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Author : Stephen E. Bodner
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.3/5 (91 download)
Download or read book Nike, KrF Laser Facility written by Stephen E. Bodner and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen E. Bodner
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (3 download)
Download or read book Nike, KrF Laser Facility written by Stephen E. Bodner and published by . This book was released on 1995 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 211 pages
Book Rating : 4.:/5 (227 download)
Download or read book NIKE KrF Laser Facility written by and published by . This book was released on 1994 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past four years, the Naval Research Laboratory has been developing a new krypton fluoride laser called Nike as our next step in the evaluation of direct-drive laser fusion. The fundamental near-term justification for KrF is its potential to produce a very smooth laser profile using the optical smoothing technique called ISI (induced spatial incoherence). For longer-term power plant applications, KrF also appears to be the most attractive laser option. In general, any laser nonuniformity tends to degrade the performance of a high gain pellet design, because the laser nonuniformity seeds the Rayleigh-Taylor hydrodynamic instability. This instability can be ameliorated by preheating the fuel, but the preheat then reduces the thermonuclear yield. To obtain the highest possible yield, one generally wants the least possible laser nonuniformity. The first phase of Nike is now operating, and its performance has exceeded our expectations. (MM).
Author :
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (318 download)
Download or read book Measurements of Low-Level Prepulse on Nike KrF Laser (Preprint). written by and published by . This book was released on 2005 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The krypton fluoride (KrF) laser is a leading candidate driver for inertial fusion energy. Some of the current fusion target designs call for targets with thin metallic coatings. These targets could be particularly susceptible to preheat by a low-level laser prepulse. Knowledge of the prepulse can be important in understanding and modeling the behavior of such targets. This paper presents measurements of low-level prepulse on target with the Nike KrF laser. Sources of prepulse are discussed and measurements are performed under several specific laser conditions in order to evaluate the relative contribution of these sources to the overall prepulse. Prepulse is found to be approx. 2 x 10( -7) from peak intensity for approximately 120 ns prior to the main laser pulse. Prepulse energy density on target is approx. 2 J/cm(2). The first laser amplifier in the time- and angle-multiplexed section of the laser is found to be the dominant source of prepulse.
Author :
Publisher :
ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.3/5 (121 download)
Download or read book NRL Major Facilities written by and published by . This book was released on 1995 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development KrF Lasers for Inertial Confinement Fusion written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High peak power rare gas halide lasers for applications in Inertial Confinement Fusion are being developed at laboratories across the world. The United States Department of Energy sponsors a program conducted at the Los Alamos National Laboratory and the Naval Research Laboratory. The Los Alamos laser development program is composed of three major elements; the Aurora Laser Facility is a 1 terawatt KrF laser designed as an integrated performance demonstration of a target qualified excimer laser system; an advanced design effort evaluates concepts that offer the improved performance and lower cost that will be essential for the construction of future lasers in the 0.5 to 10 MJ class; and a laser technology program that addresses both performance and cost issues that will be important in advanced laser system designs. 4 figs.
Author :
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (727 download)
Download or read book KrF Laser Path to High Gain ICF (inertial Confinement Fusion) Laboratory Microfusion Facility written by and published by . This book was released on 1990 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The krypton-fluoride laser has many desirable features for inertial confinement fusion. Because it is a gas laser capable of operation with high efficiency, it is the only known laser candidate capable of meeting the driver requirements for inertial fusion energy (IFE) production. Los Alamos National Laboratory has defined a program plan to develop KrF lasers for IFE production. This plan develops the KrF laser and demonstrates the target performance in single-pulse facilities. A 100-kJ Laser Target Test Facility (LTTF) is proposed as the next step, to be followed by a 3 to 10-MJ Laboratory Microfusion Facility (LMF). The LTTF will resolve many target physics issues and accurately define the driver energy required for the LMF. It is also proposed that the technology development for IFE, such as the high-efficiency, high-reliability, repetitively pulsed driver, the reactor, mass production of targets, and the mechanism of injecting targets be developed in parallel with the single-pulse facilities. 11 refs., 4 figs.
Author :
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (318 download)
Download or read book Laser Plasma Instability Experiments with KrF Lasers written by and published by . This book was released on 2007 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deleterious effects of laser-plasma instability (LPI) may limit the maximum laser irradiation that can be used for inertial confinement fusion. The short wavelength (248 nm), large bandwidth, and very uniform illumination available with krypton-fluoride (KrF) lasers should increase the maximum usable intensity by suppressing LPI. The concomitant increase in ablation pressure would allow implosion of low aspect ratio pellets to ignition with substantial gain (>20) at much reduced laser energy. The proposed KrF laser based Fusion Test Facility (FTF) would exploit this strategy to achieve significant fusion power (150 MW) with a rep-rate system that has a per pulse laser energy well below 1 megajoule. Measurements of LPI using the Nike KrF laser are presented at and above intensities needed for the FTF (I~2x1015 W/cm2). The results to date indicate that LPI is indeed suppressed. With overlapped beam intensity above the planar, single beam intensity threshold for the two-plasmon decay instability, no evidence of instability was observed via measurements of 3/2 omega(o) and 1/2 omega(o) harmonic emissions.
Author :
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (318 download)
Download or read book Observation of Rayleigh-Taylor Growth to Short Wavelengths on Nike written by and published by . This book was released on 1999 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The uniform and smooth focal profile of the Nike KrF laser [S. Obenschain, et. al., Phys. Plasmas 3, 1996 (2098)] was used to ablatively accelerate 40 micrometer thick polystyrene planar targets with pulse shaping to minimize shock heating of the compressed material. The foils had imposed small amplitude sinusoidal wave perturbations of 60, 30, 20, and 12.5 micrometer wavelength. The shortest wavelength is near the ablative stabilization cutoff for Rayleigh-Taylor growth. Modification of saturated wave structure due to random laser imprint was observed. Excellent agreement was found between the two dimensional simulations and experimental data for most cases where laser imprint was not dominant.
Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (727 download)
Download or read book Mercury written by and published by . This book was released on 1993 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mercury KrF laser facility at Los Alamos is being built with the benefit of lessons learned from the Aurora system. An increased understanding of KrF laser engineering, and the designed implementation of system flexibility, will permit Mercury to serve as a tested for a variety of advanced KrF technology concepts.
Author : Ye Zhou
Publisher : Cambridge University Press
ISBN 13 : 1108489648
Total Pages : 611 pages
Book Rating : 4.1/5 (84 download)
Download or read book Hydrodynamic Instabilities and Turbulence written by Ye Zhou and published by Cambridge University Press. This book was released on 2024-05-31 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive reference guide to turbulent mixing driven by Rayleigh-Taylor, Richtmyer-Meshkov and Kelvin-Helmholtz instabilities.
Author : United States. Congress. House. Committee on Science. Subcommittee on Basic Research
Publisher :
ISBN 13 :
Total Pages : 1116 pages
Book Rating : 4.0/5 ( download)
Download or read book GAO Report on the Department of Energy National Laboratory Management written by United States. Congress. House. Committee on Science. Subcommittee on Basic Research and published by . This book was released on 2000 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (318 download)
Download or read book Development of Electron Beam Pumped KrF Lasers for Fusion Energy written by and published by . This book was released on 2008 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct drive with krypton fluoride (KrF) lasers is an attractive approach to inertial fusion energy (IFE): KrF lasers have outstanding beam spatial uniformity, which reduces the seed for hydrodynamic instabilities; they have short wavelength (248 nm) that increases the rocket efficiency and raises the threshold for deleterious laser-plasma instabilities; they have the capability for zooming, i.e. decreasing the spot size to follow an imploding pellet and thereby increase efficiency; and they have a modular architecture, which reduces development costs. Numerical 1-D simulations have shown that a target driven by a KrF laser can have a gain above 125 [1,2], which is ample for a fusion system. Simulations of the pellet burn in 2-D and 3-D are underway. In addition to these laser-target advantages, the Sombrero Power Plant study showed a KrF based system could lead to an economically attractive power plant [3]. In view of these advances, several world-wide programs are underway to develop KrF lasers for fusion energy. These include programs in Japan [4, 5], China [6], Russia [7], and The United Kingdom [8]. There was also a large program in the United States [9]. The paper here concentrates on current research in the US with two lasers at the Naval Research Laboratory: The Electra laser [10] is a 400-700 J repetitively pulsed system that is being used to develop the technologies that meet the fusion requirements for rep-rate, durability, efficiency and cost. The Nike laser [11] is a 3-5 kJ single shot device that is used to study KrF issues with full-scale electron beam diodes.
Author : R. H. Lehmberg
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (227 download)
Download or read book Baseline Design of a 5-7 KJ KrF Laser Facility for Direct Illumination ICF Experiments written by R. H. Lehmberg and published by . This book was released on 1985 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the baseline design for a 48 channel angularly-multiplexed KrF laser system, using amplifier modules similar to those in the AURORA laser at Los Alamos National Laboratory. With output energies of 5-7 kJ, pulsewidths approx. = 5 ns, and broadband (> 20 1/cm) capabilities, the proposed system is intended primarily for laser-plasma experiments related to direct-drive inertial confinement fusion. The design incorporates the NRL induced spatial incoherence (ISI) technique into each beam in order to achieve the smoothly-varying and controllable irradiation profiles essential to the direct-drive approach. The option of using stimulated Raman scattering to improve the beam quality prior to the ISI echelons is also discussed. (Author).
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ISBN 13 :
Total Pages : 944 pages
Book Rating : 4.:/5 (31 download)
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995-11 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 942 pages
Book Rating : 4.3/5 (243 download)
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1995 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.:/5 (31 download)
Download or read book NRL Review written by and published by . This book was released on 1994 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
