Alfvén intermittency in space plasmas

Details Alfvén intermittency in space plasmas Alfvén intermittency in space plasmas

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jastp..67.1837r&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, v. 67, iss. 17-18 [SPECIAL ISSUE], p. 1837-1842.

Physics

1

Scientific paper

The onset of Alfvén intermittent chaos in space plasmas is studied by numerically solving the derivative non-linear Schrödinger equation (DNLS) under the assumption of stationary Alfvén waves. We describe how the Alfvénic fluctuations of the magnetic field can evolve from periodic to chaotic behavior through a sequence of bifurcations as the plasma dissipation is varied. The collision of a chaotic attractor with an unstable periodic orbit leads to the generation of strongly chaotic behavior, in an event known as interior crisis. We also show that in the DNLS equation, chaotic attractors coexist with nonattracting chaotic sets responsible for transient chaotic behaviors. After the interior crisis point, a wide chaotic attractor can be decomposed into two coupled nonattracting chaotic sets, resulting in intermittent chaotic time series. Understanding transient chaos is a key to understand intermittency in space plasmas.

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