Electron Transport Ion Acoustic Dynamics In Laser Produced Plasmas
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Electron Transport Ion Acoustic Dynamics In Laser Produced Plasmas
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Author : Frank Detering
language : en
Publisher:
Release Date : 2002
Electron Transport Ion Acoustic Dynamics In Laser Produced Plasmas written by Frank Detering and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Electron Transport Ion Acoustic Dynamics In Laser Produced Plasmas
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Author :
language : en
Publisher:
Release Date : 2008
Electron Transport Ion Acoustic Dynamics In Laser Produced Plasmas written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
In this thesis laser-plasma processes are studied at transport and ion time scales. In order to study these processes the particle-in-cell code QNPIC with one spatial dimension and three dimensions in velocity space was developed. Collisional effects are included by a Monte Carlo procedure, and an electric field solver based on the quasineutrality condition has been implemented. This allows long time scale simulations without having to resolve the electron plasma frequency. Collisional heating of the electrons in the laser electric field is one of the major restrictions on the time step in particle-in-cell codes. We have developed a collisional heating procedure that is based on a Langevin equation. It utilizes a Fokker-Planck equation that describes heating time averaged over the laser frequency. This procedure, in conjunction with the fast field solver and procedures to represent collisions, allows simulation of long time scale in laser-plasma interactions without the need to resolve the short time scales to ensure numerical stability and suppress numerical artifacts. We have studied in detail homogeneously heated plasmas and the effects of electron-electron collisions and collisional heating on the electron distribution function. We have suggested a nonlocal, nonlinear heat transport model based on a earlier self consistent nonlocal transport theory that is formally restricted to small (linearized) temperature perturbations. Our model extends this model to the case of finite temperature perturbations. The model is tested successfully in simulations of hot spot relaxation of an initial temperature distribution that corresponds to the instantaneous release of heat into a spatially Gaussian temperature profile and Maxwellian velocity distributions of the electrons. In simulations of collisionally heated hot spots we qualitatively describe the effects of non-Maxwellian velocity distributions on the heat flux and the change of the distribution function due to transpor.
Fusion Energy Update
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Author :
language : en
Publisher:
Release Date : 1982-04
Fusion Energy Update written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982-04 with Controlled fusion categories.
Introduction To Plasma Dynamics
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Author : A. I. Morozov
language : en
Publisher: CRC Press
Release Date : 2012-12-06
Introduction To Plasma Dynamics written by A. I. Morozov and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
As the twenty-first century progresses, plasma technology will play an increasing role in our lives, providing new sources of energy, ion-plasma processing of materials, wave electromagnetic radiation sources, space plasma thrusters, and more. Studies of the plasma state of matter not only accelerate technological developments but also improve the
Survey Of Ion Acoustic Instability Particle Simulations And Relevance To Laser Fusion Thermal Transport Inhibition
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Author :
language : en
Publisher:
Release Date : 1980
Survey Of Ion Acoustic Instability Particle Simulations And Relevance To Laser Fusion Thermal Transport Inhibition written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.
Ion acoustic turbulence is examined as one mechanism which could contribute to the inhibition of electron thermal transport which has been inferred from many laser-plasma experiments. The behavior of the ion acoustic instability is discussed from the viewpoint of the literature of 2-dimensional particle-in-cell simulations. Simulation techniques, limitations, and reported saturation mechanisms and levels are discussed. A scaling law for the effective collision frequency .nu.* can be fit to several workers' results to within an order-of-magnitude. The inferred .nu.* is shown to be 1-2 orders-of-magnitude too small to account for the transport inhibition seen in Nd-laser-produced plasmas. Several differences between the simulation conditions and laser-produced plasma conditions are noted.
Dynamics Of Ultrafast Laser Produced Plasmas
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Author : Thomas David Donnelly
language : en
Publisher:
Release Date : 1995
Dynamics Of Ultrafast Laser Produced Plasmas written by Thomas David Donnelly and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Strongly Driven Ion Acoustic Waves In Laser Produced Plasmas
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Author :
language : en
Publisher:
Release Date : 1994
Strongly Driven Ion Acoustic Waves In Laser Produced Plasmas written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
This paper present an experimental study of ion acoustic waves with wavenumbers corresponding to stimulated Brillouin scattering. Time resolved Thomson scattering in frequency and wavenumber space, has permitted to observe the dispersion relation of the waves as a function of the laser intensity. Apart from observing ion acoustic waves associated with a strong second component is observed at laser intensities above 1013Wcm−2.
Plasma Physics Index
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Author :
language : en
Publisher:
Release Date : 1982
Plasma Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Plasma (Ionized gases) categories.
Laser Plasma Theory And Simulation
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Author : Hector A. Baldis
language : en
Publisher: CRC Press
Release Date : 2020-05-05
Laser Plasma Theory And Simulation written by Hector A. Baldis and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-05 with Technology & Engineering categories.
This book covers recent developments in laser plasma physics such as absorption, instability, energy transport and radiation from the standpoint of theory and simulation for plasma corona, showing how the elements for the high density compression depend on the interaction physics and heat transport.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.