Investigation of Physical and Spectral Characteristics of Laser-induced Plasmas PDF Download
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Author: Vincent P. Hohreiter
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
ABSTRACT: The physical and optical characteristics of laser-induced plasmas (LIP) and the precision of measurements using laser-induced breakdown spectroscopy (LIBS) for aerosol and gas phase species are explored. In a series of coherent experiments properties of the LIP and the temporal, spatial, and energetic variations of interactions with entrained particles (aerosols) are evaluated from both a standpoint of basic plasma science and applied atomic spectroscopy. First, the evolution of a LIP is characterized in terms of its temporally-resolved spectral absorptivity, spectral emissivity, and free electron density during the first 500 nanoseconds. Transmission measurements reveal near opacity of the LIP at early times (10-50 ns) and essential transparency at longer times (500 ns).
Author: Vincent P. Hohreiter
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
ABSTRACT: The physical and optical characteristics of laser-induced plasmas (LIP) and the precision of measurements using laser-induced breakdown spectroscopy (LIBS) for aerosol and gas phase species are explored. In a series of coherent experiments properties of the LIP and the temporal, spatial, and energetic variations of interactions with entrained particles (aerosols) are evaluated from both a standpoint of basic plasma science and applied atomic spectroscopy. First, the evolution of a LIP is characterized in terms of its temporally-resolved spectral absorptivity, spectral emissivity, and free electron density during the first 500 nanoseconds. Transmission measurements reveal near opacity of the LIP at early times (10-50 ns) and essential transparency at longer times (500 ns).
Author: A. I. Korunchikov
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
This is a continuation of earlier work dealing with the plasma flare produced when a laser beam is focused on a substance, and particularly with the effect of the laser energy, the beam focusing, the pressure of the atmosphere surrounding the investigated sample, and the properties of the sample itself on the character of the plasma. The present article is devoted to the influence of the same effects on the spectral characteristics of the plasma. The tests were made by focusing the emission of a GSI-1 laser, operating in the free-running mode on the surface of metallic samples. The variation of the intensity along the plasma flare was determined by projecting the image of the flare on the slit of an ISP-22 spectrograph. At atmospheric pressure, the intensities of the spectral lines increased rapidly with increasing distance between the plasma flare and the surface of the sample, reaching a maximum at distances that depended on the excitation energy.
Author:
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 258
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Book Description
Author: Leon J. Radziemski
Publisher: CRC Press
ISBN: 1000147371
Category : Technology & Engineering
Languages : en
Pages : 474
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Book Description
This book discusses the physics of plasma initiation and reviews the features of dissipating, propagating plasmas. It deals with advances in diagnostics for high-energy, laser-fusion plasmas. The book reviews the basic physical processes, plasma characteristics of the "continuous optical discharge".
Author: Andrzej W. Miziolek
Publisher:
ISBN: 9780511246692
Category : Laser spectroscopy
Languages : en
Pages : 640
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Book Description
This is the first comprehensive reference explaining the fundamentals of the LIBS phenomenon, its history and its fascinating applications across eighteen chapters written by recognized leaders in the field. This book will be of significant interest to researchers in chemical and materials analysis within academia and industry.
Author: Gábor Galbács
Publisher: Springer Nature
ISBN: 303114502X
Category : Science
Languages : en
Pages : 312
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Book Description
This book offers a comprehensive overview of recent advances in the area of laser-induced breakdown spectroscopy (LIBS), focusing on its application to biological, forensic and materials sciences. LIBS, which was previously mainly used by physicists, chemists and in the industry, has now become a very useful tool with great potential in these other fields as well. LIBS has a unique set of characteristics including minimal destructiveness, remote sensing capabilities, potential portability, extremely high information content, trace analytical sensitivity and high throughput. With its content divided into two main parts, this book provides not only an introduction to the analytical capabilities and methodology, but also an overview of the results of recent applications in the above fields. The application-oriented, multidisciplinary approach of this work is also reflected in the diversity of the expert contributors. Given its breadth, this book will appeal to students, researchers and professionals interested in solving analytical/diagnostic/material characterization tasks with the application of LIBS.
Author: Janice L. Bishop
Publisher: Cambridge University Press
ISBN: 110718620X
Category : Language Arts & Disciplines
Languages : en
Pages : 655
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Book Description
Comprehensive overview of the spectroscopic, mineralogical, and geochemical techniques used in planetary remote sensing.
Author: Rashid A. Ganeev
Publisher: John Wiley & Sons
ISBN: 1119472350
Category : Science
Languages : en
Pages : 371
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Book Description
A comprehensive guide to a new technology for enabling high-performance spectroscopy and laser sources Resonance Enhancement in Laser-Produced Plasmas offers a guide to the most recent findings in the newly emerged field of resonance-enhanced high-order harmonic generation using the laser pulses propagating through the narrow and extended laser-produced plasma plumes. The author—a noted expert in the field—presents an introduction and the theory that underpin the roles of resonances in harmonic generation. The book also contains a review of the most advanced methods of plasma harmonics generation at the conditions of coincidence of some harmonics, autoionizing states, and some ionic transitions possessing strong oscillator strengths. Comprehensive in scope, this text clearly demonstrates the importance of resonance-enhanced nonlinear optical effects leading to formation of efficient sources of coherent extreme ultraviolet radiation that can be practically applied. This important resource: Puts the focuses on novel applications of laser-plasma physics, such as the development of ultrashort-wavelength coherent light sources Details both the theoretical and experimental aspects of higher-order harmonic generation in laser-produced plasmas Contains information on early studies of resonance enhancement of harmonics in metal-ablated plasmas Analyzes the drawbacks of different theories of resonant high order harmonic generation Includes a discussion of the quasi-phase-matching and properties of semiconductor plasmas Written for researchers and students in the fields of physics, materials science, and electrical engineering who are interested in laser physics and optics, Resonance Enhancement in Laser-Produced Plasmas offers an introduction to the topic and covers recent experimental studies of various resonance processes in plasmas leading to enhancement of single harmonic.
Author: Mahmoud Dawood
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Farid Abdel-Rahim
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659186004
Category :
Languages : de
Pages : 140
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Book Description
Laser-induced plasma spectroscopy (LIPS), is being used as an analytical method by a growing number of research groups. In the present work we study the effect of the laser beam energy on the properties of the plasma generated by focusing an intense laser beam on Al solid target in air at atmospheric pressure. Plasma is generated using Nd: YAG pulsed laser at 1064 nm wavelength, 6 ns pulse duration with maximum pulse energy of 750mJ. The emission spectrum is collected using an Echelle spectrometer equipped with ICCD camera Andor type. Measurements of temperature and electron density of the produced plasmas at different laser energies and at different delay times are described using different emission spectral lines. Based on LTE assumption, excitation temperature is determined from the Boltzmann plot using O I spectral lines at 777.34, 794.93, and 848.65 nm and the electron density are determined from Stark width of Al II at 281.6 and 466.3 nm. The determined density is compared with the density determined from HQ, spectral line
