Search for dissertations about: "types of laser"

Showing result 6 - 10 of 189 swedish dissertations containing the words types of laser.

  2. 6. Experiments on Laser-Based Particle Acceleration : Beams of Energetic Electrons and Protons

    Author : Kristoffer Svensson; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; laser; plasma; acceleration; electrons; protons; Fysicumarkivet A:2016:Svensson;

    Abstract : This thesis describes experiments involving laser-plasma-based acceleration of electrons and protons, using the techniques of laser wakefield acceleration (LWFA) and target normal sheath acceleration (TNSA). By using extremely high accelerating field strengths, up to the order of TV m-1, it is possible to reach high kinetic particle energies over very short distances. READ MORE

  4. 7. Laser treatment in glaucoma : efficacy and safety

    Author : Erika Rasmuson; Gauti Jóhannesson; Christina Linden; Björn Lundberg; Mika Harju; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; glaucoma; laser treatment; intraocular pressure; glaucoma treatment; glaukom; laserbehandling; ögontryck; glaukombehandling; oftalmiatrik; ophthalmology; oftalmiatrik; ophthalmology;

    Abstract : Glaucoma is a progressive optic neuropathy and the major cause of irreversible blindness worldwide. Although the pathogenesis of glaucoma is not completely understood, the most important risk factor for development and progression of the disease is an elevated intraocular pressure (IOP). READ MORE

  5. 8. Laser Diagnostic Techniques with Ultra-High Repetition Rate for Studies in Combustion Environments

    Author : Jimmy Olofsson; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; High-Speed; High Repetition Rate; LIF; PLIF; 3D Visualisation; Engine; Teknik; Technological sciences; Fysik; Physics; Combustion; Laserteknik; Laser technology; Laser-Induced Fluorescence; Laser Diagnostics;

    Abstract : When conducting laser based diagnostics in combustion environments it is often desirable to obtain temporally resolved information. This can be due to several factors such as combustion taking place in a turbulent flow field, flame propagation from a spark plug in an initially quiescent combustible mixture, or rapid, multi-point fuel consumption in a homogeneous charge as a result of compression ignition in an engine cycle. READ MORE

  6. 9. Process monitoring and analysis of laser welding and of milling

    Author : Peter Norman; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Manufacturing Systems Engineering; Produktionsutveckling;

    Abstract : Defects during fabrication of a part can implicate large costs for the manufacturer. In industry they use several types of measurement platforms/sensors to try to make the process more stable and detect when a defect is happening or has happened. READ MORE

  7. 10. Further development of NICE-OHMS : – an ultra-sensitive frequency-modulated cavity-enhanced laser-based spectroscopic
 technique for detection of molecules in gas phase

    Author : Patrick Ehlers; Ove Axner; Joakim Bood; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NICE-OHMS; Frequency Modulation; Cavity Enhancement; Molecular Spectroscopy; fysik; Physics;

    Abstract : Noise-immune cavity-enhanced optical heterodyne molecular spectroscopy, NICE-OHMS, is a laser-based spectroscopic detection technique that comprises the concepts of frequency modulation (FM, for reduction of 1/f-noise by detecting the signal at a high frequency) and cavity enhancement (CE, for a prolongation of the optical path length) in a unique way. Properly designed, this gives the technique an intrinsic immunity against the frequency-to-noise conversion that limits many other types of CE techniques. READ MORE