Internal transport barrier on q=3 surface and poloidal plasma spin up in JT-60U high- discharges
Y Koide, M Kikuchi, M Mori, S Tsuji, S Ishida… - Physical review …, 1994 - APS
Y Koide, M Kikuchi, M Mori, S Tsuji, S Ishida, N Asakura, Y Kamada, T Nishitani, Y Kawano…
Physical review letters, 1994•APSSpontaneous formation of an internal transport barrier was observed associated with
improved confinement in the high-β p discharges in the JT-60U tokamak. The radial location
of the transport barrier was found to be on the q= 3 surface. A fast magnetohydrodynamic
event localized at the transport barrier triggered the subsequent formation of an edge
transport barrier that resulted in the further confinement improvement. In these discharges, a
high poloidal rotation velocity that significantly exceeded the prediction of the present …
improved confinement in the high-β p discharges in the JT-60U tokamak. The radial location
of the transport barrier was found to be on the q= 3 surface. A fast magnetohydrodynamic
event localized at the transport barrier triggered the subsequent formation of an edge
transport barrier that resulted in the further confinement improvement. In these discharges, a
high poloidal rotation velocity that significantly exceeded the prediction of the present …
Abstract
Spontaneous formation of an internal transport barrier was observed associated with improved confinement in the high-β p discharges in the JT-60U tokamak. The radial location of the transport barrier was found to be on the q= 3 surface. A fast magnetohydrodynamic event localized at the transport barrier triggered the subsequent formation of an edge transport barrier that resulted in the further confinement improvement. In these discharges, a high poloidal rotation velocity that significantly exceeded the prediction of the present neoclassical theory was also observed at r/a= 0.8.
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