Community Research and Development Information Service - CORDIS

Abstract

The approach to sawteeth has been transformed by a combination of the improved ability to make precise measurements of the magnetic field and the new results from JET. This has led to developments in stability theory and to new sawtooth models. However there are several fundamental problems, above all the (apparent?) discrepancy between the evidence from different tokamaks on the central value of q and the problem of the rapid sawtooth trigger. With regard to sawtooth control (which might not require an understanding of sawteeth!), the prospects are good. Active stabilisation leading to an improved plasma has been achieved on ASDEX by lower hybrid current drive, and inadvertent'' stabilisation has been found on JET with the application of additional heating.

Additional information

Authors: WESSON J A JET JOINT UNDERTAKING, ABINGDON, UK, JET JOINT UNDERTAKING, ABINGDON, UK
Bibliographic Reference: REPORT JET-P(87)14, 1987, AVAILABILITY: JET, ABINGDON, UK
Record Number: 1989126080600 / Last updated on: 1989-05-01
Category: PUBLICATION
Available languages: en