Non-local Heat Transport, Rotation Reversals and Up/Down Impurity Density Asymmetries in Alcator C-Mod Ohmic L-mode Plasmas
ORAL
Abstract
Several seemingly unrelated phenomena in Alcator C-Mod Ohmic L-mode plasmas are shown to be closely connected: non-local heat transport, core toroidal rotation reversals, energy confinement saturation, up/down impurity density asymmetries and turbulence changes. These phenomena all abruptly transform at a critical value of the collisionality.
*Supported by USDoE award DE-FC02-99ER54512.
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