Theiler, Christian GabrielFurno, IvoLoizu, JoaquimFasoli, Ambrogio2012-02-182012-02-182012-02-18201210.1103/PhysRevLett.108.065005https://infoscience.epfl.ch/handle/20.500.14299/77871WOS:000300102900016Blob control by creating convective cells using biased electrodes is demonstrated in simple magnetized toroidal plasmas. A two-dimensional array of electrodes is installed on a metal limiter to obtain different biasing schemes. Detailed two-dimensional measurements across the magnetic field reveal the formation of a convective cell, which shows a high degree of uniformity along the magnetic field. Depending on the biasing scheme, radial and vertical blob velocities can be varied significantly. A high level of cross-field currents limits the achievable potential variations to values well below the applied bias voltage. Furthermore, the strongest potential variations are not induced along the biased flux tube, but at a position shifted in the direction of plasma flows.PlasmaFilamentBlobBlob controlSOLConvective cellCross-field currentTORPEXspc_edgetext::journal::journal article::research article