Chaos healing by separatrix disappearance and quasisingle helicity states of the reversed field pinch

D.F. Escande, R. Paccagnella, S. Capello, C. Marchetto, F. D'Angelo

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Taking the magnetic chaos related to quasisingle helicity (QSH) states of numerical simulations of the RFP, it was demonstrated that the resilience to chaos of a one-parameter one-degree-of-freedom Hamiltonian dynamics increases when its corresponding separatrix vanishes due to a saddle-node bifurcation. Evidence was obtained, indicating that the resonance overlap picture can predict the absence of thermal structures with m=1 polloidal symmetry for QSH plasmas.
Original languageEnglish
Pages (from-to)3169 - 3172
Number of pages4
JournalPhysical Review Letters
Issue number15
Publication statusPublished - 9 Oct 2000
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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