Recent Submissions

  • Thermally excited 630.0 nm emissions in the polar ionosphere 

    Kwagala, Norah Kaggwa (The University of Bergen, 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 ...
    Doctoral thesis
  • Seasonal and Solar Cycle Variations of Thermally Excited 630.0 nm Emissions in the Polar Ionosphere 

    Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad; Laundal, Karl Magnus (American Geophysical Union, 2018-08)
    Solar cycle and seasonal variations have been found in the occurrence of strong thermally excited 630.0 nm emissions in the polar ionosphere. Measurements from the European Incoherent Scatter Svalbard Radar have been used ...
    Journal article
  • Effect of Free Water Elimination on Diffusion Indices in Healthy Volunteers and Patients with Multiple Sclerosis 

    Berg, Emile Schjeldsøe (The University of Bergen, 2018-11-08)
    Diffusion tensor imaging (DTI) is a technique in magnetic resonance imaging (MRI) that can be used to image the brain microstructure beyond the resolution that is achievable using conventional imaging. By utilizing DTI, it ...
    Master thesis
  • Design of an Embedded Readout System for the ALOFT Gamma-Ray Detector Instrument 

    Heigre, Mats Fredrik (The University of Bergen, 2018-10-24)
    Birkeland Center for Space Science has proposed a campaign known as the Airborne Lightning Observatory for FEGS & TGFs (ALOFT) to study Terrestrial Gamma-Ray Flashes (TGFs). TGFs are the most energetic natural phenomena ...
    Master thesis
  • Design and Simulation of Pixel Layout and Data Processing Algorithms for the DEEP Instrument 

    Andersen, Hogne (The University of Bergen, 2018-10-17)
    A team of researchers at Birkeland Centre for Space Science is developing an instrument that is able to measure particle precipitation into the atmosphere. The instrument consist of both electron and proton detectors, hence ...
    Master thesis
  • Challenges and Strategic Research Plans for Earth and Heliosphere: Research Infrastructures, Projects and Initiatives 

    Mann, Ingrid; Kauristie, Kirsti; Bamford, Ruth; McCrea, Ian; Moen, Jøran Idar; Oksavik, Kjellmar; Yamauchi, Masanori; Johnsen, Magnar Gullikstad; Turunen, Esa (Cambridge University Press, 2018-07-24)
    We describe existing research infrastructures relevant for space weather and open issues of space weather research including the need for sustainable observation networks and for high-quality data products as basis for ...
    Journal article
  • Searches for transverse momentum dependent flow vector fluctuations in Pb-Pb and p-Pb collisions at the LHC 

    Acharya, Shreyasi; Adamová, Dagmar; Adolfsson, Jonatan; Aggarwal, Madan M.; Aglieri Rinella, G; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, N; Ahn, SU; Alme, Johan; Arsene, Ionut Christian; Bätzing, Paul Christoph; Djuvsland, Øystein; Dordic, Olja; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Langøy, Rune; Lardeux, Antoine Xavier; Lien, Jørgen André; Lindal, Svein; Lønne, Per-Ivar; Mahmood, Sohail Musa; Milosevic, Jovan; Nesbø, Simon Voigt; Nystrand, Joakim; Rehman, Attiq Ur; Richter, Matthias Rudolph; Røed, Ketil; Røhrich, Dieter; Skaali, Toralf Bernhard; Tambave, Ganesh Jagannath; Tveter, Trine Spedstad; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Wikne, Jon Christopher; Zhang, Hui; Zhao, Chengxin; Zhou, Zhuo; Zhu, Hongsheng; Qvigstad, Henrik; Aiola, Salvatore; Akindinov, Alexander; Alam, Sk Noor; Alba, José Luis Bazo; Aleksandrov, Dimitry; Allesandro, B.; ALICE, Collaboration (Springer, 2017-09)
    The measurement of azimuthal correlations of charged particles is presented for Pb-Pb collisions at $\sqrt{s_{\rm NN}}=$ 2.76 TeV and p-Pb collisions at $\sqrt{s_{\rm NN}}=$ 5.02 TeV with the ALICE detector at the CERN ...
    Journal article
  • W and Z boson production in p–Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV 

    Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, G; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, N; Ahn, SU; Alme, Johan; Altinpinar, Sedat; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Lønne, Per-Ivar; Mahmood, Sohail Musa; Milosevic, Jovan; Nystrand, Joakim; Qvigstad, Henrik; Rehman, Attiq Ur; Richter, Matthias Rudolph; Røed, Ketil; Røhrich, Dieter; Tveter, Trine Spedstad; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Wikne, Jon Christopher; Zhang, Hui; Zhao, Chengxin; Zhou, Zhuo; Zhu, Hongsheng; Langøy, Rune; Lien, Jørgen André; Aiola, Salvatore; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Allesandro, B.; Alexandre, D; Alfaro Molina, R; Alici, A; Alkin, A; ALICE, Collaboration (Springer, 2017-02)
    The W and Z boson production was measured via the muonic decay channel in proton-lead collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV at the Large Hadron Collider with the ALICE detector. The measurement covers backward ($-4.46 ...
    Journal article
  • Classical and quantum-mechanical scaling of ionization from excited hydrogen atoms in single-cycle THz pulses 

    Chovancova, Michaela; Aguen, H.; Rørstad, J. J.; Hansen, J. P. (The University of Bergen, 2017-08-25)
    Excited atoms, or nanotip surfaces, exposed to strong single-cycle terahertz radiation emit electrons with energies strongly dependent on the characteristics of the initial state. Here we consider scaling properties of the ...
    Journal article
  • Aspects of Electron Dynamics in Atoms Exposed to Single Cycle Electromagnetic Pulses 

    Chovancová, Michaela (The University of Bergen, 2018-06-29)
    This thesis covers the topic in atomic physics: Interaction of a strong external field with Rydberg hydrogen atom. In three scientific publications, we have targeted physical processes such as the field ionization in the ...
    Doctoral thesis
  • Low Salinity Waterflooding in Combination with Surfactant/Polymer. A Field Scale Simulation Study of Hybrid EOR 

    Pedersen, Vilde Loug (The University of Bergen, 2018-06-27)
    It is projected that 77% of energy consumption will originate from fossil fuels in 2040, indicating a continuous demand for crude oil [1]. Nevertheless, more than half of the hydrocarbons produced at present originate from ...
    Master thesis
  • Enhancing detectablility of tau-sneutrino signatures using machine learning 

    Alvestad, Daniel (The University of Bergen, 2018-06-27)
    In this thesis, the collider signatures of the scenario with a tau-sneutrino next-to-lightest supersymmetric particle (NLSP) at LHC are studied using machine learning. The parameter region of the non-universal Higgs masses ...
    Master thesis
  • High Harmonic Generation in Strongly Correlated Systems 

    Lysne, Markus (The University of Bergen, 2018-06-23)
    In recent years, the study of phenomena pertaining to non-linear properties of materials has seen a major upswing - especially in the context of High Harmonic Generation (HHG). In this thesis, an account of the current ...
    Master thesis
  • Ethernet-Based Control System and Data Readout for a Proton Computed Tomography Prototype 

    Bohne, Karl Emil Sandvik (The University of Bergen, 2018-06-23)
    At the University of Bergen (UiB), work is underway to develop a proton based computed tomography prototype. Proton CT (pCT) is an alternative to photonbased imaging that shows great promise as a technology for use in ...
    Master thesis
  • Beam diffraction effects in guided-wave transmission of fluid embedded elastic plate. Influence of receiver distance and finite aperture. 

    Midtbø, Simen Hammervold (The University of Bergen, 2018-06-23)
    For the past decades, plate transmission effects have been extensively studied with the incentive of applying the knowledge in GUW methods in the industry. With these studies, multiple anomalous effects have been ...
    Master thesis
  • Simulation Study of In-Situ Polymer Rheology in a Radial Flow Experiment 

    Sæther, Trude Sætnan (The University of Bergen, 2018-06-27)
    The global energy demand is continuously growing, and even though renewable energy sources are becoming increasingly important, oil remains the leading energy fuel to this date, accounting for ...
    Master thesis
  • Molecular dynamics study of water and carbon dioxide separation by means of nanotubes - A new method to capture CO2 

    Fimreite, Sjur Sato (The University of Bergen, 2018-08-30)
    Anthropogenic carbon dioxide (CO2) emissions are a huge concern these days. Arguably, but widely accepted, the apparent global climate changes are due to the increasing CO2 concentrations in the atmosphere. Carbon dioxide ...
    Master thesis
  • Measurement of the relative branching fraction B(B_s ^0 → ψ(2S)φ)/B( B_s^0→ J/ψφ ) with the ATLAS experiment at √s = 13 TeV. 

    Kolstø, Håkon Midthun (The University of Bergen, 2018-06-23)
    In this thesis we present the result of the relative branching fraction of the two hadronic B_s ^0 modes B_s ^0 → ψ(2S)φ and B_s ^0 → J/ψφ. In order to guarantee identical topologies we only look at the modes where J/ψ ...
    Master thesis
  • Mechanistic Modeling of Combined Low Salinity Waterflood and Surfactant- Polymer Flooding 

    Jarlsby, Diderik Olav (The University of Bergen, 2018-06-27)
    Flooding experiments have been made to investigating the effects of low salinity brine injection and the combined injection of low salinity surfactant and low salinity polymer solutions. These experiments have shown a ...
    Master thesis
  • Integration and design for the ALICE ITS readout chain 

    Mikkelsen, Gitle (The University of Bergen, 2018-06-26)
    ALICE and its Inner Tracking System detector in the LHC at CERN will undergo a major upgrade during its second long shutdown taking place in 2019 and 2020. New silicon sensors called ALPIDE will be utilized, which requires ...
    Master thesis

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