Laser Produced High Current Relativistic Electron Beam
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Author | : Arnaud Debayle |
Publisher | : LAP Lambert Academic Publishing |
Total Pages | : 212 |
Release | : 2010-04 |
Genre | : |
ISBN | : 9783838340050 |
Download Laser-Produced High-Current Relativistic Electron Beam Book in PDF, Epub and Kindle
In the first part of this PhD thesis, we present an interpretation of a part of experimental results of laser-produced electron beam transport in aluminium foil targets. We have estimated the fast electron beam characteristics and we demonstrated that the collective effects dominate the transport in the first tens of microns of propagation. These quantitative estimates were done with transport models already existing at the beginning of this thesis. These models are no longer sufficient in the case a fast electron beam propagation in insulator targets. Thus, in the second part, we have developed a propagation model of the beam that includes the effects of electric field ionization and the collisional ionization by the plasma electrons. We present estimates of the electron energy loss induced by the target ionization. For a low beam electron density, we demonstrated that the beam creates a plasma where the electons are not in a local thermodynamic equilibrium with ions. We have examined the beam stability and we demonstrated that transverse instabilities can be excited by the relativistic electron beam
Author | : Arnaud Debayle |
Publisher | : |
Total Pages | : 0 |
Release | : 2008 |
Genre | : |
ISBN | : |
Download Theoretical Study of Ultra High Intensity Laser-produced High-current Relativistic Electron Beam Transport Through Solid Targets Book in PDF, Epub and Kindle
This PhD thesis is a theoretical study of high-current relativistic electron beam transport through solid targets. In the ?rst part, we present an interpretation of a part of experimental results of laser- produced electron beam transport in aluminium foil targets. We have estimated the fast electron beam characteristics and we demonstrated that the collective e?ects dominate the transport in the ?rst tens of μm of propagation. These quantitative estimates were done with the transport models already existing at the beginning of this thesis. These models are no longer su?cient in the case a fast electron beam propagation in insulator targets. Thus, in the second part, we have developed a propagation model of the beam that includes the e?ects of electric ?eld ionization and the collisional ionization by the plasma electrons. We present estimates of the electron energy loss induced by the target ionization, and we discuss its dependence on the beam and target parameters. In the case of a relatively low fast electron density, we demonstrated that the beam creates a plasma where the electons are not in a local thermodynamic equilibrium with ions. We have examined the beam stability and we demonstrated that transverse instabilities can be excited by the relativistic electron beam over the propagation distances of 30 - 300 μm depending on the perturbation wavelength.
Author | : Alexandru Mircea Popa |
Publisher | : |
Total Pages | : 0 |
Release | : 2021 |
Genre | : Laser-plasma interactions |
ISBN | : 9780750339834 |
Download Ultra-relativistic Effects of Laser Beam and Electron Interactions Book in PDF, Epub and Kindle
The latest generation of high-power pulsed lasers has renewed interest in the ultra-relativistic effects produced by the interaction between laser beams and electrons. Synthesising previous research, this book presents a unitary treatment of the main effects that occur in the ultra-relativistic interactions between laser beams and electrons. It uses exact solutions of relativistic and classical quantum equations, including a new solution of the Dirac equation, to fully describe the field and model the main ultra-relativistic effects created within it.
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 177 |
Release | : 2003-05-11 |
Genre | : Science |
ISBN | : 030908637X |
Download Frontiers in High Energy Density Physics Book in PDF, Epub and Kindle
Recent scientific and technical advances have made it possible to create matter in the laboratory under conditions relevant to astrophysical systems such as supernovae and black holes. These advances will also benefit inertial confinement fusion research and the nation's nuclear weapon's program. The report describes the major research facilities on which such high energy density conditions can be achieved and lists a number of key scientific questions about high energy density physics that can be addressed by this research. Several recommendations are presented that would facilitate the development of a comprehensive strategy for realizing these research opportunities.
Author | : |
Publisher | : |
Total Pages | : 0 |
Release | : 1992 |
Genre | : |
ISBN | : |
Download Plasma Wakefield Effects On High-Current Relativistic Electron Beam Transport In The Ion-Focused Regime Book in PDF, Epub and Kindle
Modulation of the beam current has been observed during ion focused regime (IFR) transport of a high power relativistic electron beam propagating through a low-density background plasma. Injecting a high current, high energy electron beam into an IFR channel immersed in a background plasma induces plasma oscillations. These background plasma oscillations, induced by the risetime portion of the beam ejecting plasma electrons from the vicinity of the beam into the background plasma, give rise to a modulated axial electric field. This field travels with the beam leading to beam energy and current oscillations. In the experiment, a 1.7-MeV, 1-kA, risetime-sharpened electron beam is propagated on a KrF excimer laser produced IFR channel in TMA gas, which is immersed in a low density plasma filled transport tube. We present experimental measurements and computer simulations demonstrating modulation of this high current relativistic electron beam near the low density background plasma frequency.
Author | : Mireille Coury |
Publisher | : |
Total Pages | : 0 |
Release | : 2013 |
Genre | : |
ISBN | : |
Download Generation and Transport of High-current Relativistic Electron Beams in High Intensity Laser-solid Interactions Book in PDF, Epub and Kindle
Author | : Nikita Wells |
Publisher | : |
Total Pages | : 100 |
Release | : 1987 |
Genre | : Electron beams |
ISBN | : |
Download Soviet Research on the Transport of Intense Relativistic Electron Beams Through High-pressure Air Book in PDF, Epub and Kindle
Soviet research on the propagation of intense relativistic electron beams (IREB) through fairly high-pressure air (pressure range 0.1 to 760 Torr) since the early 1970s has included the study of the plasma channel created by the passage of the electron beam through air, the resistive hose instability and its effect on beam propagation, the effect of self-fields, current enhancement, gas expansion, return currents, inherent beam energy spread, and other factors. This report covers Soviet developments in IREB propagation through air where the beam is not focused by external magnetic fields. The information was obtained from Soviet open-source publications with emphasis given to the last ten years of beam propagation in the Soviet Union. The volume of papers published on this subject in recent years indicates a significant increase in Soviet research in this area.
Author | : David Andrew Hammer |
Publisher | : |
Total Pages | : 298 |
Release | : 1969 |
Genre | : Electron beams |
ISBN | : |
Download Studies of High Current Relativistic Electron Beam Propagation Book in PDF, Epub and Kindle
Author | : H. Schlüter |
Publisher | : Springer Science & Business Media |
Total Pages | : 592 |
Release | : 1999-02-28 |
Genre | : Science |
ISBN | : 9780792356424 |
Download Advanced Technologies Based on Wave and Beam Generated Plasmas Book in PDF, Epub and Kindle
This book draws together three areas of work on plasma technologies: advanced efforts based on wave generated, high frequency plasmas, plasma assisted ion implantation, and electron beam generated plasma. It lays a foundation for the application of sources in industry and various research areas
Author | : |
Publisher | : |
Total Pages | : 32 |
Release | : 1974 |
Genre | : Controlled fusion |
ISBN | : |
Download The Application of High Current Relativistic Electron Beams in Controlled Thermonuclear Research Book in PDF, Epub and Kindle