ITER's planned 60-second current ramp-down is MHD-stable if the plasma starts sufficiently hot, but significantly faster ramps excite locking 2/1 tearing modes that trigger disruptions.
Uckan and the ITER Physics Group,International Atomic Energy Agency, ITER Physics Design Guidelines: 1989, (International Atomic Energy Agency, Vienna, 1990)
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A simple model of current ramp down in the ITER tokamak
ITER's planned 60-second current ramp-down is MHD-stable if the plasma starts sufficiently hot, but significantly faster ramps excite locking 2/1 tearing modes that trigger disruptions.