A Collisionless Shock Wave Experiment
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A Collisionless Shock Wave Experiment
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Author :
language : en
Publisher:
Release Date : 1995
A Collisionless Shock Wave Experiment 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 categories.
Collisionless shock waves are a very important heating mechanism for plasmas and are commonly found in space and astrophysical environments. Collisionless shocks were studied in the laboratory more than 20 years ago, and more recently in space via in situ satellite measurements. The authors propose a new laboratory shock wave experiment to address unresolved issues related to the differences in the partition of plasma heating between electrons and ions in space and laboratory plasmas, which can have important implications for a number of physical systems.
Preionization For Collisionless Shock Wave Experiments By Means Of Photionization
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Author : M. Keilhacker
language : en
Publisher:
Release Date : 1969
Preionization For Collisionless Shock Wave Experiments By Means Of Photionization written by M. Keilhacker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Photoionization of gases categories.
Physics Of Collisionless Shocks
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Author : André Balogh
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-01-04
Physics Of Collisionless Shocks written by André Balogh and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-04 with Science categories.
The present book provides a contemporary systematic treatment of shock waves in high-temperature collisionless plasmas as are encountered in near Earth space and in Astrophysics. It consists of two parts. Part I develops the complete theory of shocks in dilute hot plasmas under the assumption of absence of collisions among the charged particles when the interaction is mediated solely by the self-consistent electromagnetic fields. Such shocks are naturally magnetised implying that the magnetic field plays an important role in their evolution and dynamics. This part treats subcritical shocks which dissipate flow energy by generating anomalous resistance or viscosity. The main emphasis is, however, on super-critical shocks where the anomalous dissipation is insufficient to retard the upstream flow. These shocks, depending on the direction of the upstream magnetic field, are distinguished as quasi-perpendicular and quasi-parallel shocks which exhibit different behaviours, reflecting particles back upstream and generating high electromagnetic wave intensities. Particle acceleration and turbulence at such shocks become possible and important. Part II treats planetary bow shocks and the famous Heliospheric Termination shock as examples of two applications of the theory developed in part I.
Experimental Study Of Collisionless Shock Waves
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Author : J. W. M. Paul
language : en
Publisher:
Release Date : 1971
Experimental Study Of Collisionless Shock Waves written by J. W. M. Paul and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Magnetic fields categories.
Preionization For Collisionless Shock Wave Experiments By Means Of Photoionization
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Author : Martin Keilhacker
language : de
Publisher:
Release Date : 1969
Preionization For Collisionless Shock Wave Experiments By Means Of Photoionization written by Martin Keilhacker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with categories.
The Quasi Parallel Collisionless Shock Wave
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Author : Mark E. Mandt
language : en
Publisher:
Release Date : 1988
The Quasi Parallel Collisionless Shock Wave written by Mark E. Mandt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Plasma (Ionized gases) categories.
A Study Of Collisionless Plasma Shocks
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Author : Ralph H. Lovberg
language : en
Publisher:
Release Date : 1973
A Study Of Collisionless Plasma Shocks written by Ralph H. Lovberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with categories.
The report discusses an experiment designed to study collisionless shock waves in an inverse pinch discharge using argon. A magnetic disturbance was generated which propagated ahead of the driving field at twice the piston speed. Measurements of the magnetic and electric field structures, electron density and temperature, as well as ion velocities revealed that the disturbance was produced by a beam of plasma moving through the ionized ambient plasma rather than by a true shock wave. Calculations of ion trajectories using measured electric fields demonstrated that the beam originated at small radii and early times, and was not the result of a steady specular reflection from the piston field. It is concluded that the ions comprising this stream, which were collisionless relative to the ambient ions, did not couple to the background plasma even though a strong magnetic field was applied. (Author).
Experimental Observations Of Collisionless Shock Waves In A Magnetized Plasma
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Author : J.W.M. Paul
language : en
Publisher:
Release Date : 1965
Experimental Observations Of Collisionless Shock Waves In A Magnetized Plasma written by J.W.M. Paul and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
Oblique Collisionless Shock Waves In Plasma
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Author : William E. Drummond
language : en
Publisher:
Release Date : 1969
Oblique Collisionless Shock Waves In Plasma written by William E. Drummond and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with categories.
The work covered by this report is part of an experimental program to study oblique shock waves in plasma. The support from DASA under this contract was for the continuation of the experimental program with particular regard to measurements on shock using light scattering techniques. The measurements made on the Texas oblique shock experiment were first detailed investigation of the magnetic and electronic structure of the oblique shock. Compared to the fairly extensive body of information which exists on shocks moving perpendicular to the magnetic field, there had previously been only very scanty results on oblique shocks. This was largely because the oblique shock has a larger scale length (approx. c/omega sub pi) than the perpendicular shock (approx. c/omega sub pe), and consequently experiments designed from the onset to study the oblique shock, and was significantly larger in scale (50 cm diameter) than most shock experiments. The experiment has yielded unique information about the structure of oblique shocks.
Theoretical And Numerical Studies Of Relativistic Collisionless Shock Waves
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Author : Arno Vanthieghem
language : en
Publisher:
Release Date : 2019
Theoretical And Numerical Studies Of Relativistic Collisionless Shock Waves written by Arno Vanthieghem and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Collisionless relativistic shock waves play a major role in extreme astrophysical objects such as gamma-ray bursts, blazars and pulsars wind nebulae, in which they are held responsible for producing nonthermal particle and radiation distributions. Without an external magnetic field, these shocks stem from the interaction, mediated by microinstabilities, of a beam of Fermi-accelerated particles with the ambient plasma. There results an electromagnetic turbulence that scatters both the beam and plasma particles. While the background plasma is mainly slowed down and heated, a fraction of its particles are accelerated to suprathermal energies, thus sustaining the shock wave. Understanding the highly nonlinear physics of such structures requires combining analytical models and large-scale particle-in-cell (PIC) numerical simulations. After a short review of the concepts and numerical techniques used to address the topic, we first examine the evolution of the current filamentation instability, which prevails in the precursor region of initially unmagnetized shocks. We then develop a comprehensive microphysical model of such shocks. To this purpose, we introduce the notion of a preferential frame, in which the microturbulence is quasi-magnetostatic, thus allowing the description of the particle scattering to be greatly simplified. Finally, we analyze the influence of a neutron ejecta propagating upstream of a gamma-ray burst shock. For each study, our model predictions are substantiated by state-of-the-art PIC simulations. particules.