Avoiding Tokamak disruptions by applying static magnetic fields that align locked modes with stabilizing wave-driven currents
arXiv:1510.08932 · doi:10.1103/PhysRevLett.115.175002
Abstract
Non-rotating (`locked') magnetic islands often lead to complete losses of confinement in tokamak plasmas, called major disruptions. Here locked islands were suppressed for the first time, by a combination of applied three-dimensional magnetic fields and injected millimetre waves. The applied fields were used to control the phase of locking and so align the island O-point with the region where the injected waves generated non-inductive currents. This resulted in stabilization of the locked island, disruption avoidance, recovery of high confinement and high pressure, in accordance with the expected dependencies upon wave power and relative phase between O-point and driven current.
4 figures
Cited by in corpus (10)
- Suppression of Tearing Modes by RF Current Condensation
- Pulsed RF Schemes for Tearing Mode Stabilization
- Feedforward and feedback control of locked mode phase and rotation in DIII-D with application to modulated ECCD experiments
- RF current condensation in magnetic islands and associated hysteresis phenomena
- On the stabilisation of locked tearing modes in ITER and other large tokamaks
- RF current condensation in the presence of turbulent enhanced transport
- Effects of resonant magnetic perturbation on locked mode of neo-classical tearing modes
- Disruption Avoidance via RF Current Condensation in Magnetic Islands Produced by Off-Normal Events
- Two-fluid model of rf current condensation in magnetic islands
- Calculating RF current condensation with self-consistent ray-tracing