Search for dissertations about: "Laser diagnostic"

Showing result 21 - 25 of 94 swedish dissertations containing the words Laser diagnostic.

  2. 21. Laser-Matter Interactions at Extreme Irradiance: X-ray Generation and Relativistic Channelling

    Author : Anders Sjögren; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; relativistic self-focusing; particle acceleration; x-ray generation; radiography; Laserteknik; Laser technology; laser-produced plasma; light scattering; Fysicumarkivet A:2002:Sjögren;

    Abstract : This thesis summarizes experimental work in which the powerful Ti:sapphire lasers at the High Power Laser Facility at the Lund Laser Centre have been employed to investigate laser-produced X-rays and relativistic channelling. These lasers produce short pulses, of the order of 50 fs, with energies ranging from 1 mJ to 1 J. READ MORE

  4. 22. Photodynamic therapy and laser-based diagnostic studies of malignant tumours

    Author : Ingrid Wang; Medicinskt lasercentrum; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; protoporphyrin IX PpIX ; delta -aminolevulinic acid ALA ; photosensitizer; basal cell carcinoma BCC ; Photodynamic therapy PDT ; laser-induced fluorescence LIF ; Cytology; oncology; cancerology; Cytologi; onkologi; cancer;

    Abstract : Two non-thermal regimens of light interaction with biological tissue, that are in a natural way connected, are discussed in the present thesis. These are photodynamic therapy (PDT) for the treatment of malignant tumours and laser-induced fluorescence (LIF) for tissue characterization. READ MORE

  5. 23. Multi-Dimensional Quantitative Laser-based Diagnostics - Development and Practial Applications

    Author : Rikard Wellander; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Post injection; Structured illumination; Mie scattering; Dense sprays; Extinction coefficient; Signal attenuation; Laser extinction; Multiple scattering; Scattering measurements; Planar laser induced fluorescence; Time resolved; Imaging through turbulent media; Three-dimensional image acquisition; Diesel particulate filter regeneration; Wall impingent; Biodiesel; LII; Large-bore gas Engine; Pre-chamber ignition; Fysicumarkivet A:2014:Wellander;

    Abstract : Laser based optical diagnostic methods are routinely used in combustion research. Many of the more common approaches are based on illuminating a cross-section of the sample with a thin laser sheet. For example, by targeting an electronic transition in a molecule, its concentration within the plane illuminated by the laser sheet can be deduced. READ MORE

  6. 24. Development and application of photofragmentation laser-induced fluorescence for visualization of hydrogen peroxides

    Author : Olof Johansson; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Flame diagnostics; Fluorescence lifetime imaging; Hydrogen peroxide; Laser diagnostics; Laser-induced fluorescence; Photofragmentation;

    Abstract : The work presented in this thesis is mainly motivated by the need for an optical diagnostic technique which can be used to visualize hydrogen peroxide (H2O2) in its gas phase. Due to the lack of bound electronic states, H2O2 cannot be detected using laser-induced fluorescence based on electronic excitation. READ MORE

  7. 25. Collisional effects and attosecond diagnostics in laser-generated plasmas

    Author : Andréas Sundström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; electrostatic shocks; plasma physics; plasma diagnostics; laser-plasmas; attosecond pulses; extreme-ultraviolet; Coulomb collisions;

    Abstract : When matter is radiated by laser light of extreme intensity, it is rapidly ionized, thereby forming a plasma. Such laser-generated plasmas can be used as sources of energetic particles and radiation, or to study astrophysically relevant phenomena in the laboratory and the behavior of matter under extreme conditions. READ MORE