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Spectroscopic Investigations Of Hard X Ray Emission From 120 Ps Laser Produced Plasmas At Intensities Near 10sup 17 W Cmsupminus2
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Book Synopsis Spectroscopic Investigations of Hard X-ray Emission from 120 Ps Laser-produced Plasmas at Intensities Near 10[sup 17] W Cm[sup[minus]2]. by :
Download or read book Spectroscopic Investigations of Hard X-ray Emission from 120 Ps Laser-produced Plasmas at Intensities Near 10[sup 17] W Cm[sup[minus]2]. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopic investigations of the x-ray emission of plasmas heated by 120 ps, frequency doubled pulses from the JANUS Nd: glass laser are presented. High Z K-shell spectra emitted from slab targets heated to near 10[sup 17] W cm[sup[minus]2] intensity are investigated. High resolution ([gamma]/[Delta][gamma]>5000) x-ray spectra of multicharged ions of H-like Ti, Co, Ni, Cu, and also H-like Sc in the spectral range 1.5--3.0[angstrom] are obtained in single laser shots using a spherically bent Mica crystal spectrograph with a 186 mm radius of curvature. The spectra- have one dimensional spatial resolution of about 25[mu]m and indicate that the size of the emission zone of the resonance, transitions is25[mu]m. Simultaneous x-ray images of the plasma from a charge-coupled device pinhole camera confirmed that the plasma x-ray emission is from a similar sized source. Survey spectra[gamma]/[Delta][gamma]=500--1000) taken with a flat LiF (200) crystal spectrometer with a charge-coupled device detector complement the high resolution data. Two dimensional LASNEX modeling of the laser target conditions indicate that the high K-shell charge states are produced in the hot dense region of the plasma with electron temperature2 keV and density[approximately]10[sup 22] cm[sup[minus]3]. These experiments demonstrate that with modest laser energy, plasmas heated by high-intensity 120 ps lasers provide a very bright source of hard[approximately]8 keV x-ray emission.
Book Synopsis Spectroscopic Investigations of Hard X-ray Emission from 120 Ps Laser-produced Plasmas at Intensities Near 1017 W Cm−2 by :
Download or read book Spectroscopic Investigations of Hard X-ray Emission from 120 Ps Laser-produced Plasmas at Intensities Near 1017 W Cm−2 written by and published by . This book was released on 1995 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis X-Ray Emission from CH2 Laser-Produced Plasmas at 10 to the 16th Power W/sq Cm by : D. G. Colombant
Download or read book X-Ray Emission from CH2 Laser-Produced Plasmas at 10 to the 16th Power W/sq Cm written by D. G. Colombant and published by . This book was released on 1979 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray spectra from CH2 laser-generated at 10 to the 16th power W/Sq cm are compared with those obtained using a 2D-mhd code. Good agreement is found over 7 orders of magnitude for X-ray energies comprised between 1 and 300 keV. It is found that the hard X-ray spectrum is compatible with the generation of B-fields in the interaction region. Variation of the numerical results with initial conditions, ion mass, laser energy deposition and grid size is investigated. (Author).
Book Synopsis X-ray Emission from Laser-produced Plasmas by :
Download or read book X-ray Emission from Laser-produced Plasmas written by and published by . This book was released on 1974 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The intensity and spectral characteristics of x-ray emitted from laser-produced plasmas have been investigated computatinoally and experimentally. a two-dimensional implosi code was used successfully to calculate laser-plasma radiation characteristics and to aid in the design of laser targets for high-yield x-ray production. Other computer codes, in use or under development predict lime strengths and energies for laser-plasma x-ray emission. An experimental effort is aimed at reliable measurements of x-ray yields and spectra. a wide variety of x-ray detection methods have been evaluated, and x-ray yields have been measured from plasmas produced with two dissimilar laser systems. The high energy x-ray spectrum, from about 10 to 140 keV, has been studied using high-gain scintillatino detectors and thick K-edge filters. Various supplementary measurements have provided information concerning characteristics of the target-reflected laser light, the ion energies, and the laser intensity patterns.
Book Synopsis Ultraviolet and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas by :
Download or read book Ultraviolet and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas written by and published by . This book was released on 1983 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Data Relating to X-ray Spectra by : National Research Council (U.S.). Committee on x-ray spectra
Download or read book Data Relating to X-ray Spectra written by National Research Council (U.S.). Committee on x-ray spectra and published by . This book was released on 1920 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in X-Ray Spectroscopy of Laser Plasmas by : Eugene Oks
Download or read book Advances in X-Ray Spectroscopy of Laser Plasmas written by Eugene Oks and published by . This book was released on 2020-07-06 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents advances in X-ray spectroscopy of plasmas interacting with a laser radiation and laser-induced plasmas. This research is practically important for the quest for the controlled nuclear fusion, for studying matter under extreme conditions, for providing atomic reference data, for laboratory modelling of physical processes in astrophysical objects, and for a better understanding of intense laser-plasma interactions. Advances in X-Ray Spectroscopy of Laser Plasmas significantly expands the scope of practical applications of X-ray spectroscopy of laser plasmas compared to traditional X-ray diagnostics of laser plasmas. The recent advances presented in this text make it possible to study the development of Langmuir waves, ion acoustic waves, transverse electromagnetic waves, parametric decay instabilities, as well as the rates of charge exchange between multicharged ions. Key Features Presents novel methods of X-Ray spectroscopy for both non-relativistic and relativistic laser-plasma interactions Includes methods of the X-Ray spectroscopy for measuring ultra-intense magnetic fields in laser plasmas Examines advanced designs of plasma-tunable X-ray lasers Demonstrates various analytical formalisms underlying the advances described in the book
Book Synopsis The Spectroscopy of X-rays by : Manne Siegbahn
Download or read book The Spectroscopy of X-rays written by Manne Siegbahn and published by . This book was released on 1925 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brief Summary of our Knowledge of X-rays up to Laue's Discovery. Interference of X-rays. Thechnique of X-ray Spectroscopy. Emission Spectra. Absorption Spectra. Systematic Arrangement and Theory of X-ray Spectra. The Continuous X-ray Spectrum. Other Methods of Evaluating the Inner Energy Levels of the Atoms. Appendix of Tables.
Book Synopsis Characterisation and Application of a Laser-based Hard X-ray Source by : Matthias Grätz
Download or read book Characterisation and Application of a Laser-based Hard X-ray Source written by Matthias Grätz and published by . This book was released on 1998 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book פרוש המשנה written by and published by . This book was released on 1485 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Increase of X-ray Intensities from Thin Foils Irradiated with a 200 TW Femtosecond Laser by :
Download or read book Nonlinear Increase of X-ray Intensities from Thin Foils Irradiated with a 200 TW Femtosecond Laser written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report, for the first time, that the energy of femtosecond optical laser pulses, E, with relativistic intensities I> 1021 W/cm2 is efficiently converted to X-ray radiation, which is emitted by "hot" electron component in collision-less processes and heats the solid density plasma periphery. As shown by direct high-resolution spectroscopic measurements X-ray radiation from plasma periphery exhibits unusual non-linear growth ~E4-5 of its power. The non-linear power growth occurs far earlier than the known regime when the radiation reaction dominates particle motion (RDR). Nevertheless, the radiation is shown to dominate the kinetics of the plasma periphery, changing in this regime (now labeled RDKR) the physical picture of the laser plasma interaction. Although in the experiments reported here we demonstrated by observation of KK hollow ions that X-ray intensities in the keV range exceeds ~1017 W/cm2, there is no theoretical limit of the radiation power. Therefore, such powerful X-ray sources can produce and probe exotic material states with high densities and multiple inner-shell electron excitations even for higher Z elements. Femtosecond laser-produced plasmas may thus provide unique ultra-bright X-ray sources, for future studies of matter in extreme conditions, material science studies, and radiography of biological systems.
Book Synopsis X-ray Spectroscopic Studies of Laser Produced Plasmas by : Ewan McLean Robertson
Download or read book X-ray Spectroscopic Studies of Laser Produced Plasmas written by Ewan McLean Robertson and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis X-ray Plasma Spectroscopy and the Properties of Multiply-charged Ions by : Igorʹ Ilʹich Sobelʹman
Download or read book X-ray Plasma Spectroscopy and the Properties of Multiply-charged Ions written by Igorʹ Ilʹich Sobelʹman and published by . This book was released on 1988 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Translated from the Russian original (published in 1987). Contributions present experimental data and theoretical methods of calculating the radiation and collisional characteristics of multiply-charged ions and the cross-sections and rates of the elementary processes that play an important-role in high-temperature plasma.
Book Synopsis Development of a Time-resolved Soft X-ray Spectrometer for Laser Produced Plasma Experiments by :
Download or read book Development of a Time-resolved Soft X-ray Spectrometer for Laser Produced Plasma Experiments written by and published by . This book was released on 2010 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 2400 line/mm variable spaced grating spectrometer (VSG) has been used to measure soft x-ray emission (8-22 Å) from laser-produced plasma experiments at Lawrence Livermore National Laboratory's Compact Multipulse Terrawatt (COMET) Laser Facility. The spectrometer was coupled to a Kentech x-ray streak camera to study the temporal evolution of soft x-rays emitted from the back of mylar and copper foils irradiated at 1015 W/cm2. The instrument demonstrated a resolving power of (almost equal to) 120 at 19 Å with a time resolution of 31 ps. The time-resolved copper emission spectrum was consistent with a photodiode monitoring the laser temporal pulse shape and indicated that the soft x-ray emission follows the laser heating of the target. The time and spectral resolution of this diagnostic make it useful for studies of high temperature plasmas.
Book Synopsis Space and Time Resolved Spectroscopy of Laser-produced Plasmas by : Bruce Kai Fong Young
Download or read book Space and Time Resolved Spectroscopy of Laser-produced Plasmas written by Bruce Kai Fong Young and published by . This book was released on 1988 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-resolution X-ray Spectroscopy of Hollow Atoms Created in Plasma Heated by Subpicosecond Laser Radiation by :
Download or read book High-resolution X-ray Spectroscopy of Hollow Atoms Created in Plasma Heated by Subpicosecond Laser Radiation written by and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigations of ultrashort (0.4-0.6 ps) laser pulse radiation interaction with solid targets have been carried out. The Trident subpicosecond laser system was used for plasma creation. The X-ray plasma emission was investigated with the help of high-resolution spectrographs with spherically bent mica crystals. It is shown that when high contrast ultrashort laser pulses were used for plasma heating its emission spectra could not be explained in terms of commonly used theoretical models, and transitions in so called {open_quotes}hollow atoms{close_quotes} must be taken into account for adequate description of plasma radiation.
Book Synopsis Space and Time Resolved Spectroscopy of Laser-produced Plasmas by :
Download or read book Space and Time Resolved Spectroscopy of Laser-produced Plasmas written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The determination of level populations and detailed population mechanisms in dense plasmas has become an increasingly important problem in atomic physics. In this work, the density variation of line intensities and level populations in aluminum K-shell and molybdenum and silver L-shell emission spectra have been measured from high-powered, laser-produced plasmas. For each case, the density dependence of the observed line emission is due to the effect of high frequency electron-ion collisions on metastable levels. The density dependent line intensities vary greatly in laser-produced plasmas and can be used to extract detailed information concerning the population kinetics and level populations of the ions. The laser-plasmas had to be fully characterized in order to clearly compare the observed density dependence with atomic theory predictions. This has been achieved through the combined use of new diagnostic instruments and microdot targets which provided simultaneously space, time, and spectrally resolved data. The plasma temperatures were determined from the slope of the hydrogen-like recombination continuum. The time resolved electron density profiles were measured using multiple frame holographic interferometry. Thus, the density dependence of K-shell spectral lines could be clearly examined, independent of assumptions concerning the dynamics of the plasma. In aluminum, the electron density dependence of various helium-like line intensity ratios were measured. Standard collisional radiative equilibrium models fail to account for the observed density dependence measured for the ''He/sub .cap alpha.//IC'' ratio. Instead, a quasi-steady state atomic model based on a purely recombining plasma is shown to accurately predict the measured density dependence. This same recombining plasma calculation successfully models the density dependence of the high-n ''He/sub .gamma.//He/sub .beta./'' and ''He/sub delta//He/sub .beta./'' helium-like resonance line intensity ratios.
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