SPIKE: A Computer Model for the H2(D2) + F2 Pulsed Chemical Laser PDF Download
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Author: Joseph J. T. Hough
Publisher:
ISBN:
Category :
Languages : en
Pages : 87
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Book Description
A comprehensive rate equation model for a pulsed laser pumped by the H2(D2)-F2 reaction is described. This computer simulation incorporates up to 216 kinetic reactions to describe the laser medium, which is assumed to be homogeneous and contained in a Fabry-Perot optical cavity. The first fifteen vibrational-rotational P-branch transitions from each of the lowest ten vibrational bands are monitored for possible laser action. The distinctive features incorporated in this model include: (1) the elimination of the gain-equals-loss assumption, so that it is possible to predict cavity transients and to observe gain-intensity interactions; (2) a detailed model of the Lorentz broadening, including V, J dependence, as well as distinction between various perturbing species; (3) multiquantum HF (DF) self-deactivation, which in the HF case was found important to achieve good agreement between theory and experiment. Comparisons of the prediction of this model with several small-scale experiments have indicated generally good agreement (typically within approx. 20%). (Author).
Author: Joseph J. T. Hough
Publisher:
ISBN:
Category :
Languages : en
Pages : 87
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Book Description
A comprehensive rate equation model for a pulsed laser pumped by the H2(D2)-F2 reaction is described. This computer simulation incorporates up to 216 kinetic reactions to describe the laser medium, which is assumed to be homogeneous and contained in a Fabry-Perot optical cavity. The first fifteen vibrational-rotational P-branch transitions from each of the lowest ten vibrational bands are monitored for possible laser action. The distinctive features incorporated in this model include: (1) the elimination of the gain-equals-loss assumption, so that it is possible to predict cavity transients and to observe gain-intensity interactions; (2) a detailed model of the Lorentz broadening, including V, J dependence, as well as distinction between various perturbing species; (3) multiquantum HF (DF) self-deactivation, which in the HF case was found important to achieve good agreement between theory and experiment. Comparisons of the prediction of this model with several small-scale experiments have indicated generally good agreement (typically within approx. 20%). (Author).
Author: Ronald L. Kerber
Publisher:
ISBN:
Category :
Languages : en
Pages : 278
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Book Description
A computer modeling study of pulsed H2+F2 and D2+F2 chemical lasers has been conducted. This work was directed toward understanding the role of kinetic rotational relaxation and vibrational-rotational relaxation mechanisms in HF and DF lasers. This study resulted in very comprehensive computer models that could predict spectral characteristics of pulsed laser performance using kinetics rate equation data and experimental conditions. In addition, experiments were conducted on a flash initiated pulsed H2+F2 laser facility to generate data to compare with the models developed in this study. Models were also developed that demonstrated the performance of pulsed laser driven amplifiers and optical resonance transfer lasers. Finally, simple models were constructed that permit efficient prediction of pulse energy and pulse power. (Author).
Author: Ronald L. Kerber
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
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Book Description
A computer simulation of a pulsed HF laser pumped by the H2 + F2 chain reaction is presented. A chemical kinetic model encompassing 68 reactions is used to approximate the reacting mixture contained within an optical cavity. For each vibrational level, a Boltzmann distribution for the rotational levels is assumed with lasing on the vibrational band at line center of the transition having maximum gain. An analysis of cavity and chemical mechanisms yields a simple relationship between the pumping and depletion rates of the vibrational levels. This relationship is used to make a comprehensive study of the effects of cavity and chemical parameters on the laser pulse. The effect of changes in uncertain chemical reaction rate coefficients is assessed. (Author).
Author: Anatoli Sidorenko
Publisher: Springer Science & Business Media
ISBN: 364220158X
Category : Science
Languages : en
Pages : 340
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Book Description
This book demonstrates how the new phenomena in superconductivity on the nanometer scale (FFLO state, triplet superconductivity, Crossed Andreev Reflection, synchronized generation etc.) serve as the basis for the invention and development of novel nanoelectronic devices and systems. It demonstrates how rather complex ideas and theoretical models, like odd-pairing, non-uniform superconducting state, pi-shift etc., adequately describe the processes in real superconducting nanostructues and novel devices based on them. The book is useful for a broad audience of readers, researchers, engineers, PhD-students, lectures and others who would like to gain knowledge in the frontiers of superconductivity at the nanoscale.
Author: Farid Salama
Publisher:
ISBN:
Category : Astrophysics
Languages : en
Pages : 308
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Book Description
Author: Jean Demaison
Publisher: Springer Science & Business Media
ISBN: 9401008329
Category : Science
Languages : en
Pages : 355
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Book Description
Many satellites have recently been launched or are in preparation, which operate in the microwave to IR ranges, the main objective being to observe the earth's atmosphere or interstellar clouds. Analysis of the data they supply requires extensive laboratory work because we still only have sufficiently accurate data (line positions, intensities, and profiles) for only a few species. Furthermore, the observer community is making increasing calls for laboratory data, as new development open up new observational possibilities (such as submillimeter observation). Research on these subjects involves many different areas of specialisation in fields of research that generate a wealth of data. In Spectroscopy from Space the people responsible for field observations explain which results they are expecting from their measurements and how laboratory people can help them to analyse their satellite data. Laboratory spectroscopists explain why what they can do now, and what kinds of experiment and theoretical development that might undertake to meet the needs of the remote sensing community. The problems of distributing reliable laboratory data in a timely way are also addressed.
Author: J.T. Jones
Publisher: Springer Science & Business Media
ISBN: 9400979398
Category : Science
Languages : en
Pages : 359
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Book Description
The Origin and Evolution of Galaxies is the outstanding problem of modern cosmology. Fortunately. we have a firm cosmological framework on which to base our theories (the hot big bang) and recently there has been substantial progress in providing observations which potentially can constrain these theories. The problem of galaxy formation is. as a consequence. one involving many diverse branches of physics and astrophysics. It has been the aim of the school. and this compendium of lectures and seminars. to bring together these diverse aspects at a level enabling research workers to understand what is going on in other corners of the subject and to see how progress in each area impinges on the others. We are grateful to the contributors to this volume for allowing us considerable editorial license with their articles. We have attempted to provide a representative sample of the talks that were given at the school besides the texts of the invited lecturers. It is regrettable that for reasons of space we have had to leave out a number of other contributions.
Author: G. J. Ferland
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 600
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Book Description
Annotation This volume of proceedings from the November 2001 conference in Lexington contains fifty-two papers on atomic physics, numerical simulations, and observations. Specific papers address charge transfer, dielectronic recombination, atomic data formats, plasma dynamics, x-ray spectroscopy, black holes, and photo-ionization model nebulae. An abstract is supplied for each paper. The contributors are astronomers, physicists, and other scientists from North America, Europe, Brazil, and India. Annotation c. Book News, Inc., Portland, OR (booknews.com)
