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11	Samtalsdeltagarnas roller i en podcast : En samtalsanalytisk studie av ett institutionellt mediesamtal Stjerngren Melin, Elin January 2021 (has links) I denna uppsats genomförs en samtalsanalys (CA) på två olika avsnitt från podcasten Värvet. Samtalsdeltagarna i materialet är podcastens programledare Kristoffer Triumf samt partiledarna Jonas Sjöstedt och Jimmie Åkesson. Syftet med uppsatsen är att ur ett språkvetenskapligt perspektiv analysera hur uppbackningar, avbrott och skratt fungerar i ett institutionellt mediesamtal där deltagarna har tydliga roller att utgå ifrån. Även samtalets kontext till analyskategorierna analyseras. Resultatet i analysen visar att samtliga samtalsdeltagare följer de normer som tillskrivs inom ett institutionellt mediesamtal - där både intervjuare och intervjuobjekt integrerar i samspel. Uppbackningar som Mm och Aa används mest av Triumf i syfte att ge en fortsättningssignal till den som talar, samt att han inleder samtalet, ställer följdfrågor och avslutar samtalet. Skratt förekommer av alla samtalsdeltagare - men främst från intervjuobjekten Sjöstedt och Åkesson som verkar använda skrattet i syfte att lätta upp stämningen samt skapa en attityd gentemot sig själva. Avbrott i samtalet sker endast av Åkesson - där syftet verkar vara att försvara sig mot en eventuell kritik. Forskningen kan ligga till underlag för kommande analyser om institutionella mediesamtal där uppbackningar, avbrott och skratt är i fokus. Samtalsanalys institutionellt samtal institutionellt mediesamtal podcast uppbackning avbrott skratt Värvet Kristoffer Triumf Jonas Sjöstedt Jimmie Åkesson Languages and Literature Språk och litteratur
12	Study of the photoproduction of 8Li with the reaction ⁹Be(g, p)⁸Li Bernier, Nikita 19 April 2018 (has links) Le laboratoire TRIUMF se spécialise dans la production de faisceaux d’ions rares radioactifs qui sont fondamentaux en physique nucléaire et de la matière condensée, entre autres. TRIUMF construit présentement un accélérateur linéaire d’électrons supraconducteur de 50 MeV, 10 mA dans le cadre du projet ARIEL. Les électrons accélérés seront utilisés pour produire des faisceaux radioactifs par photo-désintégration. Le faisceau d’électrons est « converti » en photons par le rayonnement de freinage des électrons lorsqu’ils traversent un matériau de Z élevé placé directement devant la cible de production. La cible utilisée initialement sera du 9Be afin de produire du 8Li. Le 9Be est intégré dans un composé de BeO fabriqué à TRIUMF et conçu d’après les spécifications de l’IPN Orsay où les tests préliminaires prendront place pendant la construction d’ARIEL. La puissance déposée dans la cible et la production d’isotopes rares sont calculées avec le code de simulations Monte Carlo FLUKA. / The TRIUMF laboratory in Vancouver B.C. is a world leader in the production of rare radioactive ion beams. Such beams are fundamental in research for nuclear physics, nuclear astrophysics and solid state science among others. TRIUMF is constructing a 50 MeV, 10 mA superconducting electron linac as part of its ARIEL project. The accelerated electrons will be used to produce RIB through photodisintegration. The electron beam is “converted” into photons by braking radiation of the electrons passing through a high Z material placed immediately before the production target. The initial target to be employed is 9Be, used to produce a 8Li beam. The 9Be is imbedded in a BeO compound manufactured at TRIUMF and designed following specifications of IPN Orsay where the preliminary tests will be conducted while ARIEL is being constructed. Both the power deposition and rare isotope production rates were calculated using the Monte Carlo simulation package FLUKA. QC 3.5 UL 2013 TRIUMF Faisceaux radioactifs Faisceaux électroniques Accélérateurs linéaires Cibles (Physique nucléaire) Photons Lithium Béryllium
13	UCN Detector development for the TRIUMF Neutron EDM experiment Fleurette, Doresty Fonseca 07 April 2016 (has links) A new measurement of the neutron electric dipole moment (nEDM) is being developed at TRIUMF, where a high density source of ultra cold neutrons (UCN) is currently under construction. A fast, high-efficiency UCN detector is needed for the experiment, and a 6-Li doped glass scintillation detector is being explored for this purpose. In this work, simulations and test measurements were carried out to optimize the light guide design for the new UCN detector. Acrylic and air-core light guides, the latter with two different reflecting surfaces, were considered. Three prototype light guides were constructed and tested, and results were compared with simulations. The best solution was found to be an acrylic guide, wrapped with mylar foil. For a guide 12 cm in length as required by the experimental layout, a lower limit of approximately 25 photoelectrons per neutron capture was established for the proposed geometry and photomultiplier configuration. / May 2016
14	Investigation of magnetic order in nickel-5d transition metal systems Papadopoulos, Konstantinos January 2019 (has links) Double perovskite materials exhibit alterations in magnetic order through manipulation oftheir crystal structure. Certain ultra thin metallic bilayers can create an exotic magnetic stateof confined spin textures called skyrmions. In both cases, new atomic arrangements leadto new electrical and magnetic properties. The following work comprises two studies, bothof which examine the magnetic properties of transition metals in either powder or thin filmsamples. The first part is dedicated to a series of muon spin rotation and relaxation (muSR)experiments on a LaSrNiReO6, double perovskite, powder sample. In the muSR technique, aspin polarized muon beam is focused onto a powder envelope in low pressure and temperatureconditions. The spins of the implanted muons evolve depending on the intrinsic or externallyapplied magnetic field according to Larmor precession. The measurement is based onthe detection of decay positrons that carry this precession information on their preferreddecay directions. Measurements that were realized in wTF, ZF and LF setups, reveal asecond transition to magnetic order at Tc ≃ 22K, below a transition that was observed at T =261K from magnetic susceptibility measurements. The experimental results point to threemagnetic phases, paramagnetic for T > 261K, dilute ferrimagnetic for 22 < T < 261K and amagnetically ordered state for T < 22K, that may implicate ferro- and antiferromagnetismfrom Ni sublattices and Ni-Re interactions. The second part follows an attempt to produce and characterize ultra thin bilayer filmsfor the observation of interfacial chiral structures and skyrmions. Co/Fe/MgO (100) andW/Ni/Cu (100) bilayers were grown with magnetron sputter deposition in various layerthicknesses and their structure was determined by X-ray reflectometry (XRR). The XRRscans presented a relatively thick-layered Co/Fe/MgO film, while extremely thin and roughW/Ni/Cu bilayers, for the purposes of studying films with broken interfacial inversionsymmetry. This study was concluded with indicative magneto-transport measurements thatalso point to the reconfiguration of the growth procedure. muSR muons skyrmions magnetism transition spin rotation relaxation resonance thin films transition metals MBE sputtering XRR reflectivity molecular beam epitaxy x ray TRIUMF double perovskite longitudinal transverse nickel Ni asymmetry positron depolarization chiral lattice helical DM interaction Condensed Matter Physics Den kondenserade materiens fysik

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