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Showing 1 to 20 of 41 for “"laser 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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Collective charged particle dynamics in relativistically transparent laser-plasma interactions
… 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 relativistic transparency is an …
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EMP mitigation and novel detection strategies for laser-plasma experiments
Laser driven particle and radiation sources have the potential to become an alternative to conventional accelerators for a number of applications. Many laser-driven sources have been demonstrated, including x-rays, protons, electrons and positrons. The laser driven production of exotic particles …
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Bremsstrahlung radiation and fast electron transport in laser-plasma interactions
… using high-intensity (> 1018W/cm2) lasers pulses to ionise and accelerate electrons from thick solid targets in order to generate a bright bremsstrahlung source. Throughout the work the focus has been, firstly, to better understand the process behind the generation of x-rays within …
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Investigation and characterization of single hot spot laser-plasma interactions
Control of parametric laser-plasma interactions (LPI) is essential to the success of inertial confinement fusion (ICF). Through a research collaboration with the Los Alamos National Laboratory (LANL), we have had the opportunity to participate in world-class laser-plasma experiments. The goal of …
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Effects of Radiation Damping in Extreme Ultra-intense Laser-Plasma Interaction
… 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 energy more …
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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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On The Origin of Super-Hot Electrons in Intense Laser-Plasma Interactions
This thesis investigates the ultraintense laser-plasma interaction. An experiment to measure the generation of relativistic electrons and positrons was performed at the Texas Petawatt laser which resulted in the observation of the highest known positron energies ever recorded. The positrons are …
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Spectrum and conversion efficiency measurements of suprathermal electrons from relativistic laser plasma interactions
… Confinement Fusion (ICF) that uses a petawatt laser to ignite a hot spot in precompressed fuel. The laser delivers its energy into relativistic electrons at the critical surface of the blowoff plasma. These electrons must propagate to the fuel core and deliver their energy to a hot spot. …
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Experimental investigation of the emission of high-brightness extreme ultraviolet radiation from laser-plasma interactions
The laser wakefield accelerator is a novel particle accelerator that takes advantage of the large electric fields generated by separating oppositely charged particles in plasma. The ponderomotive force of an intense, ultra-short duration, laser pulse drives density waves in under-dense plasma to …
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Radiation Studies Of The Tin-doped Microscopic Droplet Laser Plasma Light Source Specific To Euv Lithography
… this need, extensive studies on emission from a laser plasma source utilizing tin-doped droplet target was conducted. Presented in this work, are the many optical techniques such as spectroscopy, radiometry, and imaging, that were employed to characterize and optimize emission from the laser …
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Investigation of Plume Expansion and Target Surface Characteristics of a Micro Laser Plasma Thruster for Satellite Application
Made available in DSpace on 2017-07-06T18:56:01Z (GMT). No. of bitstreams: 3 Reilly_Michael_P_MS.pdf: 55061972 bytes, checksum: e94f783552dd14bb02f96ea4b7b7e8db (MD5) Reilly_Michael_P_MS_ABS.pdf: 962544 bytes, checksum: 04b8b5608a5716a486cefb523e29791f (MD5) license.txt: 4813 bytes, checksum: …
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The Role of The Plasma During Laser-Gas and Laser-Metal Interactions
The regime of CW laser-plasma-target interaction at intensities below 10('7) W/cm('2) has been overlooked except for a few studies of gas assist configurations. The recent advances in industrial laser material processing and modeling efforts warrant a detailed study of laser-plasma-target …
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Coupled modes analysis of SRS backscattering, with Langmuir decay and possible cascadings
… stimulated Raman scattering (SRS) in ICF laser-plasma interactions, suggest that SRS is coupled to the Langmuir decay interaction (LDI). The effects of LDI on the saturation of the SRS backscattering have been investigated, considering typical parameters from recent experiments. Detailed …
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Laser-driven beams of fast ions, relativistic electrons and coherent x-ray photons
… 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. When interacting with matter, the extreme energy …
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Interacción de un pulso de láser de alta potencia con una microesfera sobredensa
… de fusión controlada es el confinamiento de un plasma durante el tiempo necesario para producir reacciones termonucleares que liberen, al menos, la energía consumida en la producción de dicho plasma. Numerosos estudios han mostrado, por una parte, la posibilidad de conseguir el confinamiento del …
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Acceleration of heavy Ions to MeV/nucleon Energies by Ultrahigh-Intensity Lasers
… heavy ions to multi-MeV energies by means of a laser is demonstrated for the first time. Using an ultrahigh-intensity laser, with focal intensities exceeding 5 x 10^19 W/cm^2, the laser-plasma interaction becomes relativistic and a strong electron current is driven in laser direction. These …
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Characterization of mono-energetic charged-particle radiography for high energy density physics experiments
… Fusion capsules during their implosions, Laser-Plasma Interactions, and Rayleigh-Taylorinstability growth. An imploded D23He-filled glass capsule - the backlighter - provides monoenergetic 15-MeV and 3-MeV protons and 3.6-MeV alphas for radiographing these various phenomena. Because the …
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One and two photon absorption of atoms and ions
… with special emphasis on photoabsorption in a laser-produced strontium plasma. The dual laser plasma (DLP) technique has been employed to carry out these studies and adapted to include an optical parametric oscillator (OPO), tuneable in the visible wavelength range (410-700 nm), to permit …
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Laser-driven electron acceleration in infinite vacuum
I first review basic models for laser-plasma interaction that explain electron acceleration and beam confinement in plasma. Next, I discuss ponderomotive electron acceleration in infinite vacuum, showing that the transverse scattering angle of the accelerated electron may be kept small with a …
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