Safety of Superconducting Magnets for Fusion: Thermal and Electromagnetic Effects of Rapid TF Coil Discharge

摘要

The most rapid discharge of a TF coil caused from a discontinuity of current path, as might result from the burning of a current lead or the failure of an internal or external conductor joint. The discontinuity will cause a sudden very high voltage and arcing, not only where the discontinuity occurred, but at several other points in the system as well. The subsequent discharge of the TF coil will depend on the effective electrical resistance of the arcs. The consequences of a sudden resistive voltage drop of 20 kV (0.83 omega for a 24 kA current) have been investigated. (ERA citation 81:026686)