Results 301 to 310 of about 11,707,706 (349)
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Radiation-Dominated Relativistic Current Sheets
Physical Review Letters, 2009Relativistic current sheets (RCSs) feature plasma instabilities considered as the potential key to magnetic energy dissipation in Poynting-flux-dominated plasma flows. Kinetic plasma simulations show that the physical nature of RCS evolution changes in the presence of radiation losses: In the ultrarelativistic regime (i.e., magnetization parameter ...
C H, Jaroschek, M, Hoshino
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The magnetohydrodynamics of current sheets
Reports on Progress in Physics, 1985Examples of current sheets are summarized and their formation is described. A universal phenomenon in cosmic plasmas is the creation of sheets off intense current near X-type neutral points (where the magnetic field vanishes). These sheets are important as sites where the magnetic-field energy is converted efficiently into heat and bulk kinetic energy ...
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Magnetic reconnection via current sheets
The Physics of Fluids, 1986A general picture of magnetic reconnection in the framework of 2-D incompressible resistive magnetohydrodynamic theory is presented. Numerical studies of (quasi-) steady-state driven reconnection reveal current sheet formation for Mach numbers M=u/vA exceeding the Sweet–Parker reconnection rate MSP=(η/LvA)1/2. Since the thickness δ of the current sheet
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Vertical displacements of the current sheet and Hall currents
JETP Letters, 2014Vertical displacements of the peripheral regions of the current sheet with respect to its mean plane have been detected in the case of the sheet formation in the three-dimensional configuration with the X line and longitudinal component of the magnetic field.
A. G. Frank, S. N. Satunin
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2018
Magnetohydrodynamic (MHD) theories have defined space plasma boundaries of large-scale structures through discontinuous macroscopic parameters such as density and temperature in the same way ordinary fluid boundaries are defined. However, space plasmas are coupled to electric E and magnetic B fields, and therefore the boundary requirements must also ...
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Magnetohydrodynamic (MHD) theories have defined space plasma boundaries of large-scale structures through discontinuous macroscopic parameters such as density and temperature in the same way ordinary fluid boundaries are defined. However, space plasmas are coupled to electric E and magnetic B fields, and therefore the boundary requirements must also ...
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The current‐voltage relationship in auroral current sheets
Journal of Geophysical Research: Space Physics, 1987The current‐voltage relation within narrow auroral current sheets is examined through the use of high‐resolution data from the high‐altitude Dynamics Explorer 1 satellite. The north‐south perpendicular electric field and the east‐west magnetic field are shown for three cases in which there are large amplitude, oppositely directed paired electric fields
D. R. Weimer +5 more
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Evolutionarity of current sheets
1994The continuous MHD motion of a perfectly conducting medium is impossible in the zero point of a magnetic field, in which the electric field differs from zero. In the vicinity of this point the frozen-in condition breaks down and, in compliance with the statement of Syrovatskii (1971) (see Section 4.3; Chapter 12), the reconnecting current sheet (RCS ...
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Structure of Longitudinal and Transverse Currents in Current Sheets
Plasma Physics Reports, 2018The structure of magnetic fields and currents in current sheets formed in 2D and 3D magnetic configurations with an X line is analyzed using experimental data. It is found that, in addition to the main (longitudinal) current, transverse currents comparable in magnitude with the main current are also generated in current sheets.
A. G. Frank, S. N. Satunin
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The Physics of Fluids, 1964
An adiabatic two-fluid model is used to discuss generalized solutions for the structure of a plane bounded current sheet in a plasma. The current sheet is advancing in a region with no magnetic field. Numerical results for time-independent solutions are given for different values of the ratio of the velocity of the sheet to the Alfvén velocity referred
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An adiabatic two-fluid model is used to discuss generalized solutions for the structure of a plane bounded current sheet in a plasma. The current sheet is advancing in a region with no magnetic field. Numerical results for time-independent solutions are given for different values of the ratio of the velocity of the sheet to the Alfvén velocity referred
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Hall currents in a current sheet: Structure and dynamics
Physics of Plasmas, 2008Experimental results are presented from the study of the structure and time evolution of the Hall currents in the current sheets produced in the two-dimensional magnetic fields with the null line of the X type, in plasmas with heavy ions. Three-component magnetic fields generated by plasma currents were measured, and particular emphasis was placed on ...
Anna G. Frank +2 more
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