TY - JOUR
T1 - Sawtooth pacing by real-time auxiliary power control in a tokamak plasma
AU - Goodman, T.P.
AU - Felici, F.
AU - Sauter, O.
AU - Graves, J.P.
PY - 2011
Y1 - 2011
N2 - 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. © 2011 American Physical Society. SP - 245002
AB - 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. © 2011 American Physical Society. SP - 245002
U2 - 10.1103/PhysRevLett.106.245002
DO - 10.1103/PhysRevLett.106.245002
M3 - Article
C2 - 21770577
VL - 106
SP - 1
EP - 4
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 24
M1 - 245002
ER -