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Theory And Modeling Of Petawatt Laser Pulse Propagation In Low Density Plasmas
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Book Synopsis Theory and Modeling of Petawatt Laser Pulse Propagation in Low Density Plasmas by :
Download or read book Theory and Modeling of Petawatt Laser Pulse Propagation in Low Density Plasmas written by and published by . This book was released on 2016 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report describing accomplishments in all-optical control of self-injection in laser-plasma accelerators and in developing advanced numerical models of laser-plasma interactions. All-optical approaches to controlling electron self-injection and beam formation in laser-plasma accelerators (LPAs) were explored. It was demonstrated that control over the laser pulse evolution is the key ingredient in the generation of low-background, low-phase-space-volume electron beams. To this end, preserving a smooth laser pulse envelope throughout the acceleration process can be achieved through tuning the phase and amplitude of the incident pulse. A negative frequency chirp compensates the frequency red- shift accumulated due to wake excitation, preventing evolution of the pulse into a relativistic optical shock. This reduces the ponderomotive force exerted on quiescent plasma electrons, suppressing expansion of the bubble and continuous injection of background electrons, thereby reducing the charge in the low-energy tail by an order of magnitude. Slowly raising the density in the pulse propagation direction locks electrons in the accelerating phase, boosting their energy, keeping continuous injection at a low level, tripling the brightness of the quasi-monoenergetic component. Additionally, propagating the negatively chirped pulse in a plasma channel suppresses diffraction of the pulse leading edge, further reducing continuous injection. As a side effect, oscillations of the pulse tail may be enhanced, leading to production of low-background, polychromatic electron beams. Such beams, consisting of quasi-monoenergetic components with controllable energy and energy separation, may be useful as drivers of polychromatic x-rays based on Thomson backscattering. These all-optical methods of electron beam quality control are critically important for the development of future compact, high-repetition-rate, GeV-scale LPA using 10 TW-class, ultra-high bandwidth pulses and mm-scale, dense plasmas. These results emphasize that investment into new pulse amplification techniques allowing for ultrahigh frequency bandwidth, is as important for the design of future LPA as are the current efforts directed to increasing the pulse energy.
Book Synopsis Ultra-Intense Laser Pulse Propagation in Gas and Plasma by : T. M. Antonsen
Download or read book Ultra-Intense Laser Pulse Propagation in Gas and Plasma written by T. M. Antonsen and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: It is proposed here to continue their program in the development of theories and models capable of describing the varied phenomena expected to influence the propagation of ultra-intense, ultra-short laser pulses with particular emphasis on guided propagation. This program builds upon expertise already developed over the years through collaborations with the NSF funded experimental effort lead by Professor Howard Milchberg here at Maryland, and in addition the research group at the Ecole Polytechnique in France. As in the past, close coupling between theory and experiment will continue. The main effort of the proposed research will center on the development of computational models and analytic theories of intense laser pulse propagation and guiding structures. In particular, they will use their simulation code WAKE to study propagation in plasma channels, in dielectric capillaries and in gases where self focusing is important. At present this code simulates the two-dimensional propagation (radial coordinate, axial coordinate and time) of short pulses in gas/plasma media. The plasma is treated either as an ensemble of particles which respond to the ponderomotive force of the laser and the self consistent electric and magnetic fields created in the wake of pulse or as a fluid. the plasma particle motion is treated kinetically and relativistically allowing for study of intense pulses that result in complete cavitation of the plasma. The gas is treated as a nonlinear medium with rate equations describing the various stages of ionization. A number of important physics issues will be addressed during the program. These include (1) studies of propagation in plasma channels, (2) investigation of plasma channel nonuniformities caused by parametric excitation of channel modes, (3) propagation in dielectric capillaries including harmonic generation and ionization scattering, (4) self guided propagation in gas, (5) studies of the ionization scattering instability recently identified theoretically and experimentally in the group, and (6) studies of propagation in cluster plasmas. New models will be developed for the harmonic generation of radiation and these will be incorporated in the modeling and simulation.
Book Synopsis Laser Plasma Theory and Simulation by : Hector A. Baldis
Download or read book Laser Plasma Theory and Simulation written by Hector A. Baldis and published by CRC Press. This book was released on 1994-06-01 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Laser Plasma Theory and Simulation by : Hector A. Baldis
Download or read book Laser Plasma Theory and Simulation written by Hector A. Baldis and published by CRC Press. This book was released on 2020-05-05 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Frontiers in High Energy Density Physics by : National Research Council
Download or read book Frontiers in High Energy Density Physics written by National Research Council and published by National Academies Press. This book was released on 2003-05-11 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis The Propagation of Short-pulse High-intensity Lasers in Underdense Plasmas by : Christopher Dean Decker
Download or read book The Propagation of Short-pulse High-intensity Lasers in Underdense Plasmas written by Christopher Dean Decker and published by . This book was released on 1994 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physics Of Laser Plasma Interactions by : William Kruer
Download or read book The Physics Of Laser Plasma Interactions written by William Kruer and published by CRC Press. This book was released on 2019-08-20 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the physics of laser plasma interactions and presents a complementary and very useful numerical model of plasmas. It describes the linear theory of light wave propagation in plasmas, including linear mode conversion into plasma waves and collisional damping.
Book Synopsis Laser-Plasma Interactions by : Dino A. Jaroszynski
Download or read book Laser-Plasma Interactions written by Dino A. Jaroszynski and published by Taylor & Francis. This book was released on 2009-03-27 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents diagnostic methods, experimental techniques, and simulation tools used to study and model laser-plasma interactions. This book discusses the basic theory of the interaction of intense electromagnetic radiation fields with matter.
Book Synopsis Studies of Low Density Plasmas with Gas Lasers by : Joseph Thomas Verdeyen
Download or read book Studies of Low Density Plasmas with Gas Lasers written by Joseph Thomas Verdeyen and published by . This book was released on 1969 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simulations of the Interaction of Intense Petawatt Laser Pulses with Dense Z-pinch Plasmas by : Robert B. Campbell
Download or read book Simulations of the Interaction of Intense Petawatt Laser Pulses with Dense Z-pinch Plasmas written by Robert B. Campbell and published by . This book was released on 2004 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied the feasibility of using the 3D fully electromagnetic implicit hybrid particle code LSP (Large Scale Plasma) to study laser plasma interactions with dense, compressed plasmas like those created with Z, and which might be created with the planned ZR. We have determined that with the proper additional physics and numerical algorithms developed during the LDRD period, LSP was transformed into a unique platform for studying such interactions. Its uniqueness stems from its ability to consider realistic compressed densities and low initial target temperatures (if required), an ability that conventional PIC codes do not possess. Through several test cases, validations, and applications to next generation machines described in this report, we have established the suitability of the code to look at fast ignition issues for ZR, as well as other high-density laser plasma interaction problems relevant to the HEDP program at Sandia (e.g. backlighting).
Book Synopsis A Superintense Laser-Plasma Interaction Theory Primer by : Andrea Macchi
Download or read book A Superintense Laser-Plasma Interaction Theory Primer written by Andrea Macchi and published by Springer Science & Business Media. This book was released on 2013-01-24 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: The continuous trend towards higher and higher laser intensities has opened the way to new physical regimes and advanced applications of laser-plasma interactions, thus stimulating novel connections with ultrafast optics, astrophysics, particle physics, and biomedical applications. This book is primarily oriented towards students and young researchers who need to acquire rapidly a basic knowledge of this active and rapidly changing research field. To this aim, the presentation is focused on a selection of basic models and inspiring examples, and includes topics which emerged recently such as ion acceleration, "relativistic engineering" and radiation friction. The contents are presented in a self-contained way assuming only a basic knowledge of classical electrodynamics, mechanics and relativistic dynamics at the undergraduate (Bachelor) level, without requiring any previous knowledge of plasma physics. Hence, the book may serve in several ways: as a compact textbook for lecture courses, as a short and accessible introduction for the newcomer, as a quick reference for the experienced researcher, and also as an introduction to some nonlinear mathematical methods through examples of their application to laser-plasma modeling.
Book Synopsis Control of Nonlinear Laser Pulse Propagation in Plasma with Strong Magnetic Fields by : Thomas Cunningham Wilson
Download or read book Control of Nonlinear Laser Pulse Propagation in Plasma with Strong Magnetic Fields written by Thomas Cunningham Wilson and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We examine nonlinear laser pulse dynamics in plasma, encompassing both transverse and longitudinal envelope effects, in isolation and when coupled by the plasma. This is underpinned by an interest in how strong magnetic fields, aligned along the laser axis, modify these processes.In the presence of a strong magnetic field, such that the electron cyclotron frequency is on the order of the laser frequency, there is dramatic modification to the laser-plasma interactions,with the electron motion under left circularly polarised light remaining weakly-relativistic-like at laser intensities typically associated with fully-relativistic behaviour. Conversely right circularly polarised light sees the opposite effect, with the laser-plasma interactions becoming nonlinear at much lower light intensities. This affects all processes underpinned by relativistic motion of the electrons, chiefly self-focusing and self-compression. Such processes are studied in detail for both unmagnetised and magnetised plasma, and the results are compared. We find that not only does an external field alter the relativistic response of the electrons, but it also modifies the laser group and phase velocities, making the pulse shape of interest to the envelope dynamics. We apply this to study spherical compression of a laser pulse, wherein the pulse dimensions reduce symmetrically towards a single cycle. This process results in greatly amplified single-cycle pulses in the lambda-cubic regime, which may peak at over 100 times the initial laser intensity. Finally, the process by which a fully relativistic pulse may amplify an existing magnetic field is examined. We find that while this effect is known of for Laguerre-Gaussian light, it can also occur for linearly polarised light. The pondero motive effect of the laser, and the external field trapping particles which would otherwise escape, bends their trajectories such that a self-sustaining azimuthal current forms. This current scales with both laser intensity and plasma density, and may produce fields of up to 10 kilotesla. We offer that this work may be of interest for the manipulation of low-power or long-wavelength lasers in underdense plasma, the generation of single-cycle pulses for high-harmonic generation and the generation of localised,quasistatic ultra-intense magnetic fields.
Book Synopsis Stark Broadening of Spectral Lines in Plasmas by : Eugene Oks
Download or read book Stark Broadening of Spectral Lines in Plasmas written by Eugene Oks and published by MDPI. This book was released on 2019-01-14 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Stark Broadening of Spectral Lines in Plasmas" that was published in Atoms
Download or read book زيتونة من بلادي written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Diagnostics for the Texas Petawatt Laser-plasma Accelerator by : Dongsu Du
Download or read book Diagnostics for the Texas Petawatt Laser-plasma Accelerator written by Dongsu Du and published by . This book was released on 2010 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 2004, table-top laser-plasma accelerators (LPAs) driven by ~30fs terwatt laser pulses have produced colimated, nearly mono-energetic eletron bunches with energy up to 1 GeV in laboratories around the world. Large-scale computer simulations show that LPAs can scale to higher energy while retaining high beam quality, but will require laser pulses of higher energy and longer duration than current LPAs. The group of Prof. Mike Downer, in collaboration with the Texas Petawatt (TPW) laser team headed by Prof. Todd Ditmire, is setting up an experiment that uses the TPW laser (1.1 PW, 150 fs) to drive the world's first multi-GeV LPA. This thesis provides a general overview of the TPW-LPA project, including several diagnostic systems for the beam, plasma and laser pulse. Special attention is given to three of the diagnostic systems: (1)A transverse interferometry diagnostic of the plasma density profile created by the TPW laser pulse; (2)A Thomson scattering diagnostic of the self-guided path of the TPW laser pulse through the plasma; (3)An optical transition radiation diagnostic of the accelerated electron bunch exiting the plasma. In each case, basic principles, theoretical background, calculation and simulation results, and preliminary experimental results will be presented.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722218492 Total Pages :42 pages Book Rating :4.2/5 (184 download)
Book Synopsis Experimental and Theoretical Study of Artificial Plasma Layers Produced by Two Intersecting Beams in a Chamber by : National Aeronautics and Space Administration (NASA)
Download or read book Experimental and Theoretical Study of Artificial Plasma Layers Produced by Two Intersecting Beams in a Chamber written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work done on the Bragg scattering of electromagnetic waves by microwave produced plasma layers is reported. Also summarized is the work accomplished on the propagation of high power microwave pulses in an air breakdown environment. Ongoing work on the theoretical model and numerical results of pulse propagation in air is also presented as are the results of studying the decay of plasma density and temperature. Kuo, S. P. and Zhang, Y. S. Unspecified Center NAG5-1051...
Author :National Academies of Sciences Engineering and Medicine Publisher : ISBN 13 :9780309677608 Total Pages :291 pages Book Rating :4.6/5 (776 download)
Book Synopsis Plasma Science by : National Academies of Sciences Engineering and Medicine
Download or read book Plasma Science written by National Academies of Sciences Engineering and Medicine and published by . This book was released on 2021-02-28 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma Science and Engineering transforms fundamental scientific research into powerful societal applications, from materials processing and healthcare to forecasting space weather. Plasma Science: Enabling Technology, Sustainability, Security and Exploration discusses the importance of plasma research, identifies important grand challenges for the next decade, and makes recommendations on funding and workforce. This publication will help federal agencies, policymakers, and academic leadership understand the importance of plasma research and make informed decisions about plasma science funding, workforce, and research directions.
