Scaling of Rotation and Momentum Confinement in JET Plasmas

Rotation is believed to play a role in MHD stabilisation and turbulence suppression, thus affecting tokamak performance. This justifies studying momentum transport and its scaling with plasma parameters. A 600-entry database has been built at Joint European Torus (JET), aiming at identifying broad trends in rotation behaviour across plasma scenarios and revealing its possible influence on plasma confinement. Deviations from the trends may provide further insight in the physics that affect rotation. The toroidal plasma velocity is assumed to be that of the carbon ions measured by Charge Exchange spectroscopy. The torque delivered by Neutral Beam Injection (NBI) is the only rotation source considered in this paper.
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EFDC080311 156.42 Kb