Sökning: "ultraviolet light"

Visar resultat 16 - 20 av 144 avhandlingar innehållade orden ultraviolet light.

  1. 16. Extreme Ultraviolet Light Shaping and Spectroscopy through Opto-Optical Modulation

    Författare :Anna Olofsson; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  3. 17. Cataract from ultraviolet radiation in the mouse

    Författare :Linda Maren Meyer; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Lens; cataract; ultraviolet radiation; oxidative stress; mouse; light scattering;

    Sammanfattning : Cataract is defined as an opacification of the crystalline lens that results in visual impairment, Cataract is the number one cause of blindness in the world and there are currently no strategies to prevent it. Extraction of cataractogenous lenses is the most commonly performed surgical intervention in industrialized countries. LÄS MER

  4. 18. An Intense Attosecond Light Source - Towards Extreme Ultraviolet Pump-Probe Experiments

    Författare :Filippo Campi; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Attosecond; Femtosecond; Ultrashort; Ultrafast; High-order Harmonic Generation; pump probe; XUV; Fysicumarkivet A:2017:Campi;

    Sammanfattning : This thesis presents important steps towards performing high-intensity attosecond pump-probe experiments at the Lund high-intensity extreme ultraviolet (XUV) beamline, which followed two complementary paths: maximization of the XUV intensity available in the interaction region with a gas target, and providing attosecond temporal resolution.To maximize the energy of the XUV pulses generated via high-order harmonicgeneration (HHG), the macroscopic response of atoms to the driving infrared field was optimized. LÄS MER

  5. 19. Investigation of Ultrafast Molecular Dynamics via Covariance Mapping : A Tool for Intense XUV Light Sources

    Författare :Jan Lahl; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Covariance; Ultrafast; High-order harmonic generation; Extreme Ultraviolet; Pump probe; FLASH; Velocity map imaging; wavefront; FEL; photodissociation; Coulomb explosion; Fysicumarkivet A:2019:Lahl;

    Sammanfattning : The study of molecular dynamics involves observations of the motion of nuclei and electrons. While nuclear motion is usually on the picosecond or femtosecond timescale, attosecond precision is necessary to directly observe the motion of electrons. LÄS MER

  7. 20. Light interactions in flexible conjugated dyes

    Författare :Jonas Sjöqvist; Patrick Norman; Per-Olof Åstrand; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; force field; molecular dynamics; QM MM; solvation effects; absorption spectroscopy; fluorescence spectrosocopy; infrared spectroscopy; Raman spectroscopy; stokes shift; conjugated polyelectrolytes;

    Sammanfattning : In this thesis methodological developments have been made for the description of flexible conjugated dyes in room temperature spectrum calculations.The methods in question target increased accuracy and efficiency by combining classical molecular dynamics (MD) simulations with time-dependent response theory spectrum calculations. LÄS MER