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X Ray Laser Interferometry For Probing High Density Plasmas
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Book Synopsis X-ray Laser Interferometry for Probing High-density Plasmas by :
Download or read book X-ray Laser Interferometry for Probing High-density Plasmas written by and published by . This book was released on 1995 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collisionally pumped soft x-ray lasers now operate over a wavelength range extending from 4-40 nm. With the recent advances in the development of multilayer mirrors and beamsplitters in the soft x-ray regime, the authors can utilize the unique properties of x-ray lasers to study large, rapidly evolving laser-driven plasmas with high electron densities. Using a neon-like yttrium x-ray laser which operates at a wavelength of 15.5 nm, they have performed a series of x-ray laser interferometry experiments to characterize plasmas relevant to inertial confinement fusion. In this paper the authors describe experiments using a soft x-ray laser interferometer, operated in the Mach-Zehnder configuration, to study CH plasmas and exploding foil targets commonly used for x-ray laser targets. The two-dimensional density profiles obtained from the interferograms allow the authors to validate and benchmark their numerical models used to study the physics of laser-plasma interactions.
Book Synopsis Application of Soft X-ray Lasers for Probing High Density Plasmas by :
Download or read book Application of Soft X-ray Lasers for Probing High Density Plasmas written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The reliability and characteristics of collisionally pumped soft x-ray lasers make them ideal for a wide variety of plasma diagnostics. These systems now operate over a wavelength range extending from 35 to 400[Angstrom] and have output energies as high as 10 mJ in 150 ps pulses. The beam divergence of these lasers is less than 15 mrad and they have a typical linewidth of[Delta][lambda]/[lambda][approximately] 10[sup -4] making them the brightest xuv sources available. In this paper we will describe the use of x-ray lasers to probe high density plasmas using a variety of diagnostic techniques. Using an x-ray laser and a multilayer mirror imaging system we have studied hydrodynamic imprinting of laser speckle pattern on directly driven thin foils with 1-2[mu]m spatial resolution. Taking advantage of recently developed multilayer beamsplitters we have constructed and used a Mach-Zehnder interferometer operating at 155[Angstrom] to probe 1-3 mm size laser produced plasmas with peak electron densities of 4 x 10[sup 21] cm[sup -3]. A comparison of our results with computer simulations will be presented.
Book Synopsis Electron Density Measurement of a Colliding Plasma Using Soft X-ray Laser Interferometry by :
Download or read book Electron Density Measurement of a Colliding Plasma Using Soft X-ray Laser Interferometry written by and published by . This book was released on 1996 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The understanding of the collision and subsequent interaction of counter-streaming high-density plasmas is important for the design of indirectly-driven inertial confinement fusion (ICF) hohlraums. We have employed a soft x-ray Mach-Zehnder interferometer, using a Ne- like Y x-ray laser at 155 Å as the probe source, to study interpenetration and stagnation of two colliding plasmas. We observed a peaked density profile at the symmetry axis with a wide stagnation region with width of order 100 [mu]m. We compare the measured density profile with density profiles calculated by the radiation hydrodynamic code LASNEX and a multi-specie fluid code which allows for interpenetration. The measured density profile falls in between the calculated profiles using collisionless and fluid approximations. By using different target materials and irradiation configurations, we can vary the collisionality of the plasma. We hope to use the soft x-ray laser interferometry as a mechanism to validate and benchmark our numerical codes used for the design and analysis of high-energy- density physics experiments.
Book Synopsis A Final Report to the Laboratory Directed Research and Development Committee on Project 93-ERP-075 by :
Download or read book A Final Report to the Laboratory Directed Research and Development Committee on Project 93-ERP-075 written by and published by . This book was released on 1996 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the major accomplishments of this three-year Laboratory Directed Research and Development (LDRD) Exploratory Research Project (ERP) entitled ''X-ray Laser Propagation and Coherence: Diagnosing Fast-evolving, High-density Laser Plasmas Using X-ray Lasers, '' tracking code 93-ERP-075. The most significant accomplishment of this project is the demonstration of a new laser plasma diagnostic: a soft x-ray Mach-Zehnder interferometer using a neonlike yttrium x-ray laser at 155 Å as the probe source. Detailed comparisons of absolute two-dimensional electron density profiles obtained from soft x-ray laser interferograms and profiles obtained from radiation hydrodynamics codes, such as LASNEX, will allow us to validate and benchmark complex numerical models used to study the physics of laser-plasma interactions. Thus the development of soft x-ray interferometry technique provides a mechanism to probe the deficiencies of the numerical models and is an important tool for, the high-energy density physics and science-based stockpile stewardship programs. The authors have used the soft x-ray interferometer to study a number of high-density, fast evolving, laser-produced plasmas, such as the dynamics of exploding foils and colliding plasmas. They are pursuing the application of the soft x-ray interferometer to study ICF-relevant plasmas, such as capsules and hohlraums, on the Nova 10-beam facility. They have also studied the development of enhanced-coherence, shorter-pulse-duration, and high-brightness x-ray lasers. The utilization of improved x-ray laser sources can ultimately enable them to obtain three-dimensional holographic images of laser-produced plasmas.
Book Synopsis Application of Soft X-ray Laser Interferometry to Study Large-scale-length, High-density Plasmas by :
Download or read book Application of Soft X-ray Laser Interferometry to Study Large-scale-length, High-density Plasmas written by and published by . This book was released on 1996 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of XUV-interferometry (155 Å) Using a Soft X-ray Laser by :
Download or read book Development of XUV-interferometry (155 Å) Using a Soft X-ray Laser written by and published by . This book was released on 1995 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past several years the authors have developed a variety of techniques for probing plasmas with x-ray lasers. These have included direct high resolution plasma imaging to quantify laser produced plasma uniformities and moire deflectometry to measure electron density profiles in one-dimension. Although these techniques have been valuable, a need existed for direct two dimensional measurements of electron densities in large high density plasmas. For this reason the authors have worked on developing a xuv interferometer compatible with the harsh environment of laser produced plasmas. This paper describes the design and presents some results showing excellent fringe visibility using the neon-like yttrium x-ray laser operating at 155 Å. The coherence properties of this x-ray laser source were measured using interferometry and are also discussed.
Book Synopsis Application of X-rays Lasers as Imaging and Plasma Diagnostics by :
Download or read book Application of X-rays Lasers as Imaging and Plasma Diagnostics written by and published by . This book was released on 1994 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes utilization of multilayer mirrors and beam splitters to develop x-ray laser interferometry, radiography, and deflectometry to probe high-density laser plasmas.
Book Synopsis X-Ray Lasers 1996 by : Sune Svanberg
Download or read book X-Ray Lasers 1996 written by Sune Svanberg and published by CRC Press. This book was released on 1996-01-01 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-Ray Lasers 1996 provides not only an overview and progress report on this fast moving field, but also important reference material on which future work can be built. Topics covered include collisional x-ray lasers, table-top x-ray lasers, beam optics, x-ray optics, OFI and photo-pumped schemes, capillary schemes, international laser facilities, XUV nonlinear mixing, alternative soft x-ray sources, diagnostics, and applications. The volume is an essential addition to the libraries of researchers in the field.
Download or read book X-ray Laser Interferometry written by and published by . This book was released on 1995 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collisionally pumped soft x-ray lasers now operate over a wavelength range extending from 4--40 nm. With the recent advances in the development of multilayer mirrors and beamsplitters in the soft x-ray regime, we can utilize the unique properties of x-ray lasers to study large, rapidly evolving laser-driven plasmas with high electron densities. By employing a shorter wavelength x-ray laser, as compared to using conventional optical laser as the probe source, we can access a much higher density regime while reducing refractive effects which limit the spatial resolution and data interpretation. Using a neon-like yttrium x-ray laser which operates at a wavelength of 15.5 mn, we have performed a series of soft x-ray laser interferometry experiments, operated in the skewed Mach-Zehnder configuration, to characterize plasmas relevant to both weapons and inertial confinement fusion. The two-dimensional density profiles obtained from the interferograms allow us to validate and benchmark our numerical models used to study the physics in the high-energy density regime, relevant to both weapons and inertial confinement fusion.
Book Synopsis A Picosecond 14.7 Nm X-Ray Laser for Probing Matter Undergoing Rapid Changes by :
Download or read book A Picosecond 14.7 Nm X-Ray Laser for Probing Matter Undergoing Rapid Changes written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With laser-driven tabletop x-ray lasers now operating in the efficient saturation regime, the source characteristics of high photon flux, high monochromaticity, picosecond pulse duration, and coherence are well-matched to many applications involving the probing of matter undergoing rapid changes. We give an overview of recent experiments at the Lawrence Livermore National Laboratory (LLNL) Compact Multipulse Terawatt (COMET) laser using the picosecond 14.7 nm x-ray laser as a compact, ultrafast probe for surface analysis and for interferometry of laser-produced plasmas. The plasma density measurements for known laser conditions allow us to reliably and precisely benchmark hydrodynamics codes. In the former case, the x-ray laser ejects photo-electrons, from the valence band or shallow core-levels of the material, and are measured in a time-of-flight analyzer. Therefore, the electronic structure can be studied directly to determine the physical properties of materials undergoing rapid phase changes.
Book Synopsis Skeppsmätningskommitterades betänkande by :
Download or read book Skeppsmätningskommitterades betänkande written by and published by . This book was released on 1911 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X-Ray Lasers 2006 written by P.V. Nickles and published by Springer Science & Business Media. This book was released on 2008-01-18 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: The search for table-top and repetitive pump schemes during the last decade has been the driving force behind the spectacular advances demonstrated during the 10th International Conference on X-Ray Lasers, organized in 2006 in Berlin. The proceedings of this series of conferences constitute a comprehensive source of reference of the acknowledged state-of the-art in this specific area of laser and plasma physics.
Book Synopsis Picosecond 14.7 Nm Interferometry of High Intensity Laser-produced Plasmas by :
Download or read book Picosecond 14.7 Nm Interferometry of High Intensity Laser-produced Plasmas written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have developed a compact, 14.7 nm, sub-5 ps x-ray laser source at LLNL together with a Mach-Zehnder type Diffraction Grating Interferometer built at Colorado State University for probing dense, high intensity laser-produced plasmas. The short wavelength and pulse length of the probe reduces refraction and absorption effects within the plasma and minimizes plasma motion blurring. This unique diagnostic capability gives precise 2-D density profile snapshots and is generating new data for rapidly evolving laser-heated plasmas. A review of the results from dense, mm-scale line focus plasma experiments will be described with detailed comparisons to hydrodynamic simulations.
Book Synopsis Strong Field Laser Physics by : Thomas Brabec
Download or read book Strong Field Laser Physics written by Thomas Brabec and published by Springer. This book was released on 2008-08-17 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the rapid progress in laser technology a wealth of novel fundamental and applied applications of lasers in atomic and plasma physics have become possible. This book focuses on the interaction of high intensity lasers with matter. It reviews the state of the art of high power laser sources, intensity laser-atom and laser-plasma interactions, laser matter interaction at relativistic intensities, and QED with intense lasers.
Book Synopsis New Regime of Thomson Scattering by :
Download or read book New Regime of Thomson Scattering written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper the authors demonstrate through calculations and theoretical analysis the first application of a x-ray laser for probing hot, high-density plasmas (n{sub e} ≥ 1023 cm−3) using a Ni-like transient collisional excitation x-ray laser as a probe. Theoretical predictions are used to diagnose the electron temperature in short pulse (500 fs) laser produced plasmas. The threshold power of the x-ray probe is estimated by comparing theoretical scattering levels with plasma thermal emission. The necessary spectral resolution of the instrument sufficient for resolving electron temperature is given.
Book Synopsis Dynamics of Converging Laser-Created Plasmas in Semi-Cylindrical Cavities Studied Using Soft X-Ray Laser Interferometry by :
Download or read book Dynamics of Converging Laser-Created Plasmas in Semi-Cylindrical Cavities Studied Using Soft X-Ray Laser Interferometry written by and published by . This book was released on 2007 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of dense aluminum and carbon plasmas produced by laser irradiation of 500 [mu]m diameter semi-cylindrical targets was studied using soft x-ray laser interferometry. Plasmas created heating the cavity walls with 120 picosecond duration optical laser pulses of ≈ 1 x 1012 W cm−2 peak intensity were observed to expand and converge on axis to form a localized high density plasma region. Electron density maps were measured using a 46.9 nm wavelength tabletop capillary discharge soft x-ray laser probe in combination with an amplitude division interferometer based on diffraction gratings. The measurements show that the plasma density on axis exceeds 1 x 102° cm−3. The electron density profiles are compared with simulations conducted using the hydrodynamic code HYDRA, which show that the abrupt density increase near the axis is dominantly caused by the convergence of plasma generated at the bottom of the groove during laser irradiation.
Download or read book X-Ray Lasers 2008 written by Ciaran Lewis and published by Springer Science & Business Media. This book was released on 2009-09-29 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 11th International Conference on X-Ray Lasers had contributions in the following topical areas: Transient Collisional X-Ray Lasers, Table-Top High Repetition Rate X-Ray Lasers, Optical-Field Ionised (OFI) X-Ray Lasers, Theory and Simulation of X-Ray Lasers, High Order Harmonic Generation, XUV Optics and X-Ray Laser Applications, Capillary Discharge X-Ray Lasers, Alternative Sources of coherent XUV Radiation. The proceedings of this conference constitute a comprehensive source of reference for scientists involved in researching the development and application of coherent X-Ray sources.
