Sökning: "Terawatt laser"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden Terawatt laser.

1. 1. Laser-Driven Particle Acceleration - Improving Performance Through Smart Target Design

   Författare :Matthias Burza; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; wakefield; ultra-relativistic; ultra-intense; TNSA; Terawatt; sheath; proton; polarimetry; plasma mirror; plasma; Petawatt; particle; oscillation; Normarski; micromachining; LWFA; laser; interferometry; electron; contrast; acceleration; bubble; Fysicumarkivet A:2012:Burza;

   Sammanfattning : Laser-driven particle acceleration makes use of sub-picosecond, pulsed, high-power laser systems, capable of producing intensities ~10^{19} W/cm^2 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. LÄS MER

3. 2. Target and Laser Pulse Optimization for Laser-Driven Ion Acceleration

   Författare :Alexander Permogorov; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Terawatt laser; Target normal sheath acceleration; laser-driven ion acceleration; proton acceleration; double plasma mirror; Thomson parabola spectrometer; Fysicumarkivet A:2021:Permogorov;

   Sammanfattning : The research presented in this thesis is primarily focused on experimental investigations of laser-driven ion acceleration from solid targets via the target normal sheath acceleration mechanism. In particular, ways of optimizing the absorption of the laser pulse energy by free plasma electrons in the target, or modifying the shape of the accelerating electron sheath were addressed. LÄS MER

4. 3. Laser-Driven Plasma Waves for Particle Acceleration and X-ray Production

   Författare :Guillaume Genoud; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser plasma acceleration of electrons and protons; laser-wakefield acceleration; plasma waves; plasma-wiggler radiation; betatron radiation; laser guiding; laser pointing stabilisation;

   Sammanfattning : This thesis presents experimental results related to laser plasma accelerators. These rely on very different principles from conventional particle accelerators. LÄS MER

5. 4. Experiments on Laser-Based Particle Acceleration : Beams of Energetic Electrons and Protons

   Författare :Kristoffer Svensson; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; laser; plasma; acceleration; electrons; protons; Fysicumarkivet A:2016:Svensson;

   Sammanfattning : This thesis describes experiments involving laser-plasma-based acceleration of electrons and protons, using the techniques of laser wakefield acceleration (LWFA) and target normal sheath acceleration (TNSA). By using extremely high accelerating field strengths, up to the order of TV m-1, it is possible to reach high kinetic particle energies over very short distances. LÄS MER

7. 5. 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