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Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (946 download)
Download or read book Determination of Electron Density and Ionic Temperature of Laser Produced Plasma on Polymeric Materials written by and published by . This book was released on 1996 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David H. Plemmons
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (317 download)
Download or read book Electron Density and Temperature Determination of a Laser-induced Plasma in Hydrogen Gas written by David H. Plemmons and published by . This book was released on 1994 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. W. Ali
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (837 download)
Download or read book The Electron Density and Temperature in the Photoionized Background Gas (N2) Surrounding a Laser Produced Plasma written by A. W. Ali and published by . This book was released on 1984 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A scheme is presented for the determination of the electron density and temperature in a background gas surrounding a laser produced plasma. The background gas (N2) is photoionized by the ionizing radiation from the laser produced plasma. Band intensities of 3914A and 3371A from N2(+) and N2 are utilized for the determination of the state of the background plasma. (Author).
Author : Winston Kent Pendleton
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (35 download)
Download or read book Determination of Spatial and Temporal Electron Density and Temporal Electron Temperature in Laser-produced Gaseous Deuterium Plasmas written by Winston Kent Pendleton and published by . This book was released on 1971 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Winston Kent Pendleton (III.)
Publisher :
ISBN 13 :
Total Pages : 101 pages
Book Rating : 4.:/5 (227 download)
Download or read book Determination of Spatial and Temporal Electron Density and Temporal Electron Temperature in Laser-Produced Gaseous Deuterium Plasmas written by Winston Kent Pendleton (III.) and published by . This book was released on 1971 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The temporal and spatial electron density distribution and the temporal variation of electron temperature have been determined in gaseous deuterium plasmas produced by a laser. In addition to these measurements, made during laser irradiation of the plasma, the plasma growth rate, laser-plasma absorption and reflection interaction, and pressure dependence of laser intensity breakdown threshold have been determined. A time-variable reflectivity ruby laser with a pulse duration of 4 nanoseconds was employed in these experiments at gas pressures from 100 to 600 torr. The electron density and temperature measurements represent a major addition to the data available on laser-produced plasmas. (Author).
Author : William F. Leonard
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (31 download)
Download or read book Determination of Plasma Temperature and Electron Density Distributions Using Millimeter Waves written by William F. Leonard and published by . This book was released on 1965 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Heinrich Hora
Publisher :
ISBN 13 :
Total Pages : 468 pages
Book Rating : 4.:/5 (318 download)
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:
Author :
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ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (727 download)
Download or read book A New Diagnostic Technique to Simultaneously Measure the Electron Temperature, Ionic Charge State, and Plasma Density Near the Critical Surface in Laser-plasma Interaction Experiments. Final Report written by and published by . This book was released on 1990 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied the dependence of the second harmonic signature of the ion acoustic decay instability on the target material in laser produced plasmas. Well-defined Stokes peaks were observed. The Stokes peaks were especially sharp for high Z targets. The threshold of the IADI was quite low even in high Z plasma. It increased only weakly with increasing the atomic number. On the other hand, the Stokes intensity decreased strongly with increasing atomic number. Linear theory, combined with the results of hydrodynamic-computer-simulation (LASNEX) calculation, explained our experimental results fairly well. The effective laser intensity is strongly reduced by the increased collisionaldamping of electron plasma wave in high Z plasma, so that the Stokes intensity was reduced strongly. Hence, strong electron heating due to the IADI is less likely in high Z plasma. On the other hand, in the context of the threshold, the collisional damping effect of the electron plasma wave is canceled due to the opposite trend of the damping of the ion acoustic wave which decreases with ZT{sub e}/T{sub i}. The low-threshold, and the sharp and steady spectrum make the IADI a good diagnostic of local plasma conditions near the critical surface for high Z plasma. The ionic charge state Z is estimated by measuring the ion acoustic wave frequency of the most unstable wave excited by the IADI. For Mo plasma, we had measured value of Z=30. We can also estimate the plasma density of the instability region using Bohm-Gross dispersion relation of the plasma wave. We have obtained plasma density N{sub e}/N{sub c} = 0.86. We have estimated plasma flow effects on the LADI by measuring the angular distribution of the IADI emission. Our results indicate that the flow effect is not important for the IADI in our experiments.
Author :
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (727 download)
Download or read book A New Diagnostic Technique to Simultaneously Measure the Electron Temperature, Ionic Charge State, and Plasma Density Near the Critical Surface in Laser-plasma Interaction Experiments written by and published by . This book was released on 1990 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied the dependence of the second harmonic signature of the ion acoustic decay instability on the target material in laser produced plasmas. Well-defined Stokes peaks were observed. The Stokes peaks were especially sharp for high Z targets. The threshold of the IADI was quite low even in high Z plasma. It increased only weakly with increasing the atomic number. On the other hand, the Stokes intensity decreased strongly with increasing atomic number. Linear theory, combined with the results of hydrodynamic-computer-simulation (LASNEX) calculation, explained our experimental results fairly well. The effective laser intensity is strongly reduced by the increased collisionaldamping of electron plasma wave in high Z plasma, so that the Stokes intensity was reduced strongly. Hence, strong electron heating due to the IADI is less likely in high Z plasma. On the other hand, in the context of the threshold, the collisional damping effect of the electron plasma wave is canceled due to the opposite trend of the damping of the ion acoustic wave which decreases with ZT{sub e}/T{sub i}. The low-threshold, and the sharp and steady spectrum make the IADI a good diagnostic of local plasma conditions near the critical surface for high Z plasma. The ionic charge state Z is estimated by measuring the ion acoustic wave frequency of the most unstable wave excited by the IADI. For Mo plasma, we had measured value of Z=30. We can also estimate the plasma density of the instability region using Bohm-Gross dispersion relation of the plasma wave. We have obtained plasma density N{sub e}/N{sub c} = 0.86. We have estimated plasma flow effects on the LADI by measuring the angular distribution of the IADI emission. Our results indicate that the flow effect is not important for the IADI in our experiments.
Author : S. N. Amor
Publisher :
ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (742 download)
Download or read book Electron Density and Temperature Diagnostic of Laser Created Titanium Plasma written by S. N. Amor and published by . This book was released on 2003 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this contribution we present time and space evolution of plasma parameters during ablation of titanium target in vacuum and at low nitrogen pressure using KrF laser. Electron density is measured from Stark Broadening of singly ionized species; electron temperature is determined from Boltzmann plot of lines intensities of the same species.
Download or read book Electron Density Determination of Aluminium Laser-induced Plasma written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. Ross
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (316 download)
Download or read book Local Measurement of Electron Density and Temperature in High Temperature Laser Plasma Using the Ion-Acoustic Dispersion written by S. Ross and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dispersion of ion-acoustic fluctuations has been measured using a novel technique that employs multiple color Thomson-scattering diagnostics to measure the frequency spectrum for two separate thermal ion-acoustic fluctuations with significantly different wave vectors. The plasma fluctuations are shown to become dispersive with increasing electron temperature. We demonstrate that this technique allows a time resolved local measurement of electron density and temperature in inertial confinement fusion plasmas.
Author : Ladislaus S. Lubaczewski (Jr.)
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (13 download)
Download or read book Determination of the Electron Density in an Argon Plasma Using a Laser Interferometer written by Ladislaus S. Lubaczewski (Jr.) and published by . This book was released on 1967 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (727 download)
Download or read book Feasibility of Measuring Density and Temperature of Laser Produced Plasmas Using Spectroscopic Techniques written by and published by . This book was released on 2008 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wide variety of experiments on the Z-Beamlet laser involve the creation of laser produced plasmas. Having a direct measurement of the density and temperature of these plasma would an extremely useful tool, as understanding how these quantities evolve in space and time gives insight into the causes of changes in other physical processes, such as x-ray generation and opacity. We propose to investigate the possibility of diagnosing the density and temperature of laser-produced plasma using temporally and spatially resolved spectroscopic techniques that are similar to ones that have been successfully fielded on other systems. Various researchers have measured the density and temperature of laboratory plasmas by looking at the width and intensity ratio of various characteristic lines in gases such as nitrogen and hydrogen, as well as in plasmas produced off of solid targets such as zinc. The plasma conditions produce two major measurable effects on the characteristic spectral lines of that plasma. The 1st is the Stark broadening of an individual line, which depends on the electron density of the plasma, with higher densities leading to broader lines. The second effect is a change in the ratio of various lines in the plasma corresponding to different ionization states. By looking at the ratio of these lines, we can gain some understanding of the plasma ionization state and consequently its temperature (and ion density when coupled with the broadening measurement). The hotter a plasma is, the higher greater the intensity of lines corresponding to higher ionization states. We would like to investigate fielding a system on the Z-Beamlet laser chamber to spectroscopically study laser produced plasmas from different material targets.
Author : Margaret Weston
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (838 download)
Download or read book Determination of the Electron Density and Temperature of a Plasma by the Application of Line-broadening Theory to Observed Line Profiles written by Margaret Weston and published by . This book was released on 1971 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank J. Allen
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (227 download)
Download or read book A Description of Laser-produced Plasmas. I. Electron and Ion Temperatures written by Frank J. Allen and published by . This book was released on 1968 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method is derived for obtaining ion temperature in laser-produced plasmas from experimental results. Ion temperatures are then obtained from published data. Various determinations of electron temperatures in similar plasmas are considered. It is found that for incident laser beam intensities on solid targets in the range of 10 to the 10th or 11th power watts per square centimeter, electron and ion temperature lie between 10 and 20 electron volts. Means of improving experimental results, on which the ion temperature determinations are based, are also discussed. (Author).
Author : O. Auciello
Publisher : Springer
ISBN 13 : 0792305841
Total Pages : 558 pages
Book Rating : 4.7/5 (923 download)
Download or read book Plasma-Surface Interactions and Processing of Materials written by O. Auciello and published by Springer. This book was released on 1990-01-31 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: An understanding of the processes involved in the basic and applied physics and chemistry of the interaction of plasmas with materials is vital to the evolution of technologies such as those relevant to microelectronics, fusion and space. The subjects dealt with in the book include: the physics and chemistry of plasmas, plasma diagnostics, physical sputtering and chemical etching, plasma assisted deposition of thin films, ion and electron bombardment, and plasma processing of inorganic and polymeric materials. The book represents a concentration of a substantial amount of knowledge acquired in this area - knowledge which was hitherto widely scattered throughout the literature - and thus establishes a baseline reference work for both established and tyro research workers.
