Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"laser-matter interactions"”.
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Intense laser matter interactions for explosives detection and tunable spectral blueshift
… shifts induced in metal surfaces by ultrafast laser pulses at intensities ranging from 1013 to 1014 W/cm2. These ~100 femtosecond (fs) pulses facilitate non-resonant vaporization of explosives, enabling non-contact sampling and detection. When coupled with electrospray post-ionization, fs laser …
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Laser-Matter Interactions at Extreme Irradiance: X-ray Generation and Relativistic Channelling
… 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. …
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Generation of ultra-bright MeV gamma-ray beams from intense laser-matter interactions
… such as pulsars. Using relativistically-intense laser pulses, it is possible to produce high-flux high-energy photon beams in an all optical arrangement. This thesis will provide a working theory of what plasmas and lasers are and how energy from lasers couples into plasmas; before a discussion …
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Exotic Species of Hydrogen
… processes of the negative Hydrogen ion in strong laser-field regimes. A Keldysh-Faisal-Reiss theory allows semiclassical interpretations of complex ionization mechanisms in strong laser-fields due to its conformity with the Feynman path integral formalism. We employ a new kind of photoelectron …
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Measurement And Characterization Of Microwave Transient Electromagnetic Fields Generated From Laser/matter Interaction
… past experiments conducted with high intensity lasers, it has been known for some time that laser matter interactions result in the emission of short, transient electromagnetic pulses. Previous investigations into laser generated electromagnetic pulses provide basic information regarding …
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Direct Ion-Temperature Measurements Using High-Resolution Inelastic X-ray Scattering
… nonequilibrium states generated by short-pulse laser-matter interactions. In such states, electrons can reach multi-eV temperatures while the lattice remains essentially unchanged. Understanding the dynamics of non-equilibrium HED systems is critical for laboratory astrophysics, materials …
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A Study of Infrared Femtosecond Laser Irradiation on Monolayer Graphene on SiO2/Si Substrate
… sensors. This thesis focuses on the femtosecond laser processing of graphene from both scientific and industrial points of view. Started from the manufacturing process, a new manufacturing route for graphene devices based on a femtosecond laser system is explored. In this thesis, the graphene …
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Increased Proton Energies - Above the ~ 60 MeV Empirical Barrier, from High-Contrast High-Intensity Short-Pulse Laser-Interactions with Micro-Cone Targets
Ultra-high intensity lasers enable the investigation of extreme states of matter and the study of high energy density physics in the laboratory, as well as the creation of various intense radiation sources, i.e. electrons, X-rays, and ions. Of particular interest to this dissertation is the …
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Novel diagnostic techniques for investigations into energy and matter transport in dynamic systems
Light-matter interactions are fundamental to many technologies used today. They are complex, non-linear processes sensitive to the properties of the source, material, mechanisms, and environment in which they interact. In order to control a process, its key features must be measurable and …