Abstract
New transport experiments on JET indicate that ion stiffness mitigation
in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102, 175002 (2009)]
results from the combined effect of high rotational shear and low
magnetic shear. The observations have important implications for the
understanding of improved ion core confinement in advanced tokamak
scenarios. Simulations using quasilinear fluid and gyrofluid models show
features of stiffness mitigation, while nonlinear gyrokinetic
simulations do not. The JET experiments indicate that advanced tokamak
scenarios in future devices will require sufficient rotational shear and
the capability of q profile manipulation.
Original language | English |
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Article number | 135004 |
Number of pages | 5 |
Journal | Physical Review Letters |
Volume | 107 |
Issue number | 13 |
DOIs | |
Publication status | Published - 22 Sept 2011 |
MoE publication type | Not Eligible |