Abstract
The transport properties of electrostatic turbulence in plasmas are investigated by using test-particle simulations. In particular, the possibility of control of the transport in a given synthetic turbulent field, which evolves both in space and time, is explored. The fluctuations are built up taking into account observations of real turbulence in laboratory plasmas, that is, by allowing the field to contain structures lying on all dynamically interesting scales. It is shown that, inside a given region of space, the transport can be reduced when phases of the field are randomized, that is, when correlations of the field, which are responsible for the generation of structures, are annihilated. This means that a barrier for the transport can be achieved in a plasma even without actually suppressing turbulence. When the barrier is active, a flux of particles toward the center of the simulation box is present inside the region where the barrier has been located.
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