Wavelet Correlation between Electrostatic and Magnetic Plasma Oscillations in the Tokamak TBR.
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概要
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Wavelet spectrum and bispectrum techniques were applied to study nonstationary turbulence at the plasma edge of the TBR tokamak. Evidence of nonlinear phase coupling is more significant for magnetic than for electrostatic fluctuations. On a single discharge basis, the data also exhibit intermittent episodes of linear and nonlinear coupling between electrostatic and magnetic field oscillations. Furthermore, application of resonant perturbing magnetic fields reduces the amplitude of low frequency fluctuations and shift the frequency range of the maximum quadratic intermittent coupling to larger scales. These alterations, observed not only for magnetic but also for electrostatic oscillations, support the possibility of roughly altering electrostatic oscillations, therefore transport, through controlling oscillating magnetic fields.
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THE PHYSICAL SOCIETY OF JAPAN | 論文
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