Results 201 to 210 of about 34,988 (230)
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Pinching Processes in Semiconductor Plasmas
Journal of the Physical Society of Japan, 1970Adiabatic compression model for the linear pinch in avalanching n -InSb is studied experimentally. The pinching radial velocity and the final pinched radius are determined from the cross sectional dependence of the pinch time, and compared with the theory.
Munecazu Tacano, Shoei Kataoka
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Axial structure in a theta-pinch plasma
The Physics of Fluids, 1973Axial irregularities in a θ-pinch plasma are observed during the initial breakdown and main discharge phases. The structure is associated with a gas-breakdown effect. Wavelengths and growth times are consistent with the development of instabilities associated with thermal waves.
Dixon, R., Duechs, D., Elton, R.
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Vortex-Induced Diffusivity In Reversed Field Pinch Plasmas
Physical Review Letters, 2004Coherent structures identified in two reversed field pinch experiments are interpreted as a dynamic balance of dipolar and monopolar vortices growing and evolving under the effect of the ExB flow shear. For the first time their contribution to the anomalous transport has been estimated in fusion related plasmas, showing that they can account for up to ...
Spolaore M +9 more
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1999
A fully consistent approach requires a study of Z-pinch dynamics. We emphasize the dynamics of Z-pinch plasmas or imploding plasmas, since dynamics certainly substantially affects Z-pinch parameters. While the pulsed-power generator characteristics strongly affect pinch parameters, depending on the goal of applications (fusion, neutron production, x ...
Michael A. Liberman +3 more
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A fully consistent approach requires a study of Z-pinch dynamics. We emphasize the dynamics of Z-pinch plasmas or imploding plasmas, since dynamics certainly substantially affects Z-pinch parameters. While the pulsed-power generator characteristics strongly affect pinch parameters, depending on the goal of applications (fusion, neutron production, x ...
Michael A. Liberman +3 more
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Radial Plasma Dynamic in Sequential Pinches
IEEE Transactions on Plasma Science, 2009Plasma 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 +3 more
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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 +3 more
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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 +3 more
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Rotation of Plasmas in θ Pinches
The Physics of Fluids, 1962It is shown that the difference in kinetic'' and canonical'' angular momenta in plasma is negligible. (L.N.N.)
Norman Rostoker, Alan C. Kolb
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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 +3 more
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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 +3 more
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Nitrogen laser system for diagnosing z-pinch and x-pinch plasmas
Review of Scientific Instruments, 1997A nitrogen laser system built to probe dense z-pinch and x-pinch plasmas is described. This low-cost system consists of an atmospheric pressure oscillator and a low pressure amplifier. It generates a 1-cm-diam 3371 Å laser beam with approximately 0.33 mJ in a ≲1 ns pulse, and with a coherence length of at least 5 cm. This laser has been used in several
Daniel H. Kalantar +2 more
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Ultrasonic attenuation in magnetothermally pinched plasma
Physics Letters A, 1972Abstract Ultrasound attenuations in n-InSb are measured under the applied dc pulse. The increase of attenuation is observed above the threshold current for pinching and is explained as Akhieser loss in the magnetothermally pinched region.
K. Tanaka, A. Odajima, Y. Abe
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