.<br>Includes bibliographical references (leaves 89-90).<br>Quenching is a thermal failure mechanism encountered with superconducting magnets. When a section of conductor is driven normal by an external heat input, the magnet transport cur­rent flows through a resistance, causing joule dissipation. If heat is not conducted away from the normal region faster than it is dissipated, the normal region will grow and the tempera­ture will increase indefinitely. Growth of the normal region is commonly refereed
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40

Casali, Marco <1984&gt. "Experimental Analysis and Numerical Simulation of Quench in Superconducting HTS Tapes and Coils." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6242/1/Experimental_Analysis_and_Numerical_Simulation_of_Quench_in_Superconducting_HTS_Tapes_and_Coils.pdf.

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The quench characteristics of second generation (2 G) YBCO Coated Conductor (CC) tapes are of fundamental importance for the design and safe operation of superconducting cables and magnets based on this material. Their ability to transport high current densities at high temperature, up to 77 K, and at very high fields, over 20 T, together with the increasing knowledge in their manufacturing, which is reducing their cost, are pushing the use of this innovative material in numerous system applications, from high field magnets for research to motors and generators as well as for cables. The ai
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41

Casali, Marco <1984&gt. "Experimental Analysis and Numerical Simulation of Quench in Superconducting HTS Tapes and Coils." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6242/.

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The quench characteristics of second generation (2 G) YBCO Coated Conductor (CC) tapes are of fundamental importance for the design and safe operation of superconducting cables and magnets based on this material. Their ability to transport high current densities at high temperature, up to 77 K, and at very high fields, over 20 T, together with the increasing knowledge in their manufacturing, which is reducing their cost, are pushing the use of this innovative material in numerous system applications, from high field magnets for research to motors and generators as well as for cables. The ai
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42

Piatkowski, Nicolas. "Zn-nanoparticle in-situ hydrolysis for hydrogen production in a high quench rate reactor." Zürich : Departement Maschinenbau und Verfahrenstechnik, Eidgenössische Technische Hochschule, 2007. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=312.

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43

Shimizu, H., Y. Yokomizu, T. Matsushima, et al. "Position of quench initiation in 6 kV-200 A class superconducting fault current limiter." IEEE, 1997. http://hdl.handle.net/2237/6806.

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44

Shimizu, H., T. Shiroki, Y. Yokomizu, and T. Matsumura. "Dependence of quench current level of superconducting wire and cable on the winding tension." IEEE, 1999. http://hdl.handle.net/2237/6792.

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45

Nowill, Courtney Ann. "Investigation of the quench and heating rate sensitivities of selected 7000 series aluminum alloys." Link to electronic thesis, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-081307-103919/.

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46

Caldas, Victor. "Morphology, physical and tensile properties of quench-cooled isotactic polypropylene films and spunbonded fabrics." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40026.

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The room temperature morphology of quench-cooled isotactic polypropylene (iPP) films and its development were investigated by scanning transmittance electron microscopy (STEM) and differential scanning calorimetry (DSC). STEM dark field images revealed that within an amorphous matrix there exist microcrystalline regions, 160 A in size on the average, having the $ alpha$-monoclinic crystal form. Regions of lower crystalline order were also observed which have an $ alpha$-monoclinic crystal form that has a substantially longer b crystallographic axis. DSC studies indicate that during quench-cool
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47

Bianchetti, Marco. "Liquid Neon system and characterization of AC loss and quench propagation for MgB2 conductors." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/65715/.

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Magnesium diboride (MgB2) was found to have superconducting characteristics in January 2001 below 39K. The abundance and low cost of its components and the possibility to manufacture long length of wires and tapes using the powder in tube technique makes this material a good candidate for cheaper alternative to many low temperature superconductor application. A closed system Neon liquefier and dedicated hybrid current leads have been designed to investigate properties of MgB2 based conductors in liquid Neon in the temperature range from 24.5K to 31K. The system is capable of liquefying 3 litre
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48

Abdel, Maksoud Walid. "Modélisation des phénomèmes thermohydrauliques résultant du quench d'un aimant supraconducteur refroidi à l'hélium superfluide." Paris 11, 2010. http://www.theses.fr/2010PA112254.

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Une des problématiques liées à la conception des aimants supraconducteurs refroidis par un bain d'hélium superfluide (de type Iseult) est d'assurer la sécurité de l'aimant ainsi que celle de toute l'installation cryogénique en cas de quench accidentel. Afin de répondre à cette problématique, il est nécessaire de comprendre quels sont les mécanismes physiques responsables de la montée de pression lors d'un quench. C'est pour cette raison que notre étude a consisté à modéliser les phénomènes thermohydrauliques intervenant lors du quench d'un tel aimant. Pour ce faire, on a tout d'abord réalisé e
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49

Ma, Shuhui. "Characterization of the performance of mineral oil based quenchants using CHTE Quench Probe System." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0823102-180115.

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50

D'Alessandro, Christophe [Verfasser], and Jörg [Akademischer Betreuer] Starflinger. "Improvement of quench front modelling for thermohydraulic system codes / Christophe D'Alessandro ; Betreuer: Jörg Starflinger." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2020. http://d-nb.info/1219905844/34.

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