Now showing items 21-28 of 28

    • Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions 

      Chavez Panduro, Elvia Anabela; Cordonnier, Benoit; Gawel, Kamila; Børve, Ingrid; Iyer, Jaisree; Carroll, Susan; Michels, Leander; Rogowska, Melania; McBeck, Jessica Ann; Sørensen, Henning; Walsh, Stuart; Renard, Francois; Gibaud, Alain; Torsæter, Malin; Breiby, Dag Werner (Peer reviewed; Journal article, 2020)
      Depleted oil reservoirs are considered a viable solution to the global challenge of CO2 storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO2. Under reservoir conditions, ...
    • Reconstructing surface morphology using coherent X-ray diffraction combined with iterative phase retrieval algorithms 

      Karud, Elisabeth Bruun (Master thesis, 2019)
      Inversjon av spredningsdata er et omfattende problem i røntgenfysikk og gir opphav til faseproblemet. I spredningseksperimenter blir bare intensiteten målt, mens faseinformasjonen er tapt. Rekonstruering av spredningsobjektet ...
    • Simulations of X-ray Propagation in Guiding Structures and Light Scattering From Coccoliths Using Finite Difference Methods 

      Kleiven, David (Master thesis, 2017)
      This thesis consists of two major parts. First, future applications of waveguides in the X- ray regime has been studied numerically. The second part is devoted to the study of light scattering from calcite shells from ...
    • A technique for in situ X-ray computed tomography of deformation-induced cavitation in thermoplastics 

      Olufsen, Sindre Nordmark; Tekseth, Kim Robert Bjørk; Breiby, Dag Werner; Clausen, Arild Holm; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2020)
      Deformation-induced cavitation influences the mechanical response of polymeric materials, but acquiring in situ measurements of the spatial evolution of cavities has typically necessitated the use of synchrotron radiation ...
    • Tuning and Tracking of Coherent Shear Waves in Molecular Films 

      Lemke, Henrik Till; Breiby, Dag Werner; Ejdrup, Tine; Hammershøj, Peter; Cammarata, Marco; Khakhulin, Dmitry; Rusteika, Nerijus; Adachi, Shin-Ichi; Koshihara, Shinya; Kuhlman, Thomas Scheby; Mariager, Simon Oddsson; Nielsen, Thomas Nørskov; Wulff, Michael; Sølling, Theis Ivan; Harrit, Niels; Feidenhans'l, Robert; Nielsen, Martin Meedom (Journal article; Peer reviewed, 2018)
      in films as response to femtosecond and picosecond laser pulse heating by timeresolved X-ray diffraction. This method allows a direct absolute determination of the molecular displacements induced by electron−phonon interactions, ...
    • X-ray computed tomography investigation of dilation of mineral-filled PVC under monotonic loading 

      Olufsen, Sindre Nordmark; Clausen, Arild Holm; Breiby, Dag Werner; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2019)
      The deformation-induced dilation of mineral-filled polyvinyl chloride (PVC) is investigated by means of polychromatic X-ray absorption tomography (XCT). Axisymmetric notched tensile specimens are strained to prescribed ...
    • X-ray nanoscopy of a bulk heterojunction 

      Patil, Nilesh; Skjønsfjell, Eirik Torbjørn Bakken; Van den Brande, Niko; Chavez Panduro, Elvia Anabela; Claessens, Raf; Guizar-Sicairos, Manuel; Van Mele, Bruno; Breiby, Dag Werner (Journal article; Peer reviewed, 2016)
      Optimizing the morphology of bulk heterojunctions is known to significantly improve the photovoltaic performance of organic solar cells, but available quantitative imaging techniques are few and have severe limitations. ...
    • X-ray Scattering Study of Nanostructured GaSb Surfaces 

      Døli, Ellen (Master thesis, 2013)
      In this thesis the surface structure of a sample consisting of slightly tilted, denselypacked Gallium-Antimonide (GaSb) nanocones, self-assembled through Ion Beam Sputtering(IBS) is investigated with a selection of X-ray ...