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Results from the JET Mark I divertor are presented which show that addition of extrinsic impurities is essential for obtaining high radiated power fractions and detachment at high input power. Combined deuterium and impurity puffing has been shown to create a regime with benign high frequency type III ELMs which would be acceptable to ITER. The paper covers the comparison of carbon and beryllium targets, the effect of geometry, the need for extrinsic impurities and the influence of these impurities on plasma purity and confinement.

Additional information

Authors: JET, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(95)40 EN (1995) 13 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199511328 / Last updated on: 1995-10-31
Original language: en
Available languages: en