Evaluation of EC stray radiation in ITER and its implication for diagnostics

Abstract

During normal ITER operation, Electron Cyclotron (EC) heating and current-drive system will generate stray microwave radiations. Three cases have been identified with their associated load localisation and power. The effect on first-wall diagnostics, mineral insulated cables and vacuum windows are described. The most affected diagnostic port plugs are the #11, #12 and #17. In these areas, mitigation strategies will have to be found to protect the vacuum windows from the cross-polarised stray radiation.