Abstract:The effects of positive and negative bias voltages on the turbulence characteristics in edge plasmas of J-TEXT are studied using Langmuir probe arrays. The experimental results illustrate that the turbulent particle transport fluxes are suppressed in both positive and negative bias cases, while the suppression mechanisms are quite different. For the positive bias (+300 V), the long-range correlation (LRC) structures with frequencies of about 10 ~ 30 kHz are generated, which are beneficial for the turbulent tra… Show more
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