Physics – Plasma Physics
Scientific paper
2010-12-06
Plasma Physics and Controlled Fusion 53 12 (2011) 125008
Physics
Plasma Physics
13 pages, 9 figures, 1 column
Scientific paper
10.1088/0741-3335/53/12/125008
We consider the radial transport of test particles due to the ExB drift motion in the guiding center approximation. Using an explicit expression to modify the electrostatic potential, we show that it is possible to construct a transport barrier which suppresses radial transport. We propose an algorithm for the implementation of this local modification computed from an electrostatic potential known on a spatio-temporal grid. The number of particles which escape the inner region defined by the barrier measures the efficiency of the control. We show that the control is robust by showing a significant reduction of radial transport, when applied with a reduced number of probes aligned on a circle.
Chandre Cristel
Ciraolo Guido
Ghendrih Philippe
Izacard Olivier
Tronko Natalia
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