EROSION AND REDEPOSITION OF METALS AND CARBON ON THE JET LIMITERS
A more detailed analysis of the metal distribution found on the JET limiters from three different operational periods indicates that the final distribution is largely affected by erosion and deposition processes caused by the plasma. Contamination of the limiter surface is probably due to tokamak operational processes as GDC and PDC as well as transfer of metal from the walls to the limiter in disruptive discharges. For a complete description the results suggest that the limiter surface conditions (temperature) and the positioning of the limiter in the torus relative to other structures (r.f. antenna) have to be taken into account. A theoretical model describing the 1983 limiter erosion and deposition processes gives results which are qualitatively in agreement with experimental observations during discharges.
Bibliographic Reference: 13TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA HEATING, SCHLIERSEE (GERMANY), APRIL 14-18, 1986 PP. 105-108 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK) MENTIONING REPORT JET-P(86)15, 1986
Record Number: 1989125011700 / Last updated on: 1987-01-01
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