Results 201 to 210 of about 78,726 (246)
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Physica Scripta, 1982
We discuss the generalized Zakharov equations derived by Ovenden and Statham and given reasons for being sceptical about using the fluid approximation as is done in the derivation of these equations - except perhaps for those situations which involve weakly magnetized Langmuir plasmas and we also compare them with equations suggested by other authors ...
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We discuss the generalized Zakharov equations derived by Ovenden and Statham and given reasons for being sceptical about using the fluid approximation as is done in the derivation of these equations - except perhaps for those situations which involve weakly magnetized Langmuir plasmas and we also compare them with equations suggested by other authors ...
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Turbulent Particle Transport in Magnetized Plasmas
Physical Review Letters, 2003Particle transport in magnetized plasmas is investigated with a fluid model of drift wave turbulence. An analytical calculation shows that magnetic field curvature and thermodiffusion drive an anomalous pinch. The curvature driven pinch velocity is consistent with the prediction of turbulence equipartition theory.
Garbet X +6 more
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Barriers for Transport in Turbulent Plasmas
Physical Review Letters, 2003The control of transport due to electrostatic turbulence is investigated using test-particle simulations. We show that a barrier for the transport, that is, a region where transport is reduced, can be generated through the randomization of phases of the turbulent field.
CARBONE, Vincenzo +2 more
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Plasma Wave Echo in a Weakly Turbulent Plasma
The Physics of Fluids, 1970The effects of turbulent fluctuations on the plasma wave echo have been investigated for a one-dimensional weakly turbulent electron plasma. It has been found that the interaction between electrons and fluctuations gives rise to (i) damping of the plasma echo, (ii) shift of the maximum position of plasma echo, and (iii) suppression of the peak ...
Ichikawa, Y. H., Sanuki, H.
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Electromagnetic scattering from turbulent plasmas
Physical Review A, 1992A self-consistent multiple-scattering theory of vector electromagnetic waves scattered from a turbulent plasma is presented. This approach provides a general and systematic treatment to all orders in turbulence of the scattering of electromagnetic waves in terms of the properties of the turbulent structure of the scattering system and is applicable in ...
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Soviet Atomic Energy, 1978
In future D--T tokamak power r e a c t o r s the t he rma l f luxes f r o m the p l a sma to the wall will be 0.4-1 M W / m 2. With a p l a s m a t e m p e r a t u r e of 10-20 keV at the axis of the r e a c t o r , a densi ty n ~ 102~ m "s, and a smal l f rac t ion of multiply charged impuri ty ions, radia t ion may play only a s econd-o rde r ro le ...
N. N. Vasil'ev +3 more
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In future D--T tokamak power r e a c t o r s the t he rma l f luxes f r o m the p l a sma to the wall will be 0.4-1 M W / m 2. With a p l a s m a t e m p e r a t u r e of 10-20 keV at the axis of the r e a c t o r , a densi ty n ~ 102~ m "s, and a smal l f rac t ion of multiply charged impuri ty ions, radia t ion may play only a s econd-o rde r ro le ...
N. N. Vasil'ev +3 more
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Nonlinear Optics: Materials, Fundamentals and Applications, 2007
We consider an all-optical bump-on-tail instability. For weak nonlinearity, there is momentum transfer with no variation in intensity. Above a threshold, modulations appear. Borrowing plasma language, these represent weak and strong regimes of optical turbulence.
Dmitry V. Dylov, Jason W. Fleischer
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We consider an all-optical bump-on-tail instability. For weak nonlinearity, there is momentum transfer with no variation in intensity. Above a threshold, modulations appear. Borrowing plasma language, these represent weak and strong regimes of optical turbulence.
Dmitry V. Dylov, Jason W. Fleischer
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1979
Abstract : This research involved measurements of plasma heating using electron beams, anomalous dc resistivity, and double layers. In addition, the development of a compact x-ray source is being investigated. An extensive set of measurements of the interactions of an electron beam with a collisionless plasma is summarized.
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Abstract : This research involved measurements of plasma heating using electron beams, anomalous dc resistivity, and double layers. In addition, the development of a compact x-ray source is being investigated. An extensive set of measurements of the interactions of an electron beam with a collisionless plasma is summarized.
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Tokamak plasma turbulence visualization
Proceedings Visualization '94, 2002One of the most fundamental issues in magnetic fusion research is the understanding of turbulent transport observed in present-day tokamak experiments. Plasma turbulence is very challenging from a theoretical point of view due to the nonlinearity and high dimensionality of the governing equations.
S.E. Parker, R. Samtaney
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Turbulence in boundary plasmas
Journal of Nuclear Materials, 1999Abstract We simulate boundary plasma turbulence using a 3D turbulence code BOUT and a linearized electromagnetic instability shooting code BAL. The code BOUT solves fluid equations for plasma vorticity, density, ion temperature and parallel momentum (along the magnetic field), electron temperature, and parallel momentum.
X.Q. Xu +5 more
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