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 15 of 15 for “"Coulomb collisions"”.
-
Energy Exchange Processes Through Coulomb Collisions in Gaseous Dischargeplasmas Studied by Microwave Interaction Techniques
Made available in DSpace on 2014-12-04T21:02:58Z (GMT). No. of bitstreams: 1 0025209.pdf: 7006466 bytes, checksum: cb6c27bd66d3a9b84217dc20c5d1af1b (MD5) Previous issue date: 1957
-
Study of Coulomb collisions and magneto-ionic propagation effects on incoherent scatter radar measurements at Jicamarca
In this dissertation, Coulomb collisions and magneto-ionic propagation effects on the incoherent scatter radar measurements have been studied and analyzed in detail. The present study aims at modeling radar observations of the equatorial ionosphere carried out at the Jicamarca Radio Observatory …
-
Particles in Plasma Processing Reactors: Modeling Nucleation, Transport, and Interparticle Effects to Reduce Wafer Contamination
Particle transport is also affected by Coulomb interactions between particles. Experimental observations showed that in trapping sites particles form clouds and move collectively. We numerically investigated Coulomb interactions between particles. In rf discharges, ordered systems (Coulomb liquids …
-
Proton deceleration near the surface on an accreting neutron star
… depth. The dominant stopping mechanism is binary Coulomb collisions with electrons in the plasma at the surface of the neutron star, a process that is strongly modified if the neutron star has a strong (B? 1012 gauss) magnetic field. For magnetic fields of this size, the electron motion …
-
Proton deceleration near the surface of an accreting neutron star
… depth. The dominant stopping mechanism is binary Coulomb collisions with electrons in the plasma at the surface of the neutron star, a process that is strongly modified if the neutron star has a strong (B $>$ 10$\sp{12}$ G) magnetic field. For magnetic fields of this size, the electron motion …
-
Effects of Nuclear Elastic Scattering and Modifications of Ion-Electron Equilibration Power on Advanced-Fuel Burns
… are (1) depletion of low-energy electrons by Coulomb collisions with the ions, and (2) magnetic field effects on the energy transfer between the ions and the electrons. Both NES and the equilibration modifications affect the flow of power to the plasma ions, which is an important factor in the …
-
Fully kinetic numerical modeling of a plasma thruster
… ion-neutral scattering and charge exchange collisions, and Coulomb collisions. The latter were also treated through a Langevin (stochastic) differential equation for the particle trajectories in velocity space. Ion-electron recombination was modeled at the boundaries, and neutrals were …
-
A Multi-Region Multi-Timescale Burning Plasma Dynamics Model for Tokamaks
… alpha particles then heat core ions through Coulomb collisions, which can increase the fusion reaction rate and may conceivably lead to a thermal runaway instability. Meanwhile, core electrons lose energy to the edge plasma and wall through electron cyclotron radiation, bremsstrahlung, …
-
Incoherent Scatter Radar Observations of Dynamic Ion Composition Changes at High Latitudes during Geomagnetic Storms
… (taken from the horizontal wind model 2007), and Coulomb collisions, while the fitting schemes simultaneously determine both electric fields and features of composition. These new estimators are used to analyze Sondrestrom ISR datasets from 1998-2008 for quiet (Kp < 3) and storm (Kp > 3) times. …
-
Cryogenic surface electrode ion traps with integrated superconducting microwave resonators for polar molecular ion spectroscopy
… rates by the co-trapped molecular-atomic ions Coulomb collisions. The second method is based on microwave cavity assisted heating or cooling of the molecular ions. The second part of the thesis presents the development of a cryogenic surface electrode RF ion trap with an integrated microwave …
-
Rayleigh-Taylor-Induced electromagnetic fields in laser-produced plasmas
… in the plasma through the Lorentz force and Coulomb collisions, respectively. Corresponding x-ray radiographs of these targets provided mass density distributions and Coulomb effects on protons were assessed using a Monte Carlo code written using the Geant4 framework. Proton fluence …
-
Magneto-thermal Instability in Dilute Magnetized Plasmas
… field lines but only infrequently scatter due to Coulomb collisions. The anisotropic heat conduction, in the presence of a large-scale temperature gradient, destabilises otherwise stable entropy-stratified flows (according to the classic Schwarzschild criterion) via the magneto-thermal instability …
-
Multi-messenger constraints and pressure from dark matter annihilation into electron-positron pairs
… Compton scattering, synchrotron radiation, Coulomb collisions, bremsstrahlung, and ionization. The first part of this work, focusing on pressure from dark matter annihilation, demonstrates that dark matter annihilation into electron-positron pairs may affect the observed rotation curve by a …
-
Numerical simulations of radiation and heating from non-thermal electrons in solar flares
… along a magnetic field of an electron undergoing Coulomb collisions with particles of a background plasma. We describe the field and density models used, and consider the effects of gradient and curvature drifts on particles. In Chapter 3 we present results showing the non-thermal X-ray emission …