TITLE

Transition to chaos in a driven dusty plasma

AUTHOR(S)
Sheridan, T. E.; Theisen, W. L.
PUB. DATE
January 2010
SOURCE
Physics of Plasmas;Jan2010, Vol. 17 Issue 1, p013703
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Dynamical chaos has previously been observed experimentally in a driven dusty plasma with three particles [T. E. Sheridan, Phys. Plasmas 12, 080701 (2005)]. In the present work, the transition to chaos in this system is studied as a function of the amplitude of a periodic driving force for two different driving frequencies fd. It is found that the system follows a quasiperiodic route to chaos. The dusty plasma’s center-of-mass modes are driven by the first harmonic of fd and lock to the driving force for small driving amplitudes. The breathing mode is driven by the second harmonic of fd and shows asymmetric spectral features indicating quasiperiodic dynamics for intermediate driving amplitudes. For large driving forces both the center-of-mass and breathing modes are entrained and a region of low-dimensional chaotic dynamics due to a resonance overlap is observed. In the chaotic regime the correlation dimension and Lyapunov exponent are found to increase with the driving force.
ACCESSION #
47807078

 

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