Low-dimensional chaos and wave turbulence in plasmas.
We investigated drift-wave turbulence in the plasma edge of a small tokamak by considering solutions of the Hasegawa-Mima equation involving three interacting modes in Fourier space. The resulting low-dimensional dynamics presented periodic as well as chaotic evolution of the Fourier-mode amplitudes, and we performed the control of chaotic behaviour through the application of a fourth resonant wave of small amplitude.
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Departamento de Matemática e Estatística, Universidade Estadual de Ponta Grossa, 84033-240 Ponta Grossa, Paraná, Brazil.
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