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Author: David M. Woodall Publisher: ISBN: Category : Languages : en Pages : 160
Book Description
A high voltage dense plasma focus powered by a single-stage Marx bank was designed, built and operated. The maximum bank parameters are: voltage--120 kV, energy--20 kJ, short-circuit current--600kA. The bank impedance is about 200 millohms. The plasma focus center electrode diameter is 1.27 cm. The outer electrode diameter is 10.16 cm. Rundown length is about 10 cm, corresponding to a bank quarter period of about 900 millohms ns. Rundown L is about 50 milliohms. The context of this work is established with a review of previous plasma focus theoretical, experimental and computational work and related topics. Theoretical motivation for high voltage operation is presented. The design, construction and operation of this device are discussed in detail. Results and analysis of measurements obtained are presented. Device operation was investigated primarily at 80 kV (9 kJ), with a gas fill of about 1 torr H2, plus 3-5 percent A. The following diagnostics were used: gun voltage and current measurements; filtered, time-resolved x-ray PIN measurements of the pinch region; time integrated x-ray pinhole photographs of the pinch region; fast-frame visible light photographs of the sheath during rundown; and B probe measurements of the current sheath shortly before collapse. Keywords: Coaxial Plasma Discharge, Dense Plasma Focus (DPF), and Pulsed Neutron Source.
Author: David M. Woodall Publisher: ISBN: Category : Languages : en Pages : 160
Book Description
A high voltage dense plasma focus powered by a single-stage Marx bank was designed, built and operated. The maximum bank parameters are: voltage--120 kV, energy--20 kJ, short-circuit current--600kA. The bank impedance is about 200 millohms. The plasma focus center electrode diameter is 1.27 cm. The outer electrode diameter is 10.16 cm. Rundown length is about 10 cm, corresponding to a bank quarter period of about 900 millohms ns. Rundown L is about 50 milliohms. The context of this work is established with a review of previous plasma focus theoretical, experimental and computational work and related topics. Theoretical motivation for high voltage operation is presented. The design, construction and operation of this device are discussed in detail. Results and analysis of measurements obtained are presented. Device operation was investigated primarily at 80 kV (9 kJ), with a gas fill of about 1 torr H2, plus 3-5 percent A. The following diagnostics were used: gun voltage and current measurements; filtered, time-resolved x-ray PIN measurements of the pinch region; time integrated x-ray pinhole photographs of the pinch region; fast-frame visible light photographs of the sheath during rundown; and B probe measurements of the current sheath shortly before collapse. Keywords: Coaxial Plasma Discharge, Dense Plasma Focus (DPF), and Pulsed Neutron Source.
Author: Joseph W. Mather Publisher: ISBN: Category : Electrons Languages : en Pages : 16
Book Description
The influence of small dc 'axial' magnetic fields upon the stability of a focused plasma column is shown by use of soft x rays. Material damage to the center electrode and the intense x-ray emission at the electrode face resulting from electron bombardment are considerably reduced. Although the final heating of the ions and electrons is inhibited as expected owing to a trapped magnetic field, the spatial stability of the focused column offers greater possibility for scaling to higher energies.
Author: Publisher: ISBN: Category : Languages : en Pages : 28
Book Description
The final Z-pinch stage of a Dense Plasma Focus (DPF) could be used as a simple, compact, and potentially rugged plasma-based high-gradient accelerator with fields at the 100 MV/m level. In this paper we review previously published experimental beam data that indicate the feasibility of such an DPF-based accelerator, qualitatively discuss the physical acceleration processes in terms of the induced voltages, and as a starting point examine the DPF acceleration potential by numerically applying a self-consistent DPF system model that includes the induced voltage from both macroscopic and instability driven plasma dynamics. Applications to the remote detection of high explosives and a multi-staged acceleration concept are briefly discussed.
Author: Michael A. Liberman Publisher: Springer Science & Business Media ISBN: 1461214246 Category : Science Languages : en Pages : 285
Book Description
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.
Author: J Reece Roth Publisher: CRC Press ISBN: 9781420050868 Category : Science Languages : en Pages : 572
Book Description
This book will provide the necessary theoretical background and a description of plasma-related devices and processes that are used industrially for physicists and engineers. It is a self-contained introduction to the principles of plasma engineering with comprehensive references. This volume also includes the terminology, jargon and acronyms used in the field of industrial plasma engineering - indexed when they first appear in the text - along with their definitions and a discussion of their meaning. It is aimed at assisting the student in learning key terminology and concepts, and providing the in-service engineer or scientist with a technical glossary. An extensive index and appendices enhance the value of this book as a key reference source. These incorporate a list of the nomenclature used in mathematical expressions in the text, physical constants, and often-used plasma formulae. SI units are used throughout. Intended for students from all engineering and physical science disciplines, and as a reference source by in-service engineers. Coverage: * basic information on plasma physics and the physical processes important in industrial plasmas * sources of ion and electron beams and ionizing radiation used in industrial applications * physics and technology of DC and RF electrical discharges.
Author: George Randall Neil Publisher: ISBN: Category : Dense plasma focus Languages : en Pages : 164
Book Description
This report describes investigations of the dense plasma focus designed to study turbulent processes. A CO2 laser collective scattering experiment with a high sensitivity was performed to measure the collective fluctuation spectrum. Scattering was observed from small, overdense regions and was correlated with micropinches seen in soft X-ray photographs. Bremsstrahlung was measured near the electron plasma frequency to determine a possible role for beam plasma instabilities. Only thermal bremsstrahlung levels were detected. (Author).
Author: David M. Woodall
Author: David M. Woodall
Author: Brian Howard Fishbine
Author: Ja Hyun Lee
Author: Joseph W. Mather
Author: 
Author: 
Author: Michael A. Liberman
Author: Archana Sharma
Author: J Reece Roth
Author: George Randall Neil