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Dissertations / Theses on the topic 'Collisional'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Loveland, Damien Gerard. "Collisional recombination lasers." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305502.

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2

Horton, Timothy Scott. "COLLISIONAL AND RADIATIVE RELAXATION IN SODIUM DIMER AND ARGON ATOM COLLISIONS." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1480693544113525.

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3

Crossman, Statter Gregory Christopher. "Collisional relaxation in plasmas." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27637.

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The energy relaxation of two types of fully ionized plasma systems are determined with the solution of the Fokker-Planck equation. In both cases the plasma constituents are treated as being point-like and structureless and the plasma relaxes collisionally in the absence of spatial gradients and external electric and magnetic fields. The first plasma system consists of one plasma species dilutely dispersed in a second plasma which acts as a heat bath at equilibrium. The initial energy distribution of the dilute constituent is chosen to be a delta function and the approach to a Maxwellian distr

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4

Harris, Allison Lynn. "Fully differential cross sections for four-body scattering processes." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Harris_09007dcc806c3b59.pdf.

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Thesis (Ph. D.)--Missouri University of Science and Technology, 2009.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed August 25, 2009) Includes bibliographical references (p. 84-92).

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5

Harris, M. "Collisional effects in atomic spectra." Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.352727.

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6

Zemp, Marcel. "Collisionless and collisional dynamics in astrophysics /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16801.

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7

Nelson, Paul Redfield. "Applications of analytical collisional mass spectrometry." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/27053.

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8

Cunningham, D. G. "Pulsed Raman and collisional induced lasers." Thesis, Queen's University Belfast, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372991.

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9

Attree, Nicholas Oliver. "Collisional features in Saturn's F ring." Thesis, Queen Mary, University of London, 2015. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8915.

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The role of physical collisions in shaping Saturn's F ring is explored using a mixture of dynamical theory, image analysis and computer simulations. The F ring is highly dynamic, being perturbed by the nearby moons, Prometheus and Pandora, and by a population of small bodies, whose presence is inferred by their influence on the ring, charged particle data and, occasionally, direct detection. Small-scale features, termed `mini-jets', are catalogued from images taken by the Imaging Science Subsystem of the Cassini spacecraft. More than 1000 are recorded, implying a population of 100 objects on n

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10

Kaislaniemi, Lars Mikael. "Dynamic modelling of post-collisional magmatism." Thesis, Durham University, 2015. http://etheses.dur.ac.uk/10970/.

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This study addresses the question of post-collisional magmatism and its production mechanisms, addressing especially the mantle processes involved. Numerical experiments are conducted to examine the effects of viscosity weakening by subduction related water content increase in the upper mantle and the resulting sub-lithospheric small-scale convection. The models presented incorporate parameterized and thermodynamic melting models, and take into account variable relationships between mantle water content, mantle strength, water extraction by partial melting and related depletion stiffening. The

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11

Zenit, Camacho José Roberto Hunt Melany L. "Collisional mechanics in solid-liquid flows /." Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/CaltechETD:etd-08122005-140811.

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12

Salo, Heikki. "On the collisional dynamics of Saturn's rings." Oulu : University of Oulu, 1985. http://catalog.hathitrust.org/api/volumes/oclc/13016369.html.

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13

Szebesta, Daryl. "Collisional and radiative effects in atomic spectra." Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484204.

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14

McHugh, D. R. "Collisional and radiative studies in atomic spectra." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376224.

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15

Shannon, I. "Collisional and radiative effects in atomic spectra." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371770.

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16

Hedley, John. "Collisional and radiative processes in atomic spectra." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295500.

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17

Spracklen, Edmund Francis. "Inner shell lasing via electron collisional ionisation." Thesis, University of York, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442366.

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18

Parry, Imogen Sophie. "Collisional and photoexcitation of transition metal clusters." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:b1f2fc37-97ff-4500-ab34-ceb7e515b9d2.

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The properties of transition metal clusters differ from those of both atomic and bulk size regimes. Such clusters are incompletely understood and potentially useful, making them attractive targets for further study. The very smallest clusters studied in this thesis (CuO, Cu<sub>2</sub> and Cu<sub>3</sub>) have been investigated with velocity map imaging. 1+1' photodissociation of CuO X <sup>2</sup>Π<sub>3/2</sub> was observed, via the C, D, E, F and H states of CuO. CuO&ast; was photodissociated to form Cu(<sup>2</sup>D<sub>3/2</sub>) + O(<sup>1</sup>D<sub>2</sub>). D<sub>0</sub>(CuO) was d

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19

Bottke, William Frederick Jr. "The collisional and dynamical evolution of asteroids." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187125.

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Understanding asteroid collisional and dynamical evolution necessitates the use of statistical methods, since an asteroid's physical and orbital characteristics are modified throughout its lifetime by collisions and planetary perturbations. Thus, my thesis investigates evolutionary trends for asteroids by calculating and applying parameters such as collision probabilities, impact velocities, and collisional and dynamical lifetimes. I found that previous calculations of collision probabilities between pairs of asteroids on independent Keplerian orbits often yielded inconsistent results. By corr

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20

Roberts, Gareth. "Collisional processes of laser-excited alkaline earth atoms." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.346405.

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21

David, Nicholas. "Molecular dynamic calculations of collisional effects in plasmas." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418564.

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22

Shaffer, Nathaniel R. "Theory of collisional transport in ultracold neutral plasmas." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6638.

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Ultracold neutral plasmas (UNP) are laboratory plasmas formed by the photoionization of a magneto-optically trapped and cooled gas. Because of their unusually low temperatures, UNPs are an example of a strongly coupled plasma, meaning that the potential energy of Coulomb interactions between particles is comparable to or greater than their thermal kinetic energy. In the field of strongly coupled plasmas, which also includes dense plasmas found in astrophysics and inertial confinement fusion experiments, there is a pressing need to better understand the collisional transport of matter, momentum

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23

Buggle, Christian. "Collective and collisional properties of the Rubidium quantum gas." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2005. http://dare.uva.nl/document/78220.

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24

Carty, David. "Collisional processes of astrochemical importance at very low temperatures." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403473.

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25

Uhomoibhi, James Onohuome. "Collisional excitation and recombination pumped soft X-ray lasers." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261883.

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26

Cooper, Helen Jill. "Mass spectrometric studies of collisional activation and target capture." Thesis, University of Warwick, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245936.

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27

Bhatti, Zaheer Ahmed. "Theoretical studies of collisional energy transfer in unimolecular reactions." Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286244.

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28

Segal, D. M. "Collisional redistribution of light in the Mercury-Krypton system." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47249.

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29

Gollin, Devis. "An investigation on the collisional behaviour of granular flows." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/18084/.

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Granular materials are encountered in a diverse range of geophysical contexts such as landslides and debris flows. This research aims to improve our knowledge of debris flows by means of experimental, numerical and theoretical work with a specific focus on the recently developed extended kinetic theory (EKT) for dry granular flows over bumpy bases. Debris flows undergo rapid rates of deformation in which momentum transfer is mainly carried by frictional and collisional stresses. The random components that generate particle stresses through collisions can be related to the concept of granular t

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30

Cohen, Michael H. "Collisional activation dynamics of ion systems associated with water /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488187763848448.

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31

Stanier, Adam. "Magnetic reconnection and particle acceleration in semi-collisional plasmas." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/magnetic-reconnection-and-particle-acceleration-in-semicollisional-plasmas(26c3b17d-87ca-4d98-b5b5-3a3d78e0dd03).html.

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Magnetic reconnection is an important mechanism for the restructuring of magnetic fields, and the conversion of magnetic energy into plasma heating and non-thermal particle kinetic energy in a wide range of laboratory and astrophysical plasmas. In this thesis, reconnection is studied in two semi-collisional plasma environments: flares in the solar corona, and the start-up phase of the Mega-Ampere Spherical Tokamak (MAST) magnetic confinement device. Numerical simulations are presented using two different plasma descriptions; the test-particle approach combined with analytical magnetohydrodynam

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32

Spencer, Stefan. "W XLV : structural and collisional atomic generation for fusion." Thesis, Queen's University Belfast, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.711906.

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33

Stewart, Sarah T. Ahrens T. J. "Collisional processess involving icy bodies in the solar system /." Diss., Pasadena, Calif. : California Institute of Technology, 2002. http://resolver.caltech.edu/CaltechETD:etd-09242008-095607.

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34

Joseph, Gustavo Hunt Melany L. "Collisional dynamics of macroscopic particles in a viscous fluid /." Diss., Pasadena, Calif. : California Institute of Technology, 2003. http://resolver.caltech.edu/CaltechETD:etd-05302003-171943.

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35

GASBARRI, GIULIO. "Collisional Models for a Quantum Particle in a Gas." Doctoral thesis, Università degli Studi di Trieste, 2017. http://hdl.handle.net/11368/2908107.

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In the last decades important steps has been made to understand the quantum behaviour of a test particle in a gas. However the most refined theoretical collisional models proposed so far seem not to be in agreement with each other. The open dabate about which model is the one that correctly describes a particle in a gas is a witness that the validity of these models is still unclear. A better understanding of the quantum behavior of a test particle in a gas is not only desirable, but would also help in understanding the non-classical process of decoherence, which is believed to be of crucial i

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36

Belkhiri, Madeny. "Plasma out of thermodynamical equilibrium : influence of the plasma environment on atomic structure and collisional cross sections." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112268/document.

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Dans les plasmas chauds denses, la distribution spatiale des électrons libres et des ions peut affecter fortement la structure atomique. Pour tenir compte de ces effets, nous avons implémenter un potentiel plasma fond´ sur le modèle d’un gaz d’électron uniforme et sur une approche de type Thomas-Fermi dans le Flexible Atomic Code (FAC). Ce code a été utilisé, pour obtenir les énergies, les fonctions d’onde, et les taux radiative modiﬁés par l’environnement plasma. Dans des ions hydrogénoides, les résultats numériques ont été comparés avec succès à un calcul analytique basé sur la théorie des p

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37

Strain, Robert Mills. "Some applications of an energy method in collisional kinetic theory /." View online version; access limited to Brown University users, 2005. http://wwwlib.umi.com/dissertations/fullcit/3174679.

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38

Pischke, Philipp [Verfasser]. "Modeling of collisional transport processes in spray dynamics / Philipp Pischke." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1058348051/34.

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39

Spencer, Christopher J. "Generation and preservation of continental crust in collisional orogenic systems." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/11966.

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The continental crust is the archive of Earth history. Much of what we know about the development of Earth is learned from the continental crust, and it is within the crust that many natural resources are found. Hence, understanding its formation and evolution is a key aspect to a deeper knowledge of the Earth system. This thesis is a study of the processes that have formed and shaped the distribution of continental crust, with specific focus on crustal development associated with the Rodinian supercontinent and the Grenville Orogeny spanning ca. 1200 to 900 Ma. Specifically it addresses an as

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40

Wood, Mark. "Combined radiative and collisional effects in the spectrum of ytterbium." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295510.

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41

Paterson, Grant. "Collisional depolarisation of rotational angular momentum in the OH Radical." Thesis, Heriot-Watt University, 2011. http://hdl.handle.net/10399/2450.

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Polarisation Spectroscopy (PS) has been used as a novel approach for measuring the collisional removal of bulk rotational orientation and alignment in OH (X 2Π3/2, v = 0, j = 1.5 – 6.5, e) and OH (A 2Σ+, v = 1, N = 1 – 5, f1). Both one-colour degenerate PS (OCPS) and two-colour PS (TCPS) have been exploited. TCPS provides a route to measuring thermal rate constants (298 K) for the collisional evolution of rotational polarisations in unique rotational quantum states. For OH (X), the dependence on the decay of the PS signal was investigated with a number of collision partners: He, Ar, Xe N2 and

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42

Dif-Pradalier, Guilhem. "First-principle description of collisional gyrokinetic turbulence in tokamak plasmas." Aix-Marseille 1, 2008. http://www.theses.fr/2008AIX11048.

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En tant que milieu rarefie, un plasma de tokamak est affecte de maniere fondamentale par des effets resonants entre ondes et particules, par des phenomenes de piegeage locaux, des phenomenes d'orbite finie et est intrinsequement un milieu faiblement collisionnel. Pour toutes ces raisons, toute description auto-coherente de la reponse du plasma devra se faire dans le cadre de la theorie cinetique, avec inclusions des collisions coulombiennes. Grace aux developpements de la simulation numerique, est apparue la possibilite de calculer la turbulence dans les plasmas directement a partir des equati

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43

Liu, Qingnan. "Collisional quenching dynamics and reactivity of highly vibrationally excited molecules." College Park, Md. : University of Maryland, 2008. http://hdl.handle.net/1903/8817.

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Thesis (Ph. D.)--University of Maryland, College Park, 2008.<br>Thesis research directed by: Dept. of Chemistry and Biochemistry. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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44

HILTON, DOUGLAS ALAN. "A PARTIALLY COLLISIONAL MODEL OF THE TITAN HYDROGEN TORUS (SATURN)." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184064.

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A numerical model has been developed for atomic hydrogen densities in the Titan hydrogen torus. The effects of occasional collisions were included in order to accurately simulate physical conditions inferred from the Voyager 1 and 2 Ultraviolet Spectrometer (UVS) results of Broadfoot et al. (1981) and Sandel et al. (1982). The model employed Lagrangian perturbation of orbital elements of hydrogen atoms launched from Titan and Monte-Carlo simulation of collisions and loss mechanisms. The torus is found to be azimuthally symmetric with the density sharply peaked at Titan's orbit, and decreasing

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45

Singh, Divya. "Collisional effects on THZ radiation generated by laser plasma interaction." Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7051.

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46

Rosano, William Joseph. "Chemiluminescence and laser induced fluorescence of the group IVA and IB elements with halogen molecules /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487263399026961.

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47

Fontana, Eduardo. "Caracterização geoquímica e petrogenética dos granitóides Arroio Divisa, região de Quitéria, Rio Grande do Sul." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/32666.

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Os Granitóides Arroio Divisa (GAD), localizados na região de Quitéria, porção leste do Escudo Sul-rio-grandense, constituem um corpo alongado de direção NE-SW, com apro-ximadamente 30 km de extensão e 1 a 6 km de largura. Ao norte, são intrusivos em metatona-litos, metagranodioritos e gnaisses tonalíticos a dioríticos do Complexo Arroio dos Ratos, de idade paleoproterozóica, e ao sul são intrudidos por granitos e riolitos neoproterozóicos. Os GAD são predominantemente granodioritos e granitos foliados, de textura equigranular média a grossa, contendo anfibólio e biotita, além de titanita, zirc

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48

Hansen, Dirk. "Collisional properties of metastable calcium atoms in a miniaturized ioffe trap." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=978949374.

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49

Taheri, Nazli. "Experimental study of the Maxwell stress in electromagnetic collisional drift turbulence." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p1450167.

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Thesis (M.S.)--University of California, San Diego, 2008.<br>Title from first page of PDF file (viewed March 25, 2008). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 103-104).

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50

Mukhtar, Qaisar. "On Monte Carlo Operators for Studying Collisional Relaxation in Toroidal Plasmas." Doctoral thesis, KTH, Fusionsplasmafysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-120590.

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This thesis concerns modelling of Coulomb collisions in toroidal plasma with Monte Carlo operators, which is important for many applications such as heating, current drive and collisional transport in fusion plasmas. Collisions relax the distribution functions towards local isotropic ones and transfer power to the background species when they are perturbed e.g. by wave-particle interactions or injected beams. The evolution of the distribution function in phase space, due to the Coulomb scattering on background ions and electrons and the interaction with RF waves, can be obtained by solving a F

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