Sector Gap Voltages and Induced Loads Following Plasma Disruption in FED/INTOR

摘要

The rapid decay of magnetic flux associated with a plasma disruption induces voltages and currents in conducting bodies which are nearby. Recent tokamak designs utilize toroidal shells or shell segments near the plasma which are divided into sectors for assembly and maintenance purposes, but which may have electrically conducting paths toroidally in order to provide vacuum boundaries. The generation of voltage across sector gaps is a potential problem in the form of arc initiation with material damage. In addition, the induced currents interact with their own fields or fields from the TF or PF coils to generate electromagnetic loads which require consideration from the structural standpoint. The examples presented in this report were generated as part of the FED/INTOR reactor design study to illustrate the form and magnitude of these induced current effects and some of the machine characteristics which govern their behavior. (ERA citation 08:016904)