Browsing Department of Physics and Technology by Title

Now showing items 2003-2022 of 2125

    • Thermally excited 630.0 nm emissions in the polar ionosphere 

      Kwagala, Norah Kaggwa (Doctoral thesis, 2018-08-24)
      This thesis investigates the importance and significance of thermally excited 630.0 nm emissions in the cusp and polar ionosphere. Thermal excitation by heated ambient electrons in the cusp and polar ionosphere is a rarely ...

    • Thermodynamic and Kinetic Modeling of CH4/CO2 Hydrates Phase transitions 

      Kvamme, B.; Baig, K.; Qasim, M.; Bauman, J. (Peer reviewed; Journal article, 2013)
      Natural gas hydrates in reservoirs are thermodynamically unstable due to exposure to mineral surfaces and possibly undersaturated phases of water and hydrate formers. Changes in global temperatures also alter the stability ...

    • Three principal components describe the spatiotemporal development of mesoscale ionospheric equivalent currents around substorm onsets 

      Juusola, Liisa; Viljanen, Ari; Partamies, Noora; Vanhamäki, Heikki; Kellinsalmi, Mirjam; Walker, Simon (Journal article; Peer reviewed, 2023)
      Substorms are a commonly occurring but insufficiently understood form of dynamics in the coupled magnetosphere–ionosphere system, associated with space weather disturbances and auroras. We have used principal component ...

    • Three-Dimensional Magnetic Reconnection With a Spatially Confined X-Line Extent: Implications for Dipolarizing Flux Bundles and the Dawn-Dusk Asymmetry 

      Liu, Yi-Hsin; Li, TC; Hesse, Michael; Sun, WJ; Liu, J; Burch, J; Slavin, James Arthur; Huang, K. (Peer reviewed; Journal article, 2019)
      Using 3‐D particle‐in‐cell simulations, we study magnetic reconnection with the X‐line being spatially confined in the current direction. We include thick current layers to prevent reconnection at two ends of a thin current ...

    • Tilstandsovervåkning av undervanns motordrift med lange forsyningskabler 

      Stjernberg, Stian (Master thesis, 2010-06-01)
      Hensikten med denne mastergradsoppgaven er å sette opp et testanlegg bestående av forsyningskabel og induksjonsmotor for å teste om tilstandsovervåkning kan utføres ved strømanalyse av lange forsyningskabler. Det skal ...

    • Time domain simulations of preliminary breakdown pulses in natural lightning 

      Carlson, Brant Edward; Liang, Can; Bitzer, Phillip M.; Christian, Hugh J. (Peer reviewed; Journal article, 2015-06)
      Lightning discharge is a complicated process with relevant physical scales spanning many orders of magnitude. In an effort to understand the electrodynamics of lightning and connect physical properties of the channel to ...

    • Time evolution of storms producing terrestrial gamma-ray flashes using era5 reanalysis data, gps, lightning and geo-stationary satellite observations 

      Tiberia, Alessandra; Mascitelli, Alessandra; D’adderio, Leo Pio; Federico, Stefano; Marisaldi, Martino; Porcù, Federico; Realini, Eugenio; Gatti, Andrea; Ursi, Alessandro; Fuschino, Fabio; Tavani, Marco; Dietrich, Stefano (Journal article; Peer reviewed, 2021)
      In this article, we report the first investigation over time of the atmospheric conditions around terrestrial gamma-ray flash (TGF) occurrences, using GPS sensors in combination with geostationary satellite observations ...

    • Time-dependent angular analysis of the decay B0s→J/ψϕ and extraction of ΔΓ s and the CP-violating weak phase ϕ s by ATLAS 

      ATLAS, Collaboration; Aad, Georges; Abajyan, T.; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdelalim, A. A.; Buanes, Trygve; Burgess, Thomas; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Stugu, Bjarne; Tonoyan, Arshak; Ugland, Maren (Peer reviewed; Journal article, 2012-12)
      A measurement of B0s→J/ψϕ decay parameters, including the CP -violating weak phase ϕ s and the decay width difference ΔΓ s is reported, using 4.9 fb−1 of integrated luminosity collected in 2011 by the ATLAS detector from ...

    • To Measure the Efficiency of Energy Transfer Systems Under External 

      Joshi, Pramanand (Master thesis, 2014-06-03)
      Transfer of power wirelessly through magnetic resonance is a hot topic these days not only for low power consumer electronics like laptops, cell phones etc. but also for high power applications like electric cars, trains ...

    • Top-quark physics at the CLIC electron-positron linear collider 

      Abramowicz, Halina; Alipour Tehrani, N; Arominski, D; Benhammou, Y; Benoit, M; Blaising, JJ; Boronat, M; Borysov, O; Bosley, RR; Božović Jelisavčić, I; Boyko, I; Brass, S; Brondolin, E; Bruckman de Renstrom, P; Buckland, M; Burrows, PN; Chefdeville, M; Chekanov, S; Coates, T; Dannheim, D; Demarteau, M; Denizli, H; Durieux, G; Eigen, Gerald; Elsener, K; Fullana, E; Fuster, J; Gabriel, M; Gaede, F; Garcia, I; Goldstein, J; Gomis Lopez, P; Graf, C; Green, S; Grefe, C; Grojean, C; Hoang, A; Hynds, D; Joffe, A; Kalinowski, J; Kacarevic, G; Kilian, W; van der Kolk, N; Krawczyk, M; Kucharczyk, M; Leogrande, E; Lesiak, T; Levy, A; Levy, I; Linssen, L; Maier, AA; Makarenko, V; Marshall, JS; Martin, V; Mateu, V; Matsedonskyi, O; Metcalfe, J; Milutinović Dumbelović, G; Munker, RM; Nefedov, Yu; Nowak, K; Nürnberg, A; Pandurović, M; Perelló, M; Perez Codina, E; Petric, M; Pitters, F; Price, T; Quast, T; Redford, S; Repond, J; Robson, A; Roloff, P; Ros, E; Rozwadowska, K; Ruiz-Jimeno, A; Sailer, A; Salvatore, F; Schnoor, U; Schulte, D; Senol, A; Shelkov, G; Sicking, E; Simon, F; Simoniello, R; Sopicki, P; Spannagel, S; Stapnes, Steinar; Ström, R; Szalay, M; Thomson, MA; Turbiarz, B; Viazlo, O; Vicente, M; Vila, I; Vos, M; Vossebeld, J; Watson, MF; Watson, NK; Weber, MA; Weerts, H; Wells, JD; Widl, A; Williams, M; Winter, AG; Wojtoń, T; Wulzer, A; Xu, B; Xia, L; You, T; Żarnecki, AF; Zawiejski, L; Zhang, C; Zhang, J; Zhang, Y; Zhang, Z; Zhemchugov, A (Journal article; Peer reviewed, 2019)
      The Compact Linear Collider (CLIC) is a proposed future high-luminosity linear electron-positron collider operating at three energy stages, with nominal centre-of-mass energies s√ = 380 GeV, 1.5 TeV, and 3 TeV. Its aim is ...

    • Toward a Next Generation Particle Precipitation Model: Mesoscale Prediction Through Machine Learning (a Case Study and Framework for Progress) 

      McGranaghan, Ryan M.; Ziegler, Jack; Bloch, Téo; Hatch, Spencer Mark; Camporeale, Enrico; Lynch, Kristina; Owens, Mathew; Gjerløv, Jesper; Zhang, Binzheng; Skone, Susan (Journal article; Peer reviewed, 2021)
      We advance the modeling capability of electron particle precipitation from the magnetosphere to the ionosphere through a new database and use of machine learning (ML) tools to gain utility from those data. We have compiled, ...

    • Toward the end-to-end optimization of particle physics instruments with differentiable programming 

      Dorigo, Tommaso; Giammanco, Andrea; Vischia, Pietro; Aehle, Max; Bawaj, Mateusz; Boldyrev, Alexey; de Castro Manzano, Pablo; Derkach, Denis; Donini, Julien; Edelen, Auralee; Fanzago, Federica; Gauger, Nicolas R.; Glaser, Christian; Baydin, Atılım G.; Heinrich, Lukas; Keidel, Ralf; Kieseler, Jan; Krause, Claudius; Lagrange, Maxime; Lamparth, Max; Layer, Lukas; Maier, Gernot; Nardi, Federico; Pettersen, Helge Egil Seime; Ramos, Alberto; Ratnikov, Fedor; Röhrich, Dieter; de Austri, Roberto Ruiz; del Árbol, Pablo Martínez Ruiz; Savchenko, Oleg; Simpson, Nathan; Strong, Giles C.; Taliercio, Angela; Tosi, Mia; Ustyuzhanin, Andrey; Zaraket, Haitham (Journal article; Peer reviewed, 2023)
      The full optimization of the design and operation of instruments whose functioning relies on the interaction of radiation with matter is a super-human task, due to the large dimensionality of the space of possible choices ...

    • Towards Neural Charged Particle Tracking in Digital Tracking Calorimeters With Reinforcement Learning 

      Kortus, Tobias; Keidel, Ralf; Gauger, Nicolas R.; Aehle, Max; Alme, Johan; Barnaföldi, Gergely Gábor; Bodova, Tea; Borshchov, Vyacheslav; Vanden Brink, Anthony; Chaar, Mamdouh; Eikeland, Viljar Nilsen; Feofilov, Gregory; Garth, Christoph; Genov, Georgi Yordanov; Grøttvik, Ola Slettevoll; Helstrup, Håvard; Igolkin, Sergey; Kobdaj, Chinorat; Leonhardt, Viktor; Mehendale, Shruti Vineet; Mulawade, Raju Ningappa; Odland, Odd Harald; O'Neill, George; Papp, Gabor; Peitzmann, Thomas; Pettersen, Helge Egil Seime; Piersimoni, Pierluigi; Protsenko, Maksym; Rauch, Max Philip; Rehman, Attiq Ur; Richter, Matthias; Röhrich, Dieter Rudolf Christian; Santana, Joshua; Schilling, Alexander; Seco, Joao; Songmoolnak, Arnon; Sudár, Ákos; Salie, Jarle Rambo; Tambave, Ganesh Jagannath; Tymchuk, Ihor; Ullaland, Kjetil; Varga-Kofarago, Monika; Volz, Lennart; Wagner, Boris; Wendzel, Steffen; Wiebel, Alexander; Xiao, Renzheng; Yang, Shiming; Yokoyama, Hiroki; Zillien, Sebastian (Journal article; Peer reviewed, 2023)
      We propose a novel technique for reconstructing charged particles in digital tracking calorimeters using reinforcement learning aiming to benefit from the rapid progress and success of neural network architectures without ...

    • Towards range-guidance in proton therapy to detect organ motion-induced dose degradations 

      Busch, Kia; Andersen, Andreas G.; Petersen, Jørgen B.B.; Petersen, Stine E.; Rønde, Heidi S.; Bentzen, Line; Pilskog, Sara Margareta Cecilia; Skyt, Peter; Nørrevang, Ole; Muren, Ludvig Paul (Journal article; Peer reviewed, 2022)
      Introduction: Internal organ motion and deformations may cause dose degradations in proton therapy (PT) that are challenging to resolve using conventional image-guidance strategies. This study aimed to investigate the ...

    • Towards the first measurement of matter-antimatter gravitational interaction 

      Evans, Craig; Aghion, Stefano; Amsler, Claude; Bonomi, Germano; Brusa, Roberto Sennen; Caccia, Massimo; Caravita, Ruggero; Castelli, Fabrizio; Cerchiari, Giovanni; Comparât, Daniel; Consolati, Giovanni; Demetrio, Andrea; di Noto, Lea; Doser, Michael; Fanì, Mattia; Ferragut, Rafael; Fesel, Julian; Fontana, Andrea; Gerber, Sebastian; Giammarchi, Marco G.; Gligorova, Angela; Guatieri, Francesco; Haider, Stefan; Hinterberger, Alexander; Holmestad, Helga Margrete; Kellerbauer, Alban; Khalidova, Olga; Krasnický, Daniel; Lagomarsino, Vittorio; Lansonneur, Pierre; Lebrun, Patrice; Malbrunot, Chloé; Mariazzi, Sebastiano; Marton, Johann; Matveev, Viktor A.; Mazzotta, Zeudi; Müller, Simon R.; Nebbia, Giancarlo; Nédélec, Patrick; Oberthaler, Markus K.; Pacifico, Nicola; Pagano, Davide; Penasa, Luca; Petráček, Vojtěch; Prelz, Francesco; Prevedelli, Marco; Ravelli, Luca; Rienaecker, Benjamin; Robert, Jacques C.; Røhne, Ole Myren; Rotondi, Alberto; Sandaker, Heidi; Santoro, Romualdo; Smestad, Lillian; Sorrentino, Fiodor; Testera, Gemma; Tietje, Ingemari C.; Widmann, Eberhard; Yzombard, Pauline; Zimmer, Christian; Zmeskal, Johannes; Zurlo, Nicola (Peer reviewed; Journal article, 2018)
      The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is a CERN based experiment with the central aim to measure directly the gravitational acceleration of antihydrogen. Antihydrogen atoms will be produced ...

    • Tracking down the route to the SM with inflation and gravitational waves 

      Chun, Eung Jin; Velasco-Sevilla, Liliana (Journal article; Peer reviewed, 2022)
      We explore supersymmetric SO(10) models predicting observable proton decay and various topological defects which produce different shapes and strengths of gravitational wave backgrounds depending on the scales of intermediate ...

    • Transduser med stabil åpningsvinkel over et stort frekvensområde. Design, konstruksjon og eksperimentelle målinger 

      Sæther, Mathias (Master thesis, 2009-11-14)
      Denne oppgaven tar sikte på å finne en mulig transduserkonstruksjon hvis hensikt er å lette arbeidet ved klassifisering av fiskesorter. Mer vil bli sagt om bakgrunn og motivasjon, men hovedmålet i denne oppgaven er å lage ...

    • Transient high latitude geomagnetic response to rapid increases in solar wind dynamic pressure 

      Madelaire, Michael; Laundal, Karl Magnus; Reistad, Jone Peter; Hatch, Spencer Mark; Ohma, Anders (Journal article; Peer reviewed, 2022-08-16)
      Rapid changes in solar wind dynamic pressure can produce a transient geomagnetic response in the high latitude ionosphere. In this study we carry out a superposed epoch analysis of the geomagnetic response based on 2,058 ...

    • Transition in Optical and Radio Features During the Early Development of Negative Intracloud Leader 

      Huang, Anjing; Cummer, Steven A.; Pu, Yunjiao; Chanrion, Olivier A.; Neubert, Torsten; Reglero, Victor; Østgaard, Nikolai (Journal article; Peer reviewed, 2022)
      What happens when the upward in-cloud (IC) breakdown transitions into horizontally expanding extension? Optical observations of this transition in IC lightning have not previously been reported. We identify the radio and ...

    • Transport and storage of CO2 in natural gas hydrate reservoirs 

      Ersland, Geir; Husebø, Jarle; Graue, Arne; Kvamme, Bjørn (Peer reviewed; Journal article, 2009-02)
      Storage of CO2 in natural gas hydrate reservoirs may offer stable long term deposition of a greenhouse gas while benefiting from methane production, without requiring heat. By exposing hydrate to a thermodynamically preferred ...