Sawtooth pacing by real-time auxiliary power control in a tokamak

In the standard scenario of tokamak plasma operation, sawtooth crashes are the main perturbations that can trigger performance-degrading, and potentially disruption-generating, neoclassical tearing modes. This Letter demonstrates sawtooth pacing by real-time control of the auxiliary power. It is shown that the sawtooth crash takes place in a reproducible manner shortly after the removal of that power, and this can be used to precisely prescribe, i.e., pace, the individual sawteeth. In combination with preemptive stabilization of the neoclassical tearing modes, sawtooth pacing provides a new sawtooth control paradigm for improved performance in burning plasmas.


Published in:
Physical Review Letters, 106, 24, 245002
Year:
2011
Publisher:
American Physical Society
Keywords:
Note:
© 2011 American Physical Society
Laboratories:
SPC
CRPP




 Record created 2011-06-15, last modified 2018-10-07

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