Download or read book Specular Reflectivity and Suprathermal Electron Measurements from Relativistic Laser Plasma Interactions written by Anthony John Link and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Short pulse, high intensity laser plasma interactions couple a significant portion of the laser energy into relativistic electrons at the plasma critical density. This interaction forms the basis for an igniter beam in the Fast Ignition (FI) approach to Inertial Fusion Energy. However, the details on how much laser energy is coupled into electrons, and the momentum distribution of these laser accelerated electrons are still not well known. This thesis contains experimental measurements of the specularly reflected light and electrons that escape the plasma, as well as numerical simulations of the energy spectrum of electrons escaping from a target struck by an ultra-intense laser pulse to investigate laser plasma interactions. The electrons that escape the plasma to reach a detector in vacuum are modified by electromagnetic fields in the material and at the plasma-vacuum interface as electrons leave a previously charge neutral plasma. These dynamic fields have made the experimental connection between the electrons measured far from the plasma and the internal distribution difficult. The experimental spectrum recorded at the detector typically has two distinct regions, a strong low energy feature and a semilog feature at higher energies. The numerical simulations show that the measured electrons in this higher energy semilog feature contain information about the initial distribution but are modified by the fields due to target charging. The measured electrons in the low energy feature are due to a secondary process where the electrons accelerate ions and leave the plasma with them. These electrons do not directly contain information about the initial electron distribution. The experimental measurements when accounting for the results of the simulations show that the ponderomotive theory of laser plasma interactions is correct at high intensities and is independent of laser pulse duration. The advanced fast ignition design uses a reentrant cone to protect the laser light from blowoff plasma during the implosion and has been proposed to provide a means to increase the focal intensity by using the cone walls to guide the laser. A novel specular imaging diagnostic was developed capable of measuring in-situ reflected laser pulses with greater than 100 J of laser light and oh-shot intensities greater than 1020 Wcm-2. This spatially resolved diagnostic for the first time presents both the spatial quality of the reflected light as well as the time-integrated reflectivity from the laser plasma interaction. These experimental results show that the laser light reflecting from the target has a much wider divergence than the initial laser beam, and the reflectivity of the plasma varies significantly with incident angle. This increased reflected divergence makes the use of the wall of the cone a poor choice for increasing laser intensity on target. Furthermore, the reflectivity varies from 2% to 50% in changing the incident angle of light from 20° to 75°, making multiple cone wall bounces at a further disadvantage for guiding light to the cone tip.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 1470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plasma Physics Index written by and published by . This book was released on 1982 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Plasmas and Nuclear Energy written by Heinrich Hora and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Short Pulse Laser Interactions With Matter An Introduction written by Paul Gibbon and published by World Scientific. This book was released on 2005-09-05 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents the first comprehensive treatment of the subject, covering the theoretical principles, present experimental status and important applications of short-pulse laser-matter interactions.Femtosecond lasers have undergone dramatic technological advances over the last fifteen years, generating a whole host of new research activities under the theme of “ultrafast science”. The focused light from these devices is so intense that ordinary matter is torn apart within a few laser cycles. This book takes a close-up look at the exotic physical phenomena which arise as a result of this new form of “light-matter” interaction, covering a diverse set of topics including multiphoton ionization, rapid heatwaves, fast particle generation and relativistic self-channeling. These processes are central to a number of exciting new applications in other fields, such as microholography, optical particle accelerators and photonuclear physics.Repository for numerical models described in Chapter 6 can be found at www.fz-juelich.de/zam/cams/plasma/SPLIM/./a
Download or read book Physics Briefs written by and published by . This book was released on 1989 with total page 966 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Space Plasma Physics written by Wolfgang Baumjohann and published by World Scientific. This book was released on 1997-01-03 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book builds on the fluid and kinetic theory of equilibria and waves presented in a companion textbook, Basic Space Plasma Physics (by the same authors), but can also serve as a stand-alone text. It extends the field covered there into the domain of plasma instability and nonlinear theory.The book provides a representative selection of the many possible macro- and microinstabilities in a space plasma, from the Rayleigh-Taylor and Kelvin-Helmholtz to electrostatic and electromagnetic kinetic instabilities. Their quasilinear stabilization and nonlinear evolution and their application to space physics problems are treated. The chapters on nonlinear theory include nonlinear waves, weak turbulence and strong turbulence, all presented from the viewpoint of their relevance to space plasma physics. Special topics include auroral particle acceleration, soliton formation and caviton collapse, anomalous transport, and the theory of collisionless shocks.
Download or read book Laser Plasma Interactions written by Dino A. Jaroszynski and published by CRC Press. This book was released on 2009-03-27 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Solid Compendium of Advanced Diagnostic and Simulation ToolsExploring the most exciting and topical areas in this field, Laser-Plasma Interactions focuses on the interaction of intense laser radiation with plasma. After discussing the basic theory of the interaction of intense electromagnetic radiation fields with matter, the book covers three ap
Download or read book INIS Atomindex written by and published by . This book was released on 1985 with total page 1474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Experiments in Space Past Present and Future written by Gian Luca Delzanno and published by Frontiers Media SA. This book was released on 2020-07-10 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics of the Interstellar and Intergalactic Medium written by Bruce T. Draine and published by Princeton University Press. This book was released on 2010-12-20 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a comprehensive and richly illustrated textbook on the astrophysics of the interstellar and intergalactic medium--the gas and dust, as well as the electromagnetic radiation, cosmic rays, and magnetic and gravitational fields, present between the stars in a galaxy and also between galaxies themselves. Topics include radiative processes across the electromagnetic spectrum; radiative transfer; ionization; heating and cooling; astrochemistry; interstellar dust; fluid dynamics, including ionization fronts and shock waves; cosmic rays; distribution and evolution of the interstellar medium; and star formation. While it is assumed that the reader has a background in undergraduate-level physics, including some prior exposure to atomic and molecular physics, statistical mechanics, and electromagnetism, the first six chapters of the book include a review of the basic physics that is used in later chapters. This graduate-level textbook includes references for further reading, and serves as an invaluable resource for working astrophysicists. Essential textbook on the physics of the interstellar and intergalactic medium Based on a course taught by the author for more than twenty years at Princeton University Covers radiative processes, fluid dynamics, cosmic rays, astrochemistry, interstellar dust, and more Discusses the physical state and distribution of the ionized, atomic, and molecular phases of the interstellar medium Reviews diagnostics using emission and absorption lines Features color illustrations and detailed reference materials in appendices Instructor's manual with problems and solutions (available only to teachers)
Download or read book Introduction to Particle Physics written by Dezső Horváth and published by Cambridge Scholars Publishing. This book was released on 2019-05-03 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is a unique treatise on the present status of particle physics summarised for physics students at an introductory level: it provides insights into the essential experimental and theoretical techniques needed to start research at modern high energy accelerators such as the Large Hadron Collider at CERN. The first three parts of the book discuss the experimental and phenomenological aspects at a level suitable for MSc students, but BSc students interested in particle physics will also find useful information there. The fourth part is oriented to advanced MSc or PhD students to make them acquainted with the precise formulation of the standard model of particle interactions, as well as with the mathematical background needed for the correct interpretation of the experimental results. In this two-step approach, the book offers a gradually deepening understanding of particle physics, building up the standard model and providing an overview of its verification, together with the necessary theoretical and experimental techniques. Using the example of the simplest present-day experiments, it is explained how one can obtain experimental results and theoretical estimations for measurable quantities from clear basic principles. The sources of uncertainties and the methods of improving precision are also discussed.
Download or read book Debye Screening Length written by Kamakhya Prasad Ghatak and published by Springer. This book was released on 2013-11-05 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph solely investigates the Debye Screening Length (DSL) in semiconductors and their nano-structures. The materials considered are quantized structures of non-linear optical, III-V, II-VI, Ge, Te, Platinum Antimonide, stressed materials, Bismuth, GaP, Gallium Antimonide, II-V and Bismuth Telluride respectively. The DSL in opto-electronic materials and their quantum confined counterparts is studied in the presence of strong light waves and intense electric fields on the basis of newly formulated electron dispersion laws that control the studies of such quantum effect devices. The suggestions for the experimental determination of 2D and 3D DSL and the importance of measurement of band gap in optoelectronic materials under intense built-in electric field in nano devices and strong external photo excitation (for measuring photon induced physical properties) have also been discussed in this context. The influence of crossed electric and quantizing magnetic fields on the DSL and the DSL in heavily doped semiconductors and their nanostructures has been investigated. This monograph contains 150 open research problems which form the integral part of the text and are useful for both PhD students and researchers in the fields of solid-state sciences, materials science, nano-science and technology and allied fields in addition to the graduate courses in modern semiconductor nanostructures.
Download or read book Cognitive Phase Transitions in the Cerebral Cortex Enhancing the Neuron Doctrine by Modeling Neural Fields written by Robert Kozma and published by Springer. This book was released on 2015-10-30 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: This intriguing book was born out of the many discussions the authors had in the past 10 years about the role of scale-free structure and dynamics in producing intelligent behavior in brains. The microscopic dynamics of neural networks is well described by the prevailing paradigm based in a narrow interpretation of the neuron doctrine. This book broadens the doctrine by incorporating the dynamics of neural fields, as first revealed by modeling with differential equations (K-sets). The book broadens that approach by application of random graph theory (neuropercolation). The book concludes with diverse commentaries that exemplify the wide range of mathematical/conceptual approaches to neural fields. This book is intended for researchers, postdocs, and graduate students, who see the limitations of network theory and seek a beachhead from which to embark on mesoscopic and macroscopic neurodynamics.
Download or read book Transmission Line Design Handbook written by Brian C. Wadell and published by Artech House Microwave Library. This book was released on 1991 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Transmission Line Design Handbook consolidates and distills key design data from over 600 original sources. It features 800 equations, 220 illustrations, and 610 references.
Download or read book Low Energy X ray Diagnostics 1981 written by David T. Attwood and published by American Institute of Physics. This book was released on 1981 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
