Abstract
The self-organized oscillation of a strongly coupled dust Coulomb cluster with an elongated cross section in a weakly ionized rectangular plasma trap is investigated. Through an inverse supercritical bifurcation at the low rf power end, a low-frequency (about 5 Hz) limit cycle oscillation of the whole cluster associated with the intracluster compressional lattice wave and phase-locked oscillation of the glow intensity distribution is observed. It is caused by the interplay of the dust motion and the shrinking and expanding of the confining dark space.
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