A Comparison of Soft X-Ray Activity in High Performance JET Discharges

摘要

Using the multi-channel, soft X-ray and CATS diagnostic systems, MHD events which play a significant role in limiting the fusion yield of high performance plasmas in JET have been studied in some detail. The complexity of both ELMs and the newly observed picket fence mode have become apparent. An understanding of the nature of outer modes and bulk pressure driven kink modes has led to the implementation of operational techniques to minimise their effects on plasma performance