Download or read book Physics of High Density Z Pinch Plasmas written by Michael A. Liberman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: A "z pinch" is a deceptively simple plasma configuration in which a longitudinal current produces a magnetic field that confines the plasma. Z-pinch research is currently one of the fastest growing areas of plasma physics, with revived interest in z-pinch controlled fusion reactors along with investigations of new z-pinch applications, such as very high power x-ray sources, high-energy neutrons sources, and ultra-high magnetic fields generators. This book provides a comprehensive review of the physics of dense z pinches and includes many recent experimental results.

Download or read book Physics and Application of High Density Z pinches written by Kakuyūgō Kagaku Kenkyūjo and published by . This book was released on 1993 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Physics of the High Density Z pinch written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The fiber-initiated High-Density Z-Pinch (HDZP) is a novel concept in which fusion plasma could be produced by applying 2 MV along a thin filament of frozen deuterium, 20-30 .mu.m in diameter, 5-10 cm long. The megamp-range currents that result would ohmically heat the fiber to fusion temperatures in 100 ns while maintaining nearly constant radius. The plasma pressure would be held stably by the self-magnetic field for many radial sound transit times during the current-rise phase while, in the case of D-T, a significant fraction of the fiber undergoes thermonuclear fusion. This paper presents results of Los Alamos HDZP studies. Existing and new experiments are described. A succession of theoretical studies, including 1D self-similar and numerical studies of the hot plasma phase, 1D and 2D numerical studies of the cold startup phase, and 3D numerical studies of stability in the hot regime, are then presented. 9 refs., 4 figs.

Download or read book Z pinches as Intense X ray Sources for High Energy Density Physics Application written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fast z-pinch implosions can convert more than 10% of the stored electrical energy in a pulsed-power accelerator into x rays. These x rays are produced when an imploding cylindrical plasma, driven by the magnetic field pressure associated with very large axial currents, stagnates upon the cylindrical axis of symmetry. On the Saturn pulsed-power accelerator at Sandia National Laboratories, for example, currents of 6 to 8 MA with a risetime of less than 50 ns are driven through cylindrically-symmetric loads, producing implosions velocities as high as 100 cm/[mu]s and x-ray energies as high as 500 kJ. The keV component of the resulting x-ray spectrum has been used for many years 8 a radiation source for material response studies. Alternatively, the x-ray output can be thermalized into a near-Planckian x-ray source by containing it within a large cylindrical radiation case. These large volume, long-lived radiation sources have recently been used for ICF-relevant ablator physics experiments as well as astrophysical opacity and radiation-material interaction experiments. Hydromagnetic Rayleigh-Taylor instabilities and cylindrical load symmetry are critical, limiting factors in determining the assembled plasma densities and temperatures, and thus in the x-ray pulse widths that can be produced on these accelerators. In recent experiments on the Saturn accelerator, these implosion nonuniformities have been minimized by using uniform-fill gas puff loads or by using wire arrays with as many a 192 wires. These techniques produced significant improvements in the pinched plasma quality, Zn reproducibility, and x-ray output power. X-ray pulse widths of less than 5 ns and peak powers of 75[+-]10 TW have been achieved with arrays of 120 tungsten wires. These powers represent greater than a factor of three in power amplification over the electrical power of the Saturn n accelerator, and are a record for x-ray powers in the laboratory.

Download or read book Dense Z Pinches written by Jack Davis and published by American Institute of Physics. This book was released on 2002-12-13 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: This conference was a topical meeting in the area of high energy density plasma physics as it relates to magnetically imploded/confined plasmas: Z-pinches. Scientists interested in plasmas for fusion and other applications at temperatures around a million degrees centigrade with strong magnetic fields and intense radiation fluxes will be interested in this conference. The physics of the plasmas discussed in this conference include magneto-hydrodynamics and instabilities, fusion mechanisms, radiation transport, mega-ampere pulsed power, atomic physics, spectroscopy and x-ray imaging. This proceeding provides a snapshot of the field internationally.

Download or read book Dense Z Pinches written by Jeremy Chittenden and published by AIP Conference Proceedings / P. This book was released on 2006-01-06 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume summarizes the state-of-the-art in Z-pinch research pertaining to applications in inertial confinement fusion, x-ray radiation sources and high energy density plasma physics. Topics include: wire array Z-pinches, single wires and fibers, X-pinches, gas-puffs, plasma focus, capillary discharges and soft X-ray lasers, pulsed power drivers, diagnostic techniques and spectroscopy, as well as theoretical concepts.

Download or read book Study of the Internal Structure Instabilities and Magnetic Fields in the Dense Z pinch written by and published by . This book was released on 2016 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Z-pinches are sources of hot dense plasma which generates powerful x-ray bursts and can been applied to various areas of high-energy-density physics (HEDP). The 26-MA Z machine is at the forefront of many of these applications but important aspects of HEDP have been studied on generators at the 1 MA current level. Recent development of laser diagnostics and upgrade of the Leopard laser at Nevada Terawatt Facility (NTF) give new opportunities for the dense Z-pinch study. The goal of this project is the investigation of the internal structure of the stagnated Z pinch including sub-mm and micron-scale instabilities, plasma dynamics, magnetic fields, and hot spots formation and initiation. New plasma diagnostics will be developed for this project. A 3D structure and instabilities of the pinch will be compared with 3D MHD and spectroscopic modeling and theoretical analysis. The structure and dynamics of stagnated Z pinches has been studied with x-ray self-radiation diagnostics which derive a temperature map of the pinch with a spatial resolution of 70-150 æm. The regular laser diagnostics at 532 nm does not penetrate in the dense pinch due to strong absorption and refraction in trailing plasma. Recent experiments at NTF showed that shadowgraphy at the UV wavelength of 266 nm unfolds a fine structure of the stagnated Z-pinch with unprecedented detail. We propose to develop laser UV diagnostics for Z pinches with a spatial resolution 5 [mu]m to study the small-scale plasma structures, implement two-frame shadowgraphy/interferometry, and develop methods for investigation of strong magnetic fields. New diagnostics will help to understand better basic physical processes in Z pinches. A 3D internal structure of the pinch and characteristic instabilities will be studied in wire arrays with different configurations and compared with 3D MHD simulations and analytical models. Mechanisms of "enhanced heating" of Z-pinch plasma will be studied. Fast dynamics of stagnated plasma will be studied to estimate its contribution to the Doppler broadening of x-ray lines. Development of "necks" and "hot spots" will be studied with high-resolution UV diagnostics, an x-ray streak camera, and x-ray spectroscopy. Laser initiation of hot spots in Z pinches will be tested. A Faraday rotation diagnostic at 266 nm will be applied to 1-10 MG magnetic fields. For magnetic fields B20 MG, suggested in micropinches, Cotton-Mouton and cutoff diagnostics will be applied. A picosecond optical Kerr shutter will be tested to increase a sensitivity of UV methods for application at multi-MA Z pinches. The proposal is based on the experimental capability of NTF. The Zebra generator produces 1-1.7 MA Z-pinches with electron plasma density of 1020-1021cm-3, electron temperature of 0.5-1 keV, and magnetic fields>10 MG. The Leopard laser was upgraded to energy of 90-J at 0.8 ns. This regime will be used for laser initiation of hot spots. A further upgrade to energy of 250-J is suggested for laser-Z-pinch interaction. A picosecond regime will be used for optical gating. A 10-TW Tomcat laser at NTF is available for the high energy UV laser probing of the Z-pinch. Two graduate students will develop new optical and x-ray diagnostics, carry out experiments, and process experimental data. Other students will be involved in the design and fabrication of loads, supporting regular optical and x-ray diagnostics, and data processing. The new plasma diagnostics may be applied to HEDP experiments at NTF and other multi-MA generators. The feasibility of the research plan is based on the experience of the scientific team in Z-pinch plasma physics, laser physics, development of new plasma diagnostics, and the experimental capability of NTF. The experimental group of Dr. V.V. Ivanov (UNR) collaborates with a group for Z pinch MHD modeling of Dr. J.P. Chittenden (Imperial College, London), and theoretical group of Dr. D.D. Ryutov (LLNL). The suggested research ideas are supported by preli ...

Download or read book Dense Z pinches 5th International Conference on Dense Z Pinches Albuquerque New Mexico 23 28 June 2002 written by International Conference on Dense Z-Pinches and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dense Z Pinches written by Bruce R. Kusse and published by American Institute of Physics. This book was released on 2009-02-24 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scope of this 7th International Conference has continued to increase beyond the 1984 topic of Dense Z-Pinches to include the area of pulse power driven High Energy Density Plasma Physics. The subjects presented included; new wire array z-pinch geometries, gas puff experiments, plasma focus experiments, capillary and single channel discharges, astrophysics, advances in pulsed power drivers and new techniques for diagnosing high energy density plasmas.

Download or read book Cylindrical Liner Z pinches as Drivers for Converging Strong Shock Experiments written by Guy C. Burdiak and published by Springer. This book was released on 2014-06-06 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis represents the development of an entirely new experimental platform for generating and studying converging radiative shock waves. It was discovered that the application of large magnetic pressures to gas-filled cylindrical metallic tubes could sequentially produce three shocks within the gas. A comprehensive set of instrumentation was devised to explore this system in detail and an exceptionally thorough experimental and theoretical study was carried out in order to understand the source of the shock waves and their dynamics. The research is directed towards some of the most interesting topics in high energy density physics (HEDP) today, namely the interaction of HED material with radiation and magnetic fields, with broad applications to inertial confinement fusion (ICF) and laboratory plasma astrophysics. The work has already generated significant international interest in these two distinct research areas and the results could have significant importance for magnetic ICF concepts being explored at Sandia National Laboratories in the US and for our understanding of the very strong shock waves that are ubiquitous in astrophysics.

Download or read book Carbon Fibre Z Pinch written by Daniel Klír and published by LAP Lambert Academic Publishing. This book was released on 2010-04 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Z-pinch belongs to one of the most fascinating plasma objects due to its simplicity, natural occurrence and variety of applications. This book focuses on a Z-pinch formed from a carbon fibre with a few micrometers in diameter. On the one hand, a large number of papers are devoted to studies of Z-pinches initiated from a high atomic number metal wire. On the other hand, no systematic effort has been made to study a Z-pinch initiated from a carbon fibre in vacuum using a simple capacitor bank. This work presents the description of carbon fibre Z-pinch dynamics and it shows that unique properties of carbon could provide valuable data not only for Z-pinch physics (breakdown physics, implosion of a low density plasma, carbon fiber ablation, dynamics of bright spots etc.) but also for life science and material science in which carbon is often used. Therefore, this resource might be helpful to those who are interested in physics and diagnostics of Z-pinch plasma and to those who want to know what happens when an electric current of 100 kiloamperes starts to flow through a few micrometer thick carbon fibre.

Download or read book Frontiers in High Energy Density Physics written by National Research Council and published by National Academies Press. This book was released on 2003-05-11 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent scientific and technical advances have made it possible to create matter in the laboratory under conditions relevant to astrophysical systems such as supernovae and black holes. These advances will also benefit inertial confinement fusion research and the nation's nuclear weapon's program. The report describes the major research facilities on which such high energy density conditions can be achieved and lists a number of key scientific questions about high energy density physics that can be addressed by this research. Several recommendations are presented that would facilitate the development of a comprehensive strategy for realizing these research opportunities.

Download or read book Dense Z pinches written by Nino R. Pereira and published by . This book was released on 1989 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dense Z Pinches written by Jack Davis and published by American Institute of Physics. This book was released on 2002-12-13 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a parallel CD-ROM with ISBN 0-7354-0109-8, which is a combined CD with all papers from CP 651 and CP 650.

Download or read book Dense Z pinches written by and published by . This book was released on 1994 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dense Z pinches written by Malcolm Haines and published by . This book was released on 1994 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Proceedings of a conference held in London, in April 1993. Papers are in nine sections on stability; theory and simulations; x-ray sources and x-ray lasers; plasma focus; implosions; fiber pinches; spectroscopy; x-pinches, vacuum sparks, and other pinches; and a wider view. No index. Annotation c. by Book News, Inc., Portland, Or.

Download or read book High Energy Density Physics written by R. Paul Drake and published by Springer Science & Business Media. This book was released on 2006-08-31 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has two goals. One goal is to provide a means for those new to high-energy-density physics to gain a broad foundation from one text. The second goal is to provide a useful working reference for those in the ?eld. This book has at least four possible applications in an academic c- text. It can be used for training in high-energy-density physics, in support of the growing number of university and laboratory research groups working in this area. It also can be used by schools with an emphasis on ultrafast lasers, to provide some introduction to issues present in all laser–target - perimentswithhigh-powerlasers,andwiththoroughcoverageofthematerial in Chap. 11 on relativistic systems. In addition, it could be used by physics, applied physics, or engineering departments to provide in a single course an introduction to the basics of ?uid mechanics and radiative transfer, with d- matic applications. Finally, it could be used by astrophysics departments for a similar purpose, with the parallel bene?t of training the students in the similarities and di?erences between laboratory and astrophysical systems. The notation in this text is deliberately sparse and when possible a given symbol has only one meaning. A de?nition of the symbols used is given in Appendix A. In various cases, additional subscripts are added to distinguish among cases of the same quantity, as for example in the use of ? and ? 1 2 to distinguish the mass density in two di?erent regions.