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Intermittent positive bursts of plasma density detected by Langmuir probes atthe edge of the TEXTOR tokamak are investigated. Burst statistical propertiesand temporal characteristics together with their radial dependence are studiedin two different regimes - with electrode biasing and dynamic ergodic divertor(DED). Similar modification of intermittent burst characteristics are observed.Namely, the average burst rate increases and the average burst durationdecreases compared to Ohmic conditions. Statistical properties are alsomodified in the same way in both regimes. The reason is that biasing andcertain regimes of DED cause the modification of radial electric field whichaffects similarly the dynamics of coherent turbulent structures and plasmatransport through ErxBt induced sheared poloidal rotation. Thus, after detailedinvestigations and refinement, certain regimes of DED can be used as"contactless biasing" for the external control of plasma turbulent transport infusion devices.

Similar Modification of Intermittent Density Bursts by Electrode Biasing and Dynamic Ergodic Divertor in the TEXTOR Tokamak