Search for dissertations about: "ultrashort X-rays"
Showing result 1 - 5 of 8 swedish dissertations containing the words ultrashort X-rays.
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1. Creating and Probing Extreme States of Materials : From Gases and Clusters to Biosamples and Solids
Abstract : Free-electron lasers provide high intensity pulses with femtosecond duration and are ideal tools in the investigation of ultrafast processes in materials. Illumination of any material with such pulses creates extreme conditions that drive the sample far from equilibrium and rapidly convert it into high temperature plasma. READ MORE
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2. Sources and Diagnostics for Attosecond Science
Abstract : Ultrafast science refers to physical events that happen on the femtosecond (1 fs=10^-15 s) and attosecond (1 as=10^-18 s) timescales. Generation of attosecond pulses is usually achieved by interacting high-intensity femtosecond pulses with matter (typically gases), in a process called high-order harmonic generation (HHG). READ MORE
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3. Development and Applications of a Laser-Wakefield X-ray Source
Abstract : In laser-wakefield acceleration (LWFA), a femtosecond laser pulse is tightly focused in a gas to intensities exceeding 1018 W/cm2 . The laser radiation ionizes the medium and excites a plasma wave that travels behind the laser pulse. READ MORE
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4. Time-Resolved X-ray Diffraction Studies of Laser-Induced Dynamics in Solids
Abstract : X-ray diffraction is an invaluable tool in the field of structural dynamics. In the work described in this thesis, time-resolved X-ray diffraction experiments were carried out to investigate ultrafast lattice dynamics. READ MORE
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5. Time-Resolved Diffraction Studies of Structural Dynamics in Solids
Abstract : Studies of the structural dynamics of solids can improve our understanding of atomic motion in materials, and may thus help in the manufacture of new devices or the development of materials with novel structures and properties. Ultrashort laser pulses, a few tens of femtoseconds long, can deliver high energies (mJ–kJ). READ MORE