Axial Evolution Of A Sheared Flow Stabilized Z Pinch

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Axial Evolution of a Sheared-flow-stabilized Z Pinch

Author : Elliot L. Claveau
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (124 download)

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Book Synopsis Axial Evolution of a Sheared-flow-stabilized Z Pinch by : Elliot L. Claveau

Download or read book Axial Evolution of a Sheared-flow-stabilized Z Pinch written by Elliot L. Claveau and published by . This book was released on 2020 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fusion Z-pinch Experiment (FuZE) is a sheared-flow-stabilized Z pinch based on the ZaP and ZaP-HD experiments. The FuZE device generates neutron-producing, 50-cm-long Z pinches formed from plasma accelerated through coaxial electrodes. The Z pinches are sustained between a nose cone at the tip of the plasma gun and an end wall at the end of the assembly region flux conserver. The end wall geometry is modified from a central hole to a spoked design and it is found that plasma exhaust is limited, but can be increased by increasing the ratio of ram and thermal pressures to the magnetic field pressure. The limited plasma exhaust results in a stagnation wave in the assembly region, increasing the plasma axial current and changing the shear flow profiles from a hollow to a peaked velocity distribution. The instantaneous neutron scaling with pinch current is investigated and it is found that the scaling corresponds to an adiabatic pinch where linear density increases with axial current. Lastly, the termination of plasma acceleration is found to be triggered by a blow-by instability starting at the insulator located at the breech end of the coaxial accelerator.

Experimental Investigation of Sheared Flow Stabilization of Z-pinches

Author : David Martinez
Publisher :
ISBN 13 :
Total Pages : 250 pages
Book Rating : 4.:/5 (846 download)

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Book Synopsis Experimental Investigation of Sheared Flow Stabilization of Z-pinches by : David Martinez

Download or read book Experimental Investigation of Sheared Flow Stabilization of Z-pinches written by David Martinez and published by . This book was released on 2011 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The wire array z-pinch is an efficient x-ray source [1] which has been proposed for use in indirect drive inertial confinement fusion schemes [2]. The z-pinch can become a more efficient x-ray source if its stability is improved. Cylindrical wire array z-pinch experiments where the Rayleigh-Taylor instability was suppressed showed increased x-ray yield and power [1]; however the pressure driven MHD instabilities (sausage and kink instabilities) were still present and possibly limited the x-ray production of the pinch. Linear MHD calculations of z-pinch stability with an axial velocity shear predict that a supersonic axial flow with a radial gradient is capable of stabilizing the MHD instabilities [3][4][5]. A sheared flow can be introduced to a pinch by using a conical wire array with a fine metallic wire on axis [6]. The wire on axis will carry a fraction of the total current during the implosion which will cause the center wire to create a conducting plasma column while a flow passes over it. This presentation will compare the experimental results of a z-pinch with and without a sheared flow. From this comparison it will be shown that the sheared flow in these experiments has a stabilizing effect on the MHD instabilities present in the z-pinch plasma column.

The ZaP Flow Z-Pinch Project

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (685 download)

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Book Synopsis The ZaP Flow Z-Pinch Project by :

Download or read book The ZaP Flow Z-Pinch Project written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The results from the ZaP experiment are consistent with the theoretical predictions of sheared flow stabilization. Z pinches with a sheared flow are generated in the ZaP experiment using a coaxial accelerator coupled to an assembly region. The current sheet in the accelerator initially acts as a snowplow. As the Z pinch forms, plasma formation in the accelerator transits to a deflagration process. The plasma exits the accelerator and maintains the flow in the Z pinch. During the quiescent period in the magnetic mode activity at z=0 cm, a stable Z pinch is seen on the axis of the assembly region. The evolution of the axial velocity profile shows a large velocity shear is measured at the edge of the Z pinch during the quiescent period. The velocity shear is above the theoretical threshold. As the velocity shear decreases towards 0.1kV{sub A}, the predicted stability threshold, the quiescent period ends. The present understanding of the ZaP experiment shows that it may be possible for the Z pinch to operate in a steady state if the deflagration process can be maintained by constantly supplying neutral gas or plasma to the accelerator.

Density Characteristics of a Sheared-flow Z-pinch

Author : Stuart L. Jackson
Publisher :
ISBN 13 :
Total Pages : 266 pages
Book Rating : 4.:/5 (768 download)

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Book Synopsis Density Characteristics of a Sheared-flow Z-pinch by : Stuart L. Jackson

Download or read book Density Characteristics of a Sheared-flow Z-pinch written by Stuart L. Jackson and published by . This book was released on 2006 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit: 2000-3350 - 2000-3399

Author :
Publisher :
ISBN 13 :
Total Pages : 578 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit: 2000-3350 - 2000-3399 by :

Download or read book 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit: 2000-3350 - 2000-3399 written by and published by . This book was released on 2000 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The ZaP Flow Z-Pinch Project - Final Technical Report

Author :
Publisher :
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (96 download)

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Book Synopsis The ZaP Flow Z-Pinch Project - Final Technical Report by :

Download or read book The ZaP Flow Z-Pinch Project - Final Technical Report written by and published by . This book was released on 2013 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ZaP Flow Z-Pinch Project is a project to extend the performance of the flow Z-pinch experiment at the University of Washington to investigate and isolate the relevant physics of the stabilizing effect of plasma flow. Experimental plasmas have exhibited an enhanced stability under certain operating parameters which generate a flow state (axial flows in Z-pinches and VH mode in tokamaks). Flow has also been suggested as the stabilizing mechanism in astrophysical jets.

Issues in Nuclear, High Energy, Plasma, Particle, and Condensed Matter Physics: 2011 Edition

Author :
Publisher : ScholarlyEditions
ISBN 13 : 1464963657
Total Pages : 2502 pages
Book Rating : 4.4/5 (649 download)

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Book Synopsis Issues in Nuclear, High Energy, Plasma, Particle, and Condensed Matter Physics: 2011 Edition by :

Download or read book Issues in Nuclear, High Energy, Plasma, Particle, and Condensed Matter Physics: 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 2502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Nuclear, High Energy, Plasma, Particle, and Condensed Matter Physics: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Nuclear, High Energy, Plasma, Particle, and Condensed Matter Physics. The editors have built Issues in Nuclear, High Energy, Plasma, Particle, and Condensed Matter Physics: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Nuclear, High Energy, Plasma, Particle, and Condensed Matter Physics in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Nuclear, High Energy, Plasma, Particle, and Condensed Matter Physics: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Physics of High-Density Z-Pinch Plasmas

Author : Michael A. Liberman
Publisher : Springer Science & Business Media
ISBN 13 : 1461214246
Total Pages : 285 pages
Book Rating : 4.4/5 (612 download)

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Book Synopsis Physics of High-Density Z-Pinch Plasmas by : Michael A. Liberman

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.

Ideal MHD

Author : Jeffrey P. Freidberg
Publisher : Cambridge University Press
ISBN 13 : 1107006252
Total Pages : 743 pages
Book Rating : 4.1/5 (7 download)

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Book Synopsis Ideal MHD by : Jeffrey P. Freidberg

Download or read book Ideal MHD written by Jeffrey P. Freidberg and published by Cambridge University Press. This book was released on 2014-06-26 with total page 743 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive, self-contained, and clearly written, this book describes the macroscopic equilibrium and stability of high temperature plasmas.

Diagnostic Development and Plasma-material Interaction Studies on the ZaP-HD Device

Author : Eleanor Glynis Forbes
Publisher :
ISBN 13 :
Total Pages : 147 pages
Book Rating : 4.:/5 (124 download)

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Book Synopsis Diagnostic Development and Plasma-material Interaction Studies on the ZaP-HD Device by : Eleanor Glynis Forbes

Download or read book Diagnostic Development and Plasma-material Interaction Studies on the ZaP-HD Device written by Eleanor Glynis Forbes and published by . This book was released on 2020 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ZaP-HD Flow Z-Pinch device was designed to investigate the use of a tri-axial electrode configuration to scale a sheared-flow stabilized Z pinch to high energy density conditions. Decoupling the power used to form the plasma from the power used to compress the pinch has resulted in temperatures and densities of 1 keV and 1 x 1018cm−3 during quiescent periods of up to 60 microseconds. After demonstrating improved performance through the use of two power supplies, the ZaP-HD machine has seen further use as a test-bed for diagnostic development and high energy density plasma-material interactions (PMI). Two novel diagnostics have been fielded on the ZaP-HD machine: time-resolved spectroscopy and three-dimensional digital holographic interferometry (DHI). Time-resolved spectroscopy is used to make simultaneous measurements of plasma temperature and velocity over the course of the plasma lifetime. Three-dimensional DHI is used to reconstruct the full 3D electron density structure of approximately three centimeters of the length of the Z-pinch. These two diagnostics used in concert with magnetic field probes and other measurements provide a detailed history of the Z-pinch behavior and give comprehensive information on the variation in pinch performance with initial conditions. A series of experiments were performed to better understand the role of plasma kinetic and thermal energy in material target deformation in high-energy density plasmas. Graphite and boron-nitride targets were exposed to plasmas of varying temperatures and velocities. Plasma behavior was monitored with a diagnostic suite and the targets were examined with high-resolution surface diagnostics to characterize any deformation caused by plasma exposure. Significant differences in the surface structure are seen for graphite targets. Features vary with plasma ion energy and with orientation to the plasma flow. Energy deposition and sputtering yield are calculated for various parameters. Targets exposed to high-energy plasma pulses are found to exceed the BN and graphite sublimation temperature. The data are used to calculate graphite erosion times and may be useful for designing electrodes on future experiments and reactor concepts.

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 10-13 July 2005, Tucson, Arizona: 05-3850 - 05-3899

Author :
Publisher :
ISBN 13 :
Total Pages : 458 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 10-13 July 2005, Tucson, Arizona: 05-3850 - 05-3899 by :

Download or read book 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 10-13 July 2005, Tucson, Arizona: 05-3850 - 05-3899 written by and published by . This book was released on 2005 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Studies on a "stabilized" Z-pinch

Author : Chaivitya Silawatshananai
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (221 download)

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Book Synopsis Studies on a "stabilized" Z-pinch by : Chaivitya Silawatshananai

Download or read book Studies on a "stabilized" Z-pinch written by Chaivitya Silawatshananai and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fusion Technology

Author :
Publisher :
ISBN 13 :
Total Pages : 414 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Fusion Technology by :

Download or read book Fusion Technology written by and published by . This book was released on 1996 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Physics of Electric Propulsion

Author : Robert G. Jahn
Publisher : Courier Corporation
ISBN 13 : 0486450406
Total Pages : 370 pages
Book Rating : 4.4/5 (864 download)

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Book Synopsis Physics of Electric Propulsion by : Robert G. Jahn

Download or read book Physics of Electric Propulsion written by Robert G. Jahn and published by Courier Corporation. This book was released on 2006-05-26 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Literaturangaben. - Originally published: New York, NY : McGraw-Hill, 1968

On the Dynamic Stabilization of a Z-pinch

Author : C. Andelfinger
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (839 download)

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Book Synopsis On the Dynamic Stabilization of a Z-pinch by : C. Andelfinger

Download or read book On the Dynamic Stabilization of a Z-pinch written by C. Andelfinger and published by . This book was released on 1968 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Magnetic Reconnection in Plasmas

Author : D. Biskamp
Publisher : Cambridge University Press
ISBN 13 : 9780521582889
Total Pages : 154 pages
Book Rating : 4.5/5 (828 download)

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Book Synopsis Magnetic Reconnection in Plasmas by : D. Biskamp

Download or read book Magnetic Reconnection in Plasmas written by D. Biskamp and published by Cambridge University Press. This book was released on 2000-09-14 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, first published in 2000, is a comprehensive introduction to this major topic in plasma physics; for graduates and researchers.

Relaxation Dynamics in Laboratory and Astrophysical Plasmas

Author : Patrick H. Diamond
Publisher : World Scientific
ISBN 13 : 9814291552
Total Pages : 332 pages
Book Rating : 4.8/5 (142 download)

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Book Synopsis Relaxation Dynamics in Laboratory and Astrophysical Plasmas by : Patrick H. Diamond

Download or read book Relaxation Dynamics in Laboratory and Astrophysical Plasmas written by Patrick H. Diamond and published by World Scientific. This book was released on 2010 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. Prof. Masahiro Wakatani and fusion research in his days / K. Itoh. Magnetic relaxation and self-organization in astrophysical and laboratory plasmas. 2. An introduction to mean field dynamo theory / D. W. Hughes and S. M. Tobias. 3. Origin, structure and stability of astrophysical MHD jets / P.-Y. Longaretti -- Turbulence and turbulent transport - the agents of relaxation and structure formation. 4. A tutorial on basic concepts in MHD turbulence and turbulent transport / P. H. Diamond, S.-I. Itoh and K. Itoh. 5. Intermittency like phenomena in plasma turbulence / A. Das, P. Kaw and R. Jha. 6. Nonlinear cascades and spatial structure of magnetohydrodynamic turbulence / W.-C. Müller and R. Grappin. 7. Scale covariance and scale-ratio covariance in turbulent front propagation / A. Pocheau -- Transport bifurcations and relaxation. 8. Transport barrier relaxations in tokamak edge plasmas / P. Beyer. 9. Dynamics of edge localized modes / X. Garbet ... [et al.]. 10. On the onset of collapse events in toroidal plasmas turbulence trigger / K. Itoh ... [et al.].