Download or read book Extending the Validity Range of the Linear Fluid Description of Parametric Instabilities in Laser Produced Plasma written by A. C. Machacek and published by . This book was released on 2000 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Successful Candidates for the Degrees of D Phil M Litt M Sc and Diploma in Law with Titles of Their Theses written by University of Oxford and published by . This book was released on 1999 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2007 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Parametric Instabilities in Laser written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this LDRD was the study of parametric instabilities on a laser-produced plasma, addressing crucial issues affecting the coupling between the laser and the plasma. We have made very good progress during these three years, in advancing our understanding in many different fronts. Progress was made in both theoretical and experimental areas. The coupling of high-power laser light to a plasma through scattering instabilities is still one of the most complex processes in laser-plasma interaction physics. In spite of the relevance of these parametric processes to inertial confinement fusion (ICF) and all other situations where a high-power laser beam couples to a plasma, many aspects of the interaction remain unexplained, even after many years of intensive experimental and theoretical efforts. Important instabilities under study are stimulated Brillouin scattering (SBS), stimulated Raman scattering (SRS), and the Langmuir decay instability (LDI). The study of these instabilities is further complicated by the competition and interplay between them, and, in the case of ICF, by the presence of multiple overlapping interaction beams. Stimulated Brillouin scattering consists of the decay of the incident electromagnetic (EM) wave into a scattered EM wave and an ion acoustic wave (IAW). Similarly, SRS consists of the decay of the incident EM wave into a scattered EM wave and an electron plasma wave (EPW). Langmuir decay instability is the further decay of an EPW into a secondary EPW and an IAW. The principal areas of research covered during this three-year period were the following: a) Modeling of Parametric Instabilities in Speckles b) Langmuir Decay Instability c) Non Maxwellian Plasmas d) Multiple Interaction Beams e) SBS from Speckle Distributions.

Download or read book Hydrodynamic and Parametric Instabilities in a Long Scalelength Laser Produced Plasma written by and published by . This book was released on 1992 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book British National Bibliography for Report Literature written by and published by . This book was released on 2001 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Parametric Instabilities in Femtosecond Laser Produced Plasmas written by Laszlo Veisz and published by . This book was released on 2008-04-01 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-produced plasmas play an important role in plasma physics and fusion research. Parametric instabilities are the most important processes governing the laser-plasma interaction. Some parametric instabilities as two-plasmon decay or stimulated Raman scattering were investigated in this work using an optical signal, the so called 3/2 harmonics. As this harmonic originates from the plasma its characteristics provide important information about the plasma properties. The angular, spectral and temporal structure of this 3/2 harmonics were studied. Detailed theoretical analysis was made based on a new model to explain the measured results and to gain information about the generation process and the plasma.

Download or read book Plasmas at High Temperature and Density written by Heinrich Hora and published by . This book was released on 2000 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Parametric and Hydrodynamic Instabilities in Laser Produced Plasmas written by Shelly Nuruzzaman and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Linear Theory of Parametric Instabilities in Plasma written by Miklos Porkolab and published by . This book was released on 1972 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structuring Processes in Expanding Laser Produced Plasmas written by B. H. Ripin and published by . This book was released on 1988 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: A plasma expanding into a magnetic field and/or another plasma can undergo several instabilities which will cause spatial nonuniformities and large scale structure to develop. Potential structure forming instabilities include: various forms of the Rayleigh-Taylor or interchange instability, Kevin-Helmholtz instabilities. In addition, experimental geometric factors can also affect expansion uniformity. The phenomena reported here should be of interest to a broad range of disciplines. Keywords: Plasma, Rayleigh Taylor, Structure, Turbulence, Laser produced plasma.

Download or read book Parametric Instabilities in U V Laser produced Plasmas written by Kazuo A. Tanaka and published by . This book was released on 1982 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Parametric Instabilities in Femtosecond Laser produced Plasmas written by László Veisz and published by . This book was released on 2003 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Linear Theory of Parametric Instabilities in Plasma written by Miklos Porkolab and published by . This book was released on 1972 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Instabilities in a Confined Plasma written by A.B Mikhailovskii and published by CRC Press. This book was released on 1998-01-01 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instabilities in a Confined Plasma is entirely devoted to a theoretical exposition of the subject of plasma instabilities in confined systems. The book is an important contribution to the study of plasma instabilities, not only in fusion devices such as the Tokamak but also in astrophysical phenomena. It covers toroidal confinement systems, internal MHD modes, small-scale MHD instabilities, MHD internal kink modes, MHD modes in collisionless and neoclassical regimes, drift-MHD modes, external kink modes, and Alfven eigenmodes.

Download or read book Linear Conversion and Parametric Instabilities in a Nonuniform Plasma written by Hong Chul Kim and published by . This book was released on 1974 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new kind of parametric instability is observed in a nonuniform plasma in which a resonant rf electric field and a density cavity grow simultaneously through mutual enhancement. The threshold is observed to be virtually zero and the growth rate is linearly dependent on pump intensity. Ponderomotive force and wave trapping are observed to be the mechanisms which drive the instability. The effects of this instability on the linear conversion and the parametric instabilities are studied.

Download or read book Parametric Instabilities in Large Nonuniform Laser Plasmas written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of parametric instabilities in laser plasmas is of vital importance for inertial confinement fusion (ICF). The long scale-length plasma encountered in the corona of an ICF target provides ideal conditions for the growth of instabilities such as stimulated Brillouin scattering (SBS), stimulated Raman scattering (SRS), and filamentation. These instabilities can have detrimental effects in ICF and their characterization and understanding is of importance. Scattering instabilities are driven through a feedback loop by which the beating between the electromagnetic EM fields of the laser and the scattered light matches the frequency of a local longitudinal mode of the plasma. Any process which interferes with the coherence of this mechanism can substantially alter the behavior of the instability. Of particular interest is the study of laser beam smoothing techniques on parametric instabilities. These techniques are used to improve irradiation uniformity which can suppress hydrodynamic instabilities. Laser beam smoothing techniques have the potential to control the scattering level from parametric instabilities since they provide not only a smoother laser intensity distribution, but also reduced coherence. Beam smoothing techniques that affect the growth of parametric instabilities include spatial smoothing and temporal smoothing by laser bandwidth. Spatial smoothing modifies the phase fronts and temporal distribution of intensities in the focal volume. The transverse intensity spectrum is shifted towards higher spatial wavenumber and can significantly limit the growth of filamentation. Temporal smoothing reduces the coherence time and consequently limits the growth time. Laser bandwidth is required for most smoothing techniques, and can have an independent effect on the instabilities as well.