Download or read book Laser plasma Coupling Effects on Spectral Line Shapes written by and published by . This book was released on 2007 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Line Shapes Volume 8 12th ICSLS written by A. David May and published by American Institute of Physics. This book was released on 2000-04-14 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Includes full texts of about a dozen of the 25 invited papers and two-page abstracts of all 80 contributed papers. The emphasis is on the physical processes associated with the formation of spectral lines as observed in absorption and scattering of radiation by plasmas and neutral gases, though some papers consider related aspects. The sections cover special and general results of low-density plasmas, high to ultrahigh density plasmas, collision induced spectra, selective reflection and other line shapes, line mixing and far wing line shapes, broadening and shifting in neutrals and ions, excimers, and ultracold atoms. Reproduced from typescripts. Annotation c. by Book News, Inc., Portland, Or.
Download or read book Spectral Line Shapes in Plasmas written by and published by . This book was released on 2015 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Line-shape analysis is one of the most important tools for diagnostics of both laboratory and space plasmas. Its reliable implementation requires sufficiently accurate calculations, which imply the use of analytic methods and computer codes of varying complexity, and, necessarily, varying limits of applicability and accuracy. However, studies comparing different computational and analytic methods are almost non-existent. The Spectral Line Shapes in Plasma (SLSP) code comparison workshop series [1] was established to fill this gap. Numerous computational cases considered in the two workshops organized to date (in April 2012 and August 2013 in Vienna, Austria) not only serve the purpose of code comparison, but also have applications in research of magnetic fusion, astrophysical, laser-produced plasmas, and so on. Therefore, although the first workshop was briefly reviewed elsewhere [2], and will likely be followed by a review of the second one, it was unanimously decided by the participants that a volume devoted to results of the workshops was desired. It is the main purpose of this special issue.
Download or read book Spectral Line Shapes written by Józef Szudy and published by North Holland. This book was released on 1989 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Line Shapes in Astrophysics and Related Topics written by Milan S. Dimitrijević and published by MDPI. This book was released on 2020-02-18 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectral lines, widths, and shapes are powerful tools for emitting/absorbing gas diagnostics in different astrophysical objects (from the solar system to the most distant objects in the universe—quasars). On the other hand, experimental and theoretical investigations of laboratory plasma have been applied in spectroscopic astrophysical research, especially in research on atomic data needed for line shape calculations. Data on spectral lines and their profiles are also important for diagnostics, analysis, and the modelling of fusion plasma, laser-produced plasma, laser design and development, and various plasmas in industry and technology, like light sources based on plasmas or the welding and piercing of metals by laser-produced plasma. The papers from this book can be divided into four groups: 1. stark broadening data for astrophysical and laboratory plasma investigations; 2. applications of spectral lines for astrophysical and laboratory plasma research; 3. spectral line phenomena in extragalactic objects, and 4. laboratory astrophysics results for spectra investigation. The reviews and research papers, representing new research on the topics presented in this book, are of interest for specialists and PhD students. We hope that the present book will be useful and interesting for scientists interested in the investigation of spectral line shapes and will contribute to the education of young researchers and PhD students.
Download or read book Improving Calculations of the Interaction Between Atoms and Plasma Particles and Its Effect on Spectral Line Shapes written by Thomas Alexander Gomez and published by . This book was released on 2017 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectral line broadening has many applications in astrophysics and plasma physics. Calculations of line broadening are used in nearly all opacity models, which are then folded into atmosphere or radiative-transfer models, or used as density diagnostics in laboratory plasmas. However, there is evidence to suggest that spectral models are incomplete. For example, the experiment designed to measure the iron opacity at solar interior conditions has revealed significant discrepancies between measured and modeled opacities. Additionally, the determination of masses in white dwarfs using spectroscopic methods does not agree with other opacity-model-independent methods. Due to the challenging nature of line-broadening calculations, approximations are often employed in order to keep the calculation tractable. One approximation that will be examined in this thesis is how charged plasma particles (electrons, ions, and atoms) are assumed to interact with each other. These charged plasma particles interact via a Coulomb potential; in low-density plasmas, this can be approximated by a second-order Taylor expansion, and the plasma particles are assumed to be always outside the radiator (dipole approximation). The dipole approximation is used extensively throughout spectral line-broadening calculations---even beyond its validity criteria. In this dissertation, I am improving the treatment of the interaction between the radiator and the plasma particles for close interactions and will focus on an accurate treatment of penetrating collisions of plasma particles with the radiator. The first improvement is to examine when the higher-order Taylor terms become important and when the dipole-only approximation breaks down. I further explore the effects of penetrating collisions due to electrons and ions. At extremely high densities, the wave behavior of quantum electrons starts to become important. As a first test of the quantum theory of electron collisions with penetration, I attempted to create correspondence between the new quantum calculation and semi-classical calculations in a regime where quantum effects aren't important. However, I could not create correspondence without the Pauli exclusion (which has been neglected in previous calculations): since electrons exist in both the plasma and the atom, the quantum repulsion of electrons (due to being spin-1/2 particles) needed to be included explicitly. There are also additional terms present in the broadening operator which have been previously neglected and considered for the first time here. I also explore the effect of penetrating collisions due to ions, for it is this treatment that is important for calculations of line merging and continuum lowering (sometimes called ionization potential depression)---a hotly debated physical effect. While I include many improvements in this thesis, it is in no way complete; there are many other untested effects that are commonly used in spectral-line broadening calculations. I conclude by showing some of the astrophysical implications specifically to white dwarfs.
Download or read book Spectral Line Shapes written by Eugene Oks and published by American Institute of Physics. This book was released on 2006-12-07 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of spectral line shapes, on the fundamental side, reveal the underlying atomic and molecular interactions. On the practical side, they are employed as powerful diagnostic tools for energy pursuit via controlled fusion, for technological gas discharges, for the atmosphere of the Earth, the Sun, and other stars.
Download or read book Stark Broadening of Hydrogen and Hydrogenlike Spectral Lines in Plasmas written by Evgeniĭ Aleksandrovich Oks and published by Alpha Science International, Limited. This book was released on 2006 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Stark broadening of spectral lines in plasmas belongs to the highest level of plasma spectroscopy and is consequently its most complicated subject. This book presents analytical advances into this problem, thus yielding a physical insight.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1983 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1969 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Bureau of Standards 1968 1969 written by Betty L. Oberholtzer and published by . This book was released on 1970 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fusion Energy Update written by and published by . This book was released on 1980 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lasers and Masers a Continuing Bibliography written by United States. National Aeronautics and Space Administration and published by . This book was released on 1965 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lasers and Masers written by and published by . This book was released on 1965 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Research of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1977 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
