Viser 1-20 av 815

• #### Pressure Development in Dust Explosions - An experimental study in the 20-liter Siwek sphere and a 0.5 m³ non-standardized vessel ﻿

(The University of Bergen, 2018-07-27)
This thesis describes an experimental investigation of pressure development in dust explosions, using two different volumes. The 20-liter Siwek sphere is a standard explosion test apparatus used for determining maximum ...
Master thesis
• #### Noise and Cluster Size Studies of ALPIDE-CMOS Pixel Sensor for pCT ﻿

(The University of Bergen, 2018-07-04)
The use of proton beam has been introduced in medical physics for therapeutic purposes in cancer treatment and it has been proven much more efficient than conventional X-ray. Treatment planning in proton therapy is usually ...
Master thesis
• #### Characterization of the ALPIDE Detector with Proton Beams for the Development of a Prototype Computed Tomography Machine at the University of Bergen ﻿

(The University of Bergen, 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 ...
Master thesis
• #### Combined thickness and permittivity measurement of layers using an open-ended coaxial probe ﻿

(The University of Bergen, 2018-06-11)
The purpose of this thesis is to develop a method for estimating both the thickness and permittivity of layers simultaneously utilizing an open-ended coaxial probe. One possible application of this method is the detection ...
Master thesis
• #### A Digital Tracking Calorimeter for Proton Computed Tomography ﻿

(The University of Bergen, 2018-05-29)
Cancer is a destructive disease, in which tumor cells grow out-of-control, halting organ function. Its treatment is threefold: Radical surgery, chemotherapy and radiation therapy. Their relative usage is determined by ...
Doctoral thesis
• #### Investigation of Low Salinity Polymer and Surfactant Flooding in Carbonate Reservoir at Reservoir Conditions ﻿

(The University of Bergen, 2018-04-20)
It is estimated that 40-60% of the world’s total hydrocarbon production is from carbonate rocks [1]. Carbonate rocks contain the world`s largest fields in the Middle East (i.e., Ghawar Field, Saudi Arabia). Waterflooding ...
Master thesis
• #### Teknologi for MRI av hjernens funksjon og biokjemiske sammensetning ﻿

(The University of Bergen, 2018-04-07)
This thesis is divided into two parts. The first part addresses synchronisation between the rate of frequency the MR system used for fMRI examinations at Haukeland universitetssjukehus operates on (10 Mhz) and the sampling ...
Master thesis
• #### Nanostructured Materials for Solar Energy Applications ﻿

(The University of Bergen, 2018-03-23)
The work presented in this thesis focuses on nanostructures, and what effect parameters like size, material, and surroundings have on their physical properties, with special emphasis on optical properties. The motivation ...
Doctoral thesis
• #### Investigation of instability and turbulence effects on gas explosions: experiments and modelling ﻿

(The University of Bergen, 2018-03-09)
Safe design of industrial facilities requires models that can predict the consequences of accidental gas explosions in complex geometries with sufficient accuracy. Computa- tional fluid dynamics (CFD) models are widely ...
Doctoral thesis
• #### The ALICE Transition Radiation Detector: Construction, operation, and performance ﻿

(Elsevier, 2018-02)
The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD ...
Journal article
• #### How Often Do Thermally Excited 630.0 nm Emissions Occur in the Polar Ionosphere? ﻿

(American Geophysical Union, 2018-01)
This paper studies thermally excited emissions in the polar ionosphere derived from European Incoherent Scatter Svalbard radar measurements from the years 2000–2015. The peak occurrence is found around magnetic noon, where ...
Journal article
• #### Magnetic Resonance Imaging of Hydrate Phase Transitions in Sediments ﻿

(The University of Bergen, 2017-12-21)
Natural gas hydrates, simplified described as gas compressed in ice, are a substance existing in large quantities around the world. Their existence requires elevated pressures and low temperature. They are therefore found ...
Master thesis
• #### Anisotropic reflectance of Arctic snow and sea ice ﻿

(The University of Bergen, 2017-12-21)
We present an investigation of the angular distribution of reflected light on snow and sea ice, for three selected wavelengths; 500, 800 and 1100 nm. Our analysis covers how the angular reflectance distribution is affected ...
Master thesis
• #### Mass Ordering of Third Generation Sleptons in a Trilinear-Augmented Gaugino Mediated Supersymmetry-Breaking Scenario ﻿

(The University of Bergen, 2017-12-21)
In this thesis, we are exploring the particle spectrum of trilinear-augmented gaugino mediation. In particular, we calculate the masses of the stau and the tau sneutrino in a section of the parameter space in which one is ...
Master thesis
• #### Kaon femtoscopy in Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV ﻿

(Elsevier, 2017-12-21)
We present the results of three-dimensional femtoscopic analyses for charged and neutral kaons recorded by ALICE in Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV. Femtoscopy is used to measure the space-time ...
Journal article
• #### Rotation and Polarization in Heavy Ion Collisions ﻿

(The University of Bergen, 2017-12-19)
Doctoral thesis
• #### J/$\psi$ elliptic flow in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV ﻿

(American Physical Society, 2017-12-15)
We report a precise measurement of the J/$\psi$ elliptic flow in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV with the ALICE detector at the LHC. The J/$\psi$ mesons are reconstructed at mid-rapidity ($|y| < 0.9$) ...
Journal article
• #### Application of MRI in studies of tetrahydrofuran hydrates in quartz sand at atmospheric pressure ﻿

(The University of Bergen, 2017-12-06)
Natural gas hydrates form under low temperatures and high pressures. They can be found in abundance in permafrost environments and under the sea floor, where the temperature and pressure conditions ensure their stability. ...
Master thesis
• #### Highlights of experimental results from ALICE ﻿

(Elsevier, 2017-11)
Highlights of recent results from the ALICE collaboration are presented. The collision systems investigated are Pb–Pb, p–Pb, and pp, and results from studies of bulk particle production, azimuthal correlations, open and ...
Journal article
• #### Event activity-dependence of jet production in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV measured with semi-inclusive hadron+jet correlations by ALICE ﻿

(Elsevier, 2017-11)
We report measurement of the semi-inclusive distribution of charged-particle jets recoiling from a high transverse momentum ($p_{\rm T}$) hadron trigger, for p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV, in p-Pb events ...
Journal article