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Bench mark test of the code for nonlinear simulation of plasma turbulence is performed. A new code describing four fields (B) is compared to the existing code (A) which treats three fields. Examining ...the results from two codes under the physically identical conditions, characteristics of the deviations are analyzed. It is found that the infinitesimally small initial noise, due to the cancelling, grows in accordance with the nonlinear development of turbulence mode. Interaction with an intrinsic nonlinearity of the system makes the noise grow, whose contribution becomes similar magnitude to the fluctuation itself of the results. The instantaneous deviation shows the chaotic characteristics. The spectrum analysis is made. These show the intrinsic nonlinearity of the plasma turbulence.show more
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