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.
Results
Showing 1 to 20 of 36 for “"plasma interactions"”.
-
Numerical simulation of wave-plasma interactions in the ionosphere
… result in the excitation of a diverse range of plasma waves and instabilities. This thesis presents the development and application of a GPU-accelerated finite-difference time-domain (FDTD) code designed to simulate the time-explicit response of an ionospheric plasma to incident EM waves. …
-
Collective charged particle dynamics in relativistically transparent laser-plasma interactions
… charged particle dynamics in laser driven dense plasma sources and in its potential applications; including ion and radiation source development.The experimental and numerical investigations exploring the onset and the underpinning physics of the relativistic transparency have focused on its …
-
Bremsstrahlung radiation and fast electron transport in laser-plasma interactions
… the generation of x-rays within solid target interactions and, secondly, to apply this understanding to radiography of industrial samples. Across three experimental investigations aspects of the x-ray source are addressed; in the first the spatial evolution of the x-ray source is investigated; …
-
Studies of Spectral Modification in Intense Laser Pulse-Plasma Interactions
Laser pulses propagating through plasma undergo spectral broadening through local energy exchange with driven plasma waves. During propagation, a high power laser pulse drives large amplitude plasma waves, depleting the pulse energy. At the same time, the large amplitude plasma wave provides a …
-
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 …
-
Experimental Studies of Spacecraft Plasma Interactions: Facility Characterization and Initial Measurements
… of this thesis are to characterize the plasma environment of a new vacuum chamber facility at Virginia Tech and to perform initial measurements of plasma flow field for studying spacecraft-plasma interactions using this facility. An argon plasma environment was created using a hot …
-
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 …
-
Kinetic Simulations of Spacecraft Charging and Plasma Interactions in the Solar Wind
… out to investigate spacecraft charging and plasma interactions in the solar wind. The physics of spacecraft charging in solar wind is determined by the mesothermal flow and the photoelectron sheath. In order to properly resolve both plasma flow and the photoelectron sheath, a 3-D full …
-
Electron beam-plasma interactions with the Versatile Toroidal Facility (VTF) for ionospheric simulation
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
-
Spectrum and conversion efficiency measurements of suprathermal electrons from relativistic laser plasma interactions
… 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. Electrons of energies between 1 and 3 MeV have the appropriate range for efficient energy deposition. This thesis experimentally explores the coupling …
-
Numerical simulation of plasma interactions with high voltage solar arrays in low earth orbit
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
-
Experimental investigation of the emission of high-brightness extreme ultraviolet radiation from laser-plasma interactions
… 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 create an accelerating structure similar to that of a radio-frequency cavity, but with a longitudinal field strength more …
-
Numerical analysis of radio-frequency sheath-plasma interactions in the ion cyclotron range of frequencies
Electromagnetic plasma waves in the ion cyclotron range of frequencies (ICRF) are routinely used in magnetic fusion experiments to heat plasmas and drive currents. However, many experiments have revealed that wave energy losses in the plasma edge and at the wall are significant, and detected that …
-
Arc rate predictions and flight data analysis for the Solar Array Module Plasma Interactions experiment (SAMPIE)
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
-
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 …
-
Optical Emissions Generated During Ionospheric Heating
… a large number of linear and non-linear wave-plasma interactions. One outcome of these interactions is the acceleration of thermal ionospheric electrons, leading to the production of induced optical emissions. Detection of these emissions yields information regarding wave-plasma interactions, …
-
Transient antenna-plasma interaction in inductive plasma thrusters
… technologies under consideration, inductive plasma thrusters are a promising candidate due to their high thrust density and proven propellant flexibility. In contrast with conventional space propulsion technologies, inductive coupling can deliver energy to a propellant without direct contact, …
-
Analysis of low-energy neutral hydrogen fluxes using an electron cyclotron resonance-heated discharge
… such as fundamental cross section measurement, plasma diagnostics, beam-plasma interactions, and further beam-target research.
-
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 …
-
The generation of high field terahertz radiation and its application in terahertz nonlinear spectroscopy
… of impact ionization and interesting phonon-plasma interactions in indium antimonide (InSb) for the first time. Nonlinear vibrational responses in LN were ob-served first in a dual THz beam setup on an integrated LN waveguide platform with optical probing to reveal the generation of terahertz …
Page 1 of 2