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Showing 1 to 15 of 15 for “"laser-produced plasma"”.
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Characterisation and Measurement of Laser Produced Plasma Emission and Applications in Opacity Experiments
… this thesis investigates the characterization of laser produced plasmas and develops applications in opacity experiments using plasma emission as a back-lighting source. A diagnostic is developed to analyse bremsstrahlung emission from hot electrons produced in the laser plasma interaction. …
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Kelvin-Helmholtz Instability in Magnetized Plasma
… physics. In one type of experiment, with a laser produced plasma expanding in an external magnetic field, we observed the Kelvin-Helmholtz instability growing at the plasma-field boundary, where a velocity gradient perpendicular to the plasma velocity forms. The magnetized Kelvin-Helmholtz …
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Particle simulation of laser-produced plasmas on the basis of analytic magnetohydrodynamic solutions
Inertial confinement fusion experiments using laser beams have reported the emission of hot electrons in large quantities. This phenomenon has been one of the major hindrances to the efficient compression of a thermonuclear target. This, however, leads to the speculation of a number of non-fusion …
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Rare gas alkali ionic excimers
… been investigated by soft x-ray excitation in a laser-produced plasma and by high energy pulsed electron beam pumping in this work. Soft x-ray pumping of XeF(B $\to$ X) and (XeRb)$\sp{+}$ yielded the first observation of excimer molecules formed by reactive kinetics in a laser-produced plasma. …
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Laser plasma particle velocities
Experiments were performed on laser produced plasma from aluminum target discs in a vacuum chamber at pressures a few times 10(-6) torr. Plasma analysis was achieved using a floating double electrostatic probe of tungsten wires biased at -15 volts DC. In analyzing 376 oscilloscope trace pictures of …
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The far-ultraviolet spectroscopy of molecules of astrophysical interest
… D$_{2}$O at 415$\AA$. Both a synchrotron and a laser produced plasma continuum source were used for absorption measurements and the advantages of each source were compared. Experiments were undertaken to examine the radiation properties of laser produced plasmas with a view to their general use …
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Microwave Interferometric Measurements of Electron Density in Laser-Generated Plasma Channels
… decay of the absolute electron density in a laser-produced plasma channel have been made with a 9.2~Ghz microwave interferometer. The plasma channels were generated by sub-picosecond laser pulses ($\lambda=$248~nm, 40~mJ per pulse) produced by a hybrid Ti:sapphire/KrF excimer amplifier …
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The role of nanostructured targets in Laser-Produced Plasmas for Nuclear Astrophysics studies
… PhD thesis documents the experimental study of plasmas produced from the interaction of a high-power laser in ns domain with nanostructured materials compared with ordinary bulk target. The study is focused on the effect of solid targets with different physical and geometric characteristics, and …
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Theoretical and Experimental Studies of Radiation from Z-Pinch Complex Wire Arrays and Applications
In the research area of high energy density plasmas an ever increasing goal is searching for higher efficient radiators, particularly in z-pinch plasmas, and their applications. This goal is a major focus of this dissertation and implements both theoretical and experimental tools in the process. …
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Hydrogen surface wave plasma cleaning of the EUV collector
… standard of 193 nm light from an excimer laser has been manipulated through techniques such as multiple pattern or immersion lithography to reduce the wavelength and size of the features on the transistor. Going forward, a new technique, extreme ultraviolet (EUV) lithography, is being …
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Debris Characterization And Mitigation Of Droplet Laser Plasma Sources For Euv Lithography
… for this wavelength is derived from a hot-dense plasma produced by either a gas discharge or a laser. This study concentrate only on the laser produced plasma source because of its advantages of scalability to higher repetition rates. The design of a the laser plasma EUVL light source consists of …
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Weakly collisional electrostatic simulations for laboratory astrophysics applications
Modern plasma physics research is increasingly realizing the potential for cutting edge laser-produced plasma experiments to be exploited in order to investigate astrophysically relevant phenomena. Of particular interest are collisionless shocks, and the physics of the weakly collisional regime …
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Removal of tin from exterme ultraviolet collector optics by an in-situ hydrogen plasma
… the light source has been the 193nm ArF excimer laser. While the industry has managed to keep up with Moore’s Law, shrinking feature sizes without shrinking the lithographic wavelength has required extra innovations and steps that increase fabrication time, cost, and error. These innovations …
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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. …