Chaos-induced resistivity in the magnetic null region: A nonlinear mechanism of collisionless dissipation

Details Chaos-induced resistivity in the magnetic null region: A nonlinear mechanism of collisionless dissipation Chaos-induced resistivity in the magnetic null region: A nonlinear mechanism of collisionless dissipation

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phrve..68a6407n&link_type=abstract

Physical Review E, vol. 68, Issue 1, id. 016407

Physics

2

Particle Orbits, Nonlinear Dynamics And Chaos

Scientific paper

Magnetic null points act as scattering centers where particles describe chaotic orbits, and the mixing effect brings about increase of the kinetic entropy. The resultant “chaos-induced resistivity” may explain anomalous diffusion of current in magnetic null regions [Phys. Rev. Lett. 88, 045003 (2002)], which can be much larger than the conventional collisionless resistivity in a high temperature plasma. To study the statistical properties of the system (such as Lyapunov exponents and distribution functions), strong spatial inhomogeneity of the system has been studied to specify the responsible “chaos region.”

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