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Electron Density And Temperature Diagnostic Of Laser Created Titanium Plasma
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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 Determination of Electron Density and Ionic Temperature of Laser Produced Plasma on Polymeric Materials by :
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:
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.
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 Determination of Spatial and Temporal Electron Density and Temporal Electron Temperature in Laser-Produced Gaseous Deuterium Plasmas by : Winston Kent Pendleton (III.)
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).
Book Synopsis Electron Density and Temperature Determination of a Laser-induced Plasma in Hydrogen Gas by : David H. Plemmons
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:
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.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-03 with total page 938 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 1982-04 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book X-Ray Lasers 2004 written by J Zhang and published by CRC Press. This book was released on 2005-06-15 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-Ray Lasers 2004 comprises invited, contributed, and poster papers presented at the 9th International Conference on X-Ray Lasers (ICXRL2004) held in Beijing in May 2004. Some 120 participants from 13 countries and regions met in Beijing to compare results and exchange views on future developments in x-ray lasers and related fields. The book covers the following topics: overviews of x-ray lasers research, collisionally pumped x-ray lasers, capillary discharge-pumped x-ray lasers, OFI and photo-pumped x-ray lasers, high-order harmonics XUV radiation, grazing incidence pumping x-ray lasers, theory and simulations of x-ray lasers and plasma media, free-electron lasers and accelerator-based x-ray sources, alternative pumping schemes for x-ray lasers, applications of x-ray lasers and other bright x-ray sources, x-ray optics and instrumentation, investigations of x-ray laser media, and developments of x-ray laser drivers. X-Ray Lasers 2004 provides not only an overview and an up-to-date progress report on this fast moving field, but also important reference material on which future work can be built.
Book Synopsis Many-body Approaches at Different Scales by : G.G.N Angilella
Download or read book Many-body Approaches at Different Scales written by G.G.N Angilella and published by Springer. This book was released on 2018-03-24 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a collection of invited research and review contributions on recent advances in (mainly) theoretical condensed matter physics, theoretical chemistry, and theoretical physics. The volume celebrates the 90th birthday of N.H. March (Emeritus Professor, Oxford University, UK), a prominent figure in all of these fields. Given the broad range of interests in the research activity of Professor March, who collaborated with a number of eminent scientists in physics and chemistry, the volume embraces quite diverse topics in physics and chemistry, at various dimensions and energy scales. One thread connecting all these topics is correlation in aggregated states of matter, ranging from nuclear physics to molecules, clusters, disordered condensed phases such as the liquid state, and solid state physics, and the various phase transitions, both structural and electronic, occurring therein. A final chapter leaps to an even larger scale of matter aggregation, namely the universe and gravitation. A further no less important common thread is methodological, with the application of theoretical physics and chemistry, particularly density functional theory and statistical field theory, to both nuclear and condensed matter.
Book Synopsis The Electron Density and Temperature in the Photoionized Background Gas (N2) Surrounding a Laser Produced Plasma by : A. W. Ali
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).
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Relativistic Electron Beam Plasma Heating Experiment by : Michael D. Montgomery
Download or read book The Relativistic Electron Beam Plasma Heating Experiment written by Michael D. Montgomery and published by . This book was released on 1980 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: An intense (5 x 105 Amp/cm2), relativistic (5 MeV), electron beam will be used to investigate the heating of small volumes (~5 to 10 cm3) of dense plasma (1017-- 1018 electrons/cm3) to kilovolt temperatures via the electrostatic two-stream instability.
Book Synopsis Government Reports Announcements by :
Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
