The scaling of plasma turbulence, turbulent particle flux and cross-phase withshear in the edge of the TEXTOR-94 tokamak is obtained from measurements from fastscanning probes and compared with various existing analytical theories. It is found that thescaling can be expressed as a second order polynomial and that the cross-phase plays a keyrole in the suppression of particle flux. The variable rate of shear, kept below the valuerequired to produce a low to high particle confinement transition, was obtained bychanging, on a shot to shot basis, the voltage applied to an electrode introduced 4 cm into theplasma.
Electrostatic transport reduction induced by flow shear modification in a reversed field pinch plasma