Mg. Shats et Dl. Rudakov, REVERSAL OF THE FLUCTUATION-INDUCED TRANSPORT DURING LOW TO HIGH TRANSITIONS IN THE H-1 HELIAC PLASMA, Physical review letters, 79(14), 1997, pp. 2690-2693
Studies of turbulent transport in the H-1 heliac plasmas yield direct
evidence of the reversal of the fluctuation-driven particle flux acros
s the transition from low to high confinement mode. New types of trans
itions are characterized by significant fluctuation levels in the high
confinement mode. The fluctuation-driven particle flux in the plasma
core changes from outward to inward flow across this transition; this
is accompanied by a peaking of the density profile and an increase in
central ion temperature.