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Author :
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ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (727 download)
Download or read book X-ray Laser Interferometry of Confined Laser-Produced Plasmas written by and published by . This book was released on 2010 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (683 download)
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.
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ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (873 download)
Download or read book Picosecond Resolution Soft X-ray Laser Plasma Interferometry written by and published by . This book was released on 2003 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: We describe a soft x-ray laser interferometry technique that allows two-dimensional diagnosis of plasma electron density with picosecond time resolution. It consists of the combination of a robust high throughput amplitude division interferometer and a 14.7 nm transient inversion soft x-ray laser that produces ≈ 5 ps pulses. Due to its picosecond resolution and short wavelength scalability, this technique has potential for extending the high inherent precision of soft x-ray laser interferometry to the study of very dense plasmas of significant fundamental and practical interest, such as those investigated for inertial confined fusion. Results of its use in the diagnostics of dense large scale laser-created plasmas are presented.
Author :
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ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (683 download)
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.
Author : Randolf Butzbach
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (248 download)
Download or read book X-ray Optical Diagnostic of Laser Produced Plasmas for Nuclear Fusion and X-ray Lasers written by Randolf Butzbach and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of toroidally bent crystals for the diagnostic of laser-produced plasmas for Inertial Confinement Fusion (ICF) and Amplified Spontaneous Emission (ASE, "X-Ray Laser") close to the water-window is described. The optical properties of the crystals as X-ray microscop and -spectrometer is presented by ray-tracing calculations. The observation of Rayleigh-Taylor-Instablities is shown as well as investigations in Ta plasmas for Ni-like X-Ray lasers.
Author : R. F. Smith
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (316 download)
Download or read book Interferometric Studies of Laser-created Plasmas Using Compact Soft X-ray Lasers written by R. F. Smith and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: We summarize results of several successful dense plasma diagnostics experiments realized by combining two different kinds of table-top soft x-ray lasers with an amplitude division interferometer based on diffraction grating beam splitters. In the first set of experiments this robust high throughput diffraction grating interferometer (DGI) was used with a 46.9 nm portable capillary discharge laser to study the dynamics of line focus and point focus laser-created plasmas. The measured electron density profiles, which differ significantly from those expected from a classical expansion, unveil important two-dimensional effects of the dynamics of these plasmas. A second DGI customized to operate in combination with a 14.7 nm Ni-like Pd transient gain laser was used to perform interferometry of line focus laser-created plasmas with picosecond time resolution. These measurements provide valuable new benchmarks for complex hydrodynamic codes and help bring new understanding of the dynamics of dense plasmas. The instrumentation and methodology we describe is scalable to significantly shorter wavelengths, and constitutes a promising scheme for extending interferometry to the study of very dense plasmas such as those investigated for inertial confinement fusion.
Author : Alan L. Hoffman
Publisher :
ISBN 13 :
Total Pages : 159 pages
Book Rating : 4.:/5 (227 download)
Download or read book Laser Heating of Magnetically Confined Plasmas for X-Ray Production written by Alan L. Hoffman and published by . This book was released on 1973 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Axial heating of a high density, initially low beta, theta-pinch plasma by 10.6 micrometer radiation has been demonstrated. A self laser beam trapping, electron density minimum on-axis has been created and maintained by magnetic field shaping and laser heating. A 10-cm long by 6-mm diameter 5 x 10 to the 17th power/cc electron density plasma column has been heated from an initial temperature of 10 eV to 100 eV by 50 J of laser energy in 100 nsec. The resulting plasma expansion and on-axis density reduction has been measured by holographic interferometry. (Modified author abstract).
Author : R. F. Smith
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (316 download)
Download or read book A High Efficiency Grazing Incidence Pumped X-ray Laser written by R. F. Smith and published by . This book was released on 2006 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of the project is to demonstrate a proof-of-principle, new type of high efficiency, short wavelength x-ray laser source that will operate at unprecedented high repetition rates (10Hz) that could be scaled to 1kHz or higher. The development of a high average power, tabletop x-ray laser would serve to complement the wavelength range of 3rd and future 4th generation light sources, e.g. the LCLS, being developed by DOE-Basic Energy Sciences. The latter are large, expensive, central, synchrotron-based facilities while the tabletop x-ray laser is compact, high-power laser-driven, and relatively inexpensive. The demonstration of such a unique, ultra-fast source would allow us to attract funding from DOE-BES, NSF and other agencies to pursue probing of diverse materials undergoing ultrafast changes. Secondly, this capability would have a profound impact on the semiconductor industry since a coherent x-ray laser source would be ideal for ''at wavelength'' {approx}13 nm metrology and microscopy of optics and masks used in EUV lithography. The project has major technical challenges. We will perform grazing-incidence pumped laser-plasma experiments in flat or groove targets which are required to improve the pumping efficiency by ten times. Plasma density characterization using our existing unique picosecond x-ray laser interferometry of laser-irradiated targets is necessary. Simulations of optical laser propagation as well as x-ray laser production and propagation through freely expanding and confined plasma geometries are essential. The research would be conducted using the Physics Directorate Callisto and COMET high power lasers. At the end of the project, we expect to have a high-efficiency x-ray laser scheme operating below 20 nm at 10Hz with a pulse duration of {approx}2 ps. This will represent the state-of-the-art in x-ray lasers and would be a major step forward from our present picosecond laser-driven x-ray lasers. There is an added bonus of creating the shortest wavelength laboratory x-ray laser, below 4.5 nm and operating in the water window, by using the high-energy capability of the Titan laser.
Author :
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ISBN 13 :
Total Pages : 680 pages
Book Rating : 4.E/5 ( download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : I. C. E. Turcu
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 348 pages
Book Rating : 4.3/5 (91 download)
Download or read book X-Rays From Laser Plasmas written by I. C. E. Turcu and published by John Wiley & Sons. This book was released on 1999 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soft X-rays have great potential for use in a wide variety of applications, including the semiconductor industry and the life sciences. X-Rays from Laser Plasmas: Generation and Applications focuses exclusively and in detail on the science and technology of soft X-rays produced with non-synchrotron sources. Using a minimum of mathematical formulae, it discusses how such X-rays can be efficiently and economically generated from plasmas produced by lasers, and how they interact with matter. Authored by Dr Edmond Turcu, one of the pioneers in this field, X-Rays from Laser Plasmas: Generation and Applications will be of great interest to a wide variety of readers, including all those working in X-ray lithography, microscopy, and radiobiology.
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ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (871 download)
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.
Author : Bruce Kai Fong Young
Publisher :
ISBN 13 :
Total Pages : 724 pages
Book Rating : 4.:/5 (33 download)
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:
Author : Radziemski
Publisher : CRC Press
ISBN 13 : 9780824780784
Total Pages : 476 pages
Book Rating : 4.7/5 (87 download)
Download or read book Lasers-Induced Plasmas and Applications written by Radziemski and published by CRC Press. This book was released on 1989-06-28 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing an interdisciplinary approach to plasma engineering and techniques, the book contains a timely examination of the physics of laser-induced breakdown.
Author : Alan L. Hoffman
Publisher :
ISBN 13 :
Total Pages : 125 pages
Book Rating : 4.:/5 (227 download)
Download or read book Laser Heating of Magnetically Confined Plasmas for X-Ray Production. Phase II. written by Alan L. Hoffman and published by . This book was released on 1974 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed laser absorption-atomic physics program has been developed to describe the 'bleaching wave' propagation of a laser beam into a magnetically confined plasma column, and the subsequent ionization of, and radiation from, high-Z constituents. A CO2 laser producing 100 J in 50 nsec has been used to heat neon plasmas in 100 kG magnetic fields to several hundred eV temperatures at 10 to the 18th power/cc electron densities. A dense, 10-cm long, 1-cm diameter, weakly ionized plasma column was formed by theta pinch action. The central few mm were heated and 8 times ionized by the laser driven bleaching wave. For laser pulse energies above 70 J, intense K-shell radiation was measured emanating from the far end of the plasma column.
Author : Jorge Filevich
Publisher :
ISBN 13 :
Total Pages : 350 pages
Book Rating : 4.:/5 (183 download)
Download or read book Soft X-ray Laser Interferometry of Dense Plasmas written by Jorge Filevich and published by . This book was released on 2007 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (893 download)
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.
Author : B. Lax
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (227 download)
Download or read book Laser-Produced Plasmas and Radiation Sources written by B. Lax and published by . This book was released on 1975 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental and theoretical study of CO2 Laser-induced gas breakdown, laser heating of magnetically confined plasma, and emission of soft X-rays from laser-heated plasma has been performed. Demonstrations were made of the roles of electron diffusion, pulse time, and inelastic losses in laser-induced gas breakdown. The phenomenon of CO2 laser beam self-trapping and associated plasma dynamics were studied. High-Z plasma impurities and magnetic field were shown to increase the heating and soft X-ray emission from CO2 laser-heated plasmas.
