Force balance in current sheets in collisionless plasma
نویسندگان
چکیده
منابع مشابه
Magnetic Weibel field generation in thin collisionless current sheets in reconnection in space plasma
In collisionless reconnection in space plasma like the magnetospheric tail or magnetopause current layer, magnetic fields can grow from thermal level by the action of the non-magnetic Weibel instability driven in thin (∆ < few λi) current layers by the counter-streaming electron inflow from the ‘ion diffusion’ (ion inertial Hall) region into the inner current (electron inertial) region from whe...
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If the current sheet between adjacent twisted magnetic °ux tubes is suf̄ciently thin, the electron °ow velocity becomes comparable to the Alfv¶en velocity and can destabilize collisionless Alfv¶en waves. The threshold for instability in force-free plasmas is calculated for both inertial and kinetic Alfv¶en wave regimes. When there is strong magnetic shear, unstable kinetic Alfv¶en waves can reso...
متن کاملKinetic theory and simulation of collisionless tearing in bifurcated current sheets
Observations from the Earth’s geomagnetic tail have established that the current sheet is often bifurcated with two peaks in the current density. These so-called bifurcated current sheets have also been reported in a variety of simulations and often occur in conjunction with significant temperature anisotropy. In this work, a new self-consistent Vlasov equilibrium is developed that permits both...
متن کاملMagnetic Flux Braiding: Force-Free Equilibria and Current Sheets
We use a numerical nonlinear multigrid magnetic relaxation technique to investigate the generation of current sheets in three-dimensional magnetic flux braiding experiments. We are able to catalogue the relaxed nonlinear force-free equilibria resulting from the application of deformations to an initially undisturbed region of plasma containing a uniform, vertical magnetic field. The deformation...
متن کاملComputer Simulation of the Three-dimensionsal De- Cay of Thin Collisionless Current Sheets
Recent theoretical investigations and simulations of collisionless space plasma current sheets have claimed their stabilisation against reconnection by nite cross-sheet magnetic eld components. However, all these theoretical investigations and simulations were based on two-dimensional models. Currrently we have shown that the energy variations change quite a bit as soon as one considers the pro...
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ژورنال
عنوان ژورنال: Solnechno-Zemnaya Fizika
سال: 2021
ISSN: 2712-9640
DOI: 10.12737/szf-72202102