Results 221 to 230 of about 35,157 (258)

Dense plasma in Z-pinches and the plasma focus

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1981
Abstract Many of the earliest experiments in controlled thermonuclear fusion research were Z-pinches. However these pinches were found to be highly unstable to the m = 0, the m — 1 (kink), and the Rayleigh-Taylor instability. The addition of an axial magnetic field and the removal of end losses by proceeding to a toroidal geometry has
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Radial Plasma Dynamic in Sequential Pinches

IEEE Transactions on Plasma Science, 2009
Plasma dynamic and confinement characteristics were investigated with magnetic probes in a theta pinch operating with oscillatory current waveform and hydrogen gas at pressure between 45 and 150 mtorr. Current-sheath implosion was evident after the third half cycle until sixth half cycle when the external current has practically decayed.
Kayama, Milton Eiji, Clemente, Roberto Antonio, Honda, Roberto Yzumi, Dobrowolsky, Marcelo Schubert   +3 more
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Stability of Z-Pinch Plasmas

1999
The stability of Z-pinch plasmas is a primary research area and has been actively pursued in both theoretical and experimental investigations. Plasma instabilities can be conveniently divided into two classes: hydrodynamic instabilities and kinetic instabilities. Hydrodynamic instabilities are caused by macroscopic motions of the plasma.
Michael A. Liberman, John S. De Groot, Arthur Toor, Rick B. Spielman   +3 more
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Equilibria of Z-Pinch Plasmas

1999
The Z pinch represents the simplest one-dimensional (1-D) model of the toroidal configuration. The parameters of Z-pinch plasmas can be estimated in a very simple way, if a steady-state equilibrium is assumed (Bennett, 1934; Blackman, 1951). This simplifying assumption rarely can be justified fully, taking into account the intrinsically dynamic nature ...
Michael A. Liberman, John S. De Groot, Arthur Toor, Rick B. Spielman   +3 more
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Plasma formation in a gas-liner pinch

Journal of Physics D: Applied Physics, 1983
A gas-liner pinch is optimised for Stark broadening investigations. To obtain the desired discharge conditions the gas injection, the preionisation and geometrical aspects of the discharge chamber are analysed. Quantitative agreement is found between the observed plasma compression and a 'snow-plough' model.
null K H Finken, null U Ackermann
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The interaction of plasma with quartz surfaces in pinch discharges

Journal of Nuclear Materials, 1978
Abstract The interaction of plasma with quartz walls was investigated in theta pinch discharges preionized by axial discharges at filling pressures below 12 mTorr. Implantation and sputtering of hydrogen and deuterium in the surface was deduced from neutron yield and Balmer line intensity measurements. A simple model describing these processes yields
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Pinch Motion of a Cylindrical Plasma

Journal of the Physical Society of Japan, 1963
The self-pinch motion of a cylindrical plasma is analyzed by using the two-fluid model of electrons and ions. The Lorentz force caused by currents flowing through the plasma along the cylindrical axis acts only on the electrons, because most part of the current is carried by the electrons.
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Plasma Conductivity and Temperature in a Theta Pinch

The Physics of Fluids, 1966
Using a new balanced magnetic probe technique the plasma magnetic field in a theta pinch has been measured independently of the drive field. The measurements allow a determination of the total plasma current versus time and the plasma current radius versus time.
Robert W. Harris, J. E. McClintock
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The Joule Heating of a Stable Pinched Plasma

Proceedings of the Physical Society, 1960
The hydromagnetic equations are employed to obtain the conditions necessary for a pressure balance in a pinched discharge in ionized deuterium. The time dependent energy equation is integrated to give the time taken to heat the plasma by Joule heating with bremsstrahlung radiation losses only, and with a pressure balance maintained at all time.
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Plasma pinch

Physics World, 2017
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