“Diffusion” region of magnetic reconnection: electron orbits and the phase space mixingстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:The nonlinear dynamics of electrons in the vicinity
of magnetic field neutral lines during magnetic reconnection,
deep inside the “diffusion” region where the electron motion
is nonadiabatic, has been numerically analyzed. Test particle
orbits are examined in that vicinity, for a prescribed planar
two-dimensional magnetic field configuration and with a
prescribed uniform electric field in the neutral line direction.
On electron orbits, a strong particle acceleration occurs due
to the reconnection electric field. Local instability of orbits
in the neighborhood of the neutral line is pointed out. It combines
with finiteness of orbits due to particle trapping by the
magnetic field, and this should lead to the effect of mixing in
the phase space, and the appearance of dynamical chaos. The
latter may presumably be viewed as a mechanism producing
finite “conductivity” in collisionless plasma near the neutral
line. That conductivity is necessary to provide violation of
the magnetic field frozen-in condition, i.e., for magnetic reconnection
to occur in that region.