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 12 of 12 for “"ultra-intense"”.
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Effects of Radiation Damping in Extreme Ultra-intense Laser-Plasma Interaction
Recent advances in the development of intense short pulse lasers are significant. Now it is available to access a laser with intensity 1021 W/cm2 by focusing a petawatt class laser. In a few years, the intensity will exceed 1022 W/cm2, at which intensity electrons accelerated by the laser get …
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Radiation generation and high-field physics phenomena in ultra-intense laser-solid interactions
… investigations of the radiation produced via ultra-intense laser-solid interactions. Laser intensities in the range 10exp18−10exp24 Wcm−2 are explored, enabling these interactions to be investigated at current laser facilities (at the lower end of this intensity range), and predictions to be …
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Selective Deuteron Acceleration using Target Normal Sheath Acceleration
… to multi-MeV energies after irradiation with an ultra-intense laser. The versatility of an ion beam for the generation of neutrons can be improved by tailoring which ions are accelerated. Nominally, the dominant species accelerated is the lightest present on a target surface typically …
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Radiation reaction in strong fields from an alternative perspective
… reaction effects on a particle colliding with an ultra-intense laser pulse we show that the regime where there is a significant deviation of these two approaches can never be reached with existing or proposed laser facilities. The methods used to explore single particle interaction with an intense …
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Numerical models for the simulation of Raman amplification in plasma
… in plasma is a potential method of producing ultra-short, ultra-intense laser pulses. As amplification in realistic systems involves many competing nonlinear processes, numerical simulations are often used to better understand the associated complex behaviour. Different models offer different …
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Fast-ion spectrometry of ICF implosions and laser-foil experiments at the omega and MTW laser facilities
… performance. Finally, fast-ion generation by ultra-intense lasers has also been studied using planar targets. The mean and maximum energies of protons and heavy ions has been measured, and it has been shown that a two-temperature hot-electron distribution affects the energies of heavy ions and …
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Effects of Laser Frequency and Multiple Beams on Hot Electron Generation in Fast Ignition
… to about a thousand times solid density with ultra-intense lasers. In the fast ignition (FI) scheme, a picosecond petawatt laser pulse is used to deposit ∼10 kJ of energy in ∼10 ps into a small hot-spot at the periphery of the compressed core, igniting a fusion burn wave. FI promises a …
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Experimental Studies of Radiation Reaction and Photon-Photon Collisions in Ultrahigh Intensity Regimes
… the combination of laser-plasmaaccelerators and ultra-intense field capabilities in the same experimental facility. <br/><br/>The first of the experimental findings was the observation of non-perturbative Radiation Reaction effects in the collision of an electron beam of energy exceeding 2 GeV …
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Self-generated magnetic fields in intense laser-solid interactions relevant to relativistic plasma astrophysics
… reports on self-generated magnetic fields in ultra-intense laser interactions with dense plasma and the role that these play in the dynamics of relativistic electrons, and, subsequently, ion acceleration. This includes an investigation of resistive magnetic fields generated within solids and …
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Collective charged particle dynamics in relativistically transparent laser-plasma interactions
… of electrons and ions to the interaction of ultra-intense (10²⁰ Wcm⁻²) laser with ultra-thin (nanometre scale) foils undergoing expansion and relativistic induced transparency. The onset of this relativistic mechanism is also characterised and studied in detail. This new insight into …
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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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Laser-Driven Particle Acceleration - Improving Performance Through Smart Target Design
… at the laser focus to form plasmas, and use ultra-relativistic and nonlinear dynamics to produce quasistatic acceleration fields. This allows electrons to be accelerated to ~100 MeV over sub-centimetre distances, while protons may be accelerated to the ~10 MeV regime. In addition, novel …