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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
Download 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 full books in PDF, epub, and Kindle. Read online 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 ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis 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 by :
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.
Book Synopsis 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 by :
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.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 1468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A New Electron Temperature Diagnostic of Critical Surface Based on the Ion Acoustic Decay Instability in Hot, High Density Plasma Relevant to Laser Fusion. Semiannual Report, April 1--September 29, 1994 by :
Download or read book A New Electron Temperature Diagnostic of Critical Surface Based on the Ion Acoustic Decay Instability in Hot, High Density Plasma Relevant to Laser Fusion. Semiannual Report, April 1--September 29, 1994 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors made analysis of the IADI experiments previously made using OMEGA laser system. They obtained two important new results: the first direct observation of the epw excited by the Ion Acoustic Decay Instability, and the first study of the IADI in a plasma that approaches laser-fusion conditions, in the sense of having a density scale length of order 1 mm and an electron temperature, T[sub e], in excess of 1 keV. Previous observations of the epw's have been based on the second harmonic emission, from which little can be inferred because the emission is produced by unknown pairs of epw's, integrated in a complicated way over wavenumber space and real space. In contrast, they have directly observed the epw by using the 90[degree], collective Thomson scattering (CTS) of a UV laser (at the third harmonic of the pump) from the epw's. Because the ratio of probe frequency to electron plasma frequency is only about three, the scattering is collective (i.e. k[sub epw][lambda][sub De] is small, where k[sub epw] is the epw wave number and[lambda][sub De] is the Debye length), m even though the scattering angle is large. The electron temperature can then be deduced from the ion sound velocity, obtained from the measurement of the frequency at which growth is maximum at the scattering wavenumber.
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1993 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Energy Research and Development Administration. Technical Information Center Publisher : ISBN 13 : Total Pages :982 pages Book Rating :4.3/5 (129 download)
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration. Technical Information Center
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1977 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Plasma Processing of Materials by : National Research Council
Download or read book Plasma Processing of Materials written by National Research Council and published by National Academies Press. This book was released on 1991-02-01 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma processing of materials is a critical technology to several of the largest manufacturing industries in the worldâ€"electronics, aerospace, automotive, steel, biomedical, and toxic waste management. This book describes the relationship between plasma processes and the many industrial applications, examines in detail plasma processing in the electronics industry, highlights the scientific foundation underlying this technology, and discusses education issues in this multidisciplinary field. The committee recommends a coordinated, focused, and well-funded research program in this area that involves the university, federal laboratory, and industrial sectors of the community. It also points out that because plasma processing is an integral part of the infrastructure of so many American industries, it is important for both the economy and the national security that America maintain a strong leadership role in this technology.
Book Synopsis Survey of Diagnostic Techniques Used to Determine Temperature and Density in Plasmas by : L. D. DICKSON
Download or read book Survey of Diagnostic Techniques Used to Determine Temperature and Density in Plasmas written by L. D. DICKSON and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary is given of the three major plasma diagnostic techniques (probes, microwaves, and spectroscopy) presently used to determine electron, ion, and gas temperature, and electron and ion density. A review of the theory for each technique is given and the relative advantagesAND DISADVANTAGES OF EACH TECHNIQUE ARE DISCUSSED. A comparative examination is made to determine the areas of greatest applicability of each technique. (Author).
Book Synopsis Local Measurement of Electron Density and Temperature in High Temperature Laser Plasma Using the Ion-Acoustic Dispersion by : S. Ross
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.
Book Synopsis Documentation of Plasma Physics. Pt. 1, Experimental Plasma Physics [and] Theoretical Plasma Physics by :
Download or read book Documentation of Plasma Physics. Pt. 1, Experimental Plasma Physics [and] Theoretical Plasma Physics written by and published by . This book was released on 1975 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time-dependent Electron Temperature Diagnostics for High-power, Aluminum Z-pinch Plasmas by :
Download or read book Time-dependent Electron Temperature Diagnostics for High-power, Aluminum Z-pinch Plasmas written by and published by . This book was released on 1996 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-resolved x-ray pinhole photographs and time-integrated radially-resolved x-ray crystal spectrometer measurements of azimuthally-symmetric aluminum-wire implosions suggest that the final pinch is composed of a hot dense plasma core surrounded by a cooler plasma halo. The slope of the free-bound x-ray continuum measured using filtered photoconducting diodes, provides a time-resolved, model-independent diagnostic of the core electron temperature. A simultaneous measurement of the time-resolved K-shell line spectra provides a diagnostic to indirectly measure the electron temperature of the plasma halo. Together, measurements from the two diagnostics lend support to a picture that also emerges from a 1-D Rad-Hydro model; namely, that of a plasma whose thermalization on axis produces steep radial gradients in temperature, where the temperatures are substantially in excess of a kilovolt in the core and below a kilovolt in the surrounding plasma halo.
Book Synopsis Frontiers in High Energy Density Physics by : National Research Council
Download or read book Frontiers in High Energy Density Physics written by National Research Council and published by National Academies Press. This book was released on 2003-05-11 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent scientific and technical advances have made it possible to create matter in the laboratory under conditions relevant to astrophysical systems such as supernovae and black holes. These advances will also benefit inertial confinement fusion research and the nation's nuclear weapon's program. The report describes the major research facilities on which such high energy density conditions can be achieved and lists a number of key scientific questions about high energy density physics that can be addressed by this research. Several recommendations are presented that would facilitate the development of a comprehensive strategy for realizing these research opportunities.
Book Synopsis Electron Density and Temperature Diagnostic of Laser Created Titanium Plasma by : S. N. Amor
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.
Book Synopsis Simultaneous Measurement of Spatially Resolved Electron Temperatures. Electron Number Densities and Gas Temperatures by Laser Light Scattering from the ICP. by : Mao Huang
Download or read book Simultaneous Measurement of Spatially Resolved Electron Temperatures. Electron Number Densities and Gas Temperatures by Laser Light Scattering from the ICP. written by Mao Huang and published by . This book was released on 1989 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spatially resolved electron temperatures, electron number densities and gas-kinetic temperatures have been determined at five observation heights, nine radial positions, and two settings of RF input power in an aerosol-free argon ICP sustained with a commercial MAK torch. The measurements were obtained by means of simultaneous ruby-laser Thomson scattering the Rayleigh scattering. In the central channel of the ICP the electron temperature ranges from 7000 K to 8500 K, the gas kinetic temperature is about 1000 K from 1.9 to 7.0 x ten to the 15th power/cc. Among the measured parameters, the electron number density is most sensitive to the input RF power and is noticeable and the Saha equation. The overpopulation-electron recombination processes, resulting in a recombining plasma in the analytical zone. This non-LTE feature might be significant for excitation and ionization mechanisms in the ICP. Keywords: Inductively coupled plasma; Combination diagnostics; Thomson scattering; Rayleigh scattering. (jhd).
Book Synopsis Atomic Beam Plasma Diagnostics by : Kaare J. Nygaard
Download or read book Atomic Beam Plasma Diagnostics written by Kaare J. Nygaard and published by . This book was released on 1973 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report is concerned with the application of atomic and ionic beams for measurement of electron density and temperature of fusion plasma. The average electron density is determined from the attenuation of an atomic beam. Spectroscopic line ratio measurements along the beam provide information about the electron temperature distribution. Single shot measurements can be made and the data handling automated with an Optical Multichannel Analyzer. The electron density distribution can best be measured with an ion beam. The plasma potential can be determined exactly from the energy difference between secondary and primary ions. Four appendices include completed research on photo- and electron-impact ionization as well as properties of GaAs lasers. (Author).
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
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