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The dynamics of the core and outer micro-turbulence during the low–intermediate–high (L–I–H) confinement transition have been investigated simultaneously by a tangential CO2 laser collective scattering system on EAST. It is found that, the intensity of micro-turbulence decreases most strongly near the outer region of the plasma, with less dramatic reduction deeper into the plasma. During the transition,...
The dynamics of the turbulent fluctuations during the H–L back transition have been studied on EAST by a CO2 laser collective scattering system. The limit-cycle oscillation (LCO) regime has been frequently observed during the H–L back transition, and the oscillation frequency increases gradually as the back transition is approached. In the LCO regime, both the core and outer fluctuation level have...
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