Identification of the Physical Mechanism of Low-M, N=l Mode Control in JET

摘要

1. In initial experiments with the DFSS many aspects of the physics of magnetic island evolution in the presence of externally applied fields have been investigated.rn2. Operation of the control loop has been explored and phenomena such as the vacuum feedthrough and plasma response have been quantified.rn3. Analysis indicates that the control loop functioned correctly, but that limitations in the power capability of the system prevented the system from stabilising disruption precursor modes.rn4. Simulations of the operation of the control loop using a numerical model have yielded insight into the physics of the control problem.