Blar i Department of Physics and Technology på tittel
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Characterising Mesoscale Fast Flow Channels in the Polar Cap Ionosphere
(Doctoral thesis, 2021-01-22)The large-scale ionospheric convection that circulates in the high-latitude polar caps was initially assumed to be a smooth, laminar flow. However, it has now come to light that this is an oversimplified understanding of ... -
Characteristics and Meteorological Environment of Terrestrial Gamma-ray Flashes
(Doctoral thesis, 2021-05-28)This thesis investigates the geographic and meteorological conditions in which Terrestrial Gamma-ray Flashes (TGFs) are produced. TGFs are submillisecond bursts of gamma radiation produced inside thunderclouds in association ... -
Characteristics of fragmented aurora-like emissions (FAEs) observed on Svalbard
(Journal article; Peer reviewed, 2021)This study analyses the observations of a new type of small-scale aurora-like feature, which is further referred to as fragmented aurora-like emission(s) (FAEs). An all-sky camera captured these FAEs on three separate ... -
Characteristics of the flank magnetopause: Cluster observations
(Peer reviewed; Journal article, 2014-11)The magnetopause is a current sheet forming the boundary between the geomagnetic field on one side and the shocked solar wind on the other side. This paper discusses properties of the low-latitude dawn and dusk flanks of ... -
Characteristics of the Flank Magnetopause: MMS Results
(Journal article; Peer reviewed, 2020)We have used a large number of magnetopause crossings by the Magnetospheric Multiscale (MMS) mission to investigate macroscopic properties of this current sheet, with emphasis on the flanks of the magnetopause. Macroscopic ... -
Characteristics of the Flank Magnetopause: THEMIS Observations
(Peer reviewed; Journal article, 2019-05-30)The terrestrial magnetopause is the boundary that shields the Earth's magnetosphere on one side from the shocked solar wind and its embedded interplanetary magnetic field on the other side. In this paper, we show observations ... -
Characterization and application of 3D silicon microdosimeters
(Doctoral thesis, 2020-12-11)The effect of ionizing radiation on biological matter differs significantly between the various types of radiation. For the same amount of absorbed energy, some forms of radiation are much more effective in inducing ... -
Characterization and correction of errors in measured inherent optical properties: Multiple scattering errors in LISST-VSF measurements
(Doctoral thesis, 2023-11-28)Viktigheten av nøyaktige målinger av interaksjoner mellom lys og partikler i marine miljøer har økt de siste årene grunnet den økende interessen for miljøovervåkning, satellittmålinger, og trådløs optisk undervannskommunikasjon. ... -
Characterization of a neutral helium beam for helium microscopy
(Master thesis, 2015-06-29)Neutral helium beam microscopy is a new development in scientific instrumentation where neutral helium atoms are utilized to image a sample. The main advantage of using neutral helium is the significantly smaller energy ... -
Characterization of Associating Polymer (AP) Solutions. Influences on flow behavior by the degree of hydrophobicity and salinity
(Master thesis, 2013-06-02)The most applied polymer today for chemical improved oil recovery (IOR) processes, such as polymer flood and/or polymer well treatments, is the synthetic partially hydrolyzed polyacrylamide (HPAM) and its derivatives. ... -
Characterization of boron-coated silicon sensors for thermal neutron detection
(Journal article; Peer reviewed, 2020)Silicon neutron detectors can operate at low voltage and come with ease of fabrication and the possibility of integration of readout electronics and thus are attractive from an application point of view. In this paper, we ... -
Characterization of Hyper Spectral Irradiance and Radiance Sensors
(Master thesis, 2013-09-11)It is surprisingly problematic to to accurately measure light in the laboratory. Even more so when measuring in the field. There are lots of areas where measuring light spectrum and irradiance outside a laboratory is of ... -
Characterization of monolithic CMOS pixel sensor chip with ion beams for application in particle computed tomography
(Peer reviewed; Journal article, 2019)Particle computed tomography (pCT) is an emerging imaging modality that promises to reduce rangeuncertainty in particle therapy. The Bergen pCT collaboration aims to develop a novel pCT prototype basedon the ALPIDE monolithic ... -
Characterization of the ALPIDE chip with Helium-4 ions for Proton Computed Tomography
(Master thesis, 2018-12-06)Particle therapy has become an appealing therapeutic option for patients with various tumor types. The physical properties of charged particles allow for an improved dose distribution conformality compared to conventional ... -
Characterization of the ALPIDE Detector with Proton Beams for the Development of a Prototype Computed Tomography Machine at the University of Bergen
(Master thesis, 2018-07-04)In conventional radio therapy, photons is used in the treatment. Treatment with protons, however, greatly reduce the energy which is deposited in healthy tissue surrounding the tumor. The aim for the pCT group at the ... -
Characterization of Thunderstorm Cells Producing Observable Terrestrial Gamma-Ray Flashes
(Journal article; Peer reviewed, 2023)The meteorological conditions required for the production of Terrestrial Gamma-ray Flashes (TGFs) are not well understood. Particularly, the link between TGF production, meteorology, and weather severity is poorly characterized ... -
Characterization studies of a GEM detector prototype for the ALICE TPC upgrade for LHC Run 3 and beyond
(Master thesis, 2016-11-21)The multiwire proportional chamber signal readout of the ALICE Time Projection Chamber (TPC) will be replaced by Gas Electron Multiplier (GEM) detectors to meet the new requirements due to higher collision rate and energies ... -
Characterizing the initial conditions of heavy-ion collisions at the LHC with mean transverse momentum and anisotropic flow correlations
(Journal article; Peer reviewed, 2022)Correlations between mean transverse momentum [pT] and anisotropic flow coefficients v2 or v3 are measured as a function of centrality in Pb–Pb and Xe–Xe collisions at sNN=5.02 TeV and 5.44 TeV, respectively, with ALICE. ... -
Charge correlations using the balance function in Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV
(Peer reviewed; Journal article, 2013-06)In high–energy heavy–ion collisions, the correlations between the emitted particles can be used as a probe to gain insight into the charge creation mechanisms. In this article, we report the first results of such studies ... -
Charge separation relative to the reaction plane in Pb-Pb collisions at \(\sqrt{s_{NN}}\)= 2.76 TeV
(Peer reviewed; Journal article, 2013-01)Measurements of charge dependent azimuthal correlations with the ALICE detector at the LHC are reported for Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV. Two- and three-particle charge-dependent azimuthal correlations ...