Sökning: "X-ray lasers"

Visar resultat 16 - 20 av 69 avhandlingar innehållade orden X-ray lasers.

  1. 16. Advances in Biomolecular Imaging with X-ray Free-Electron Lasers

    Författare :Christofer Östlin; Carl Caleman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; XFEL; serial femtosecond x-ray crystallography; single particle imaging; radiation damage; GROMACS; Cretin; computer simulation;

    Sammanfattning : Utilizing X-rays to solve molecular structures has proven to be an immensely powerful and im- portant scientific technique. The invention of X-ray crystallography has allowed for countless breakthroughs in chemistry, biology and material science and remains the number one method used for structural determination today. LÄS MER

  3. 17. Laser-driven beams of fast ions, relativistic electrons and coherent x-ray photons

    Författare :Olle Lundh; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plasma Acceleration of Electrons and Ions; Advanced Accelerator Concepts; X-ray Lasers; Intense Beams and Radiation Sources; Intense Laser-Plasma Interactions;

    Sammanfattning : This thesis presents experimental results on the development and optimization of novel and highly compact sources of beams of fast ions, relativistic electrons and coherent x-rays, driven by intense laser-plasma interactions. The rapid development of high-power, short-pulse laser systems have made available peak powers reaching the petawatt regime and focused intensities reaching 10^21 W/cm2. LÄS MER

  4. 18. Small-Angle X-ray Scattering on Micrometer-Sized Water Droplets using X-ray lasers

    Författare :Alexander Späh; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; kemisk fysik; Chemical Physics;

    Sammanfattning : .... LÄS MER

  5. 19. Laser-Matter Interactions at Extreme Irradiance: X-ray Generation and Relativistic Channelling

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

    Sammanfattning : 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. LÄS MER

  7. 20. Towards Single Molecule Imaging - Understanding Structural Transitions Using Ultrafast X-ray Sources and Computer Simulations

    Författare :Carl Caleman; Janos Hajdu; Richard Neutze; Uppsala universitet; []
    Nyckelord :Molecular biophysics; XFEL; Ultrafast Melting; InSb; Molecular Dynamics; Water Cluster; Evaporation; Secondary Electron; Photo-cathode; Electron Scattering; Energy Loss Function; Single Particle Imaging; X-ray Diffraction; Water; Ice; KI; CsI; Molekylär biofysik;

    Sammanfattning : X-ray lasers bring us into a new world in photon science by delivering extraordinarily intense beams of x-rays in very short bursts that can be more than ten billion times brighter than pulses from other x-ray sources. These lasers find applications in sciences ranging from astrophysics to structural biology, and could allow us to obtain images of single macromolecules when these are injected into the x-ray beam. LÄS MER