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Abstract

Earlier results from neutral beam heated Tokamaks have indicated the importance of plasma boundary conditions on transport. In DITE we have deliberately altered these conditions by changing the torus from State 1 (titanium limiters, titanium gettering) to State 2 (carbon limiters, no gettering) and studied the parametric dependence of plasma current I, limiter radius a-L, density and neutral injection power on transport. To vary a-L we have used a movable heated graphite limiter. In the recent (State 2) discharges we find an increased dependence of confinement on density (tau-E varies as n**4/5) compared with State 1 behaviour, results similar to ISX "Z mode' behaviour. However, tau-E was independent of the limiter radius at constant current indicating a departure from Intor parametric scaling.

Additional information

Authors: COTTRELL G A, CULHAM LABORATORY, ABINGDON, OXON (UK);LOMAS P J, CULHAM LABORATORY, ABINGDON, OXON (UK);MAY A B, CULHAM LABORATORY, ABINGDON, OXON (UK);FIELDING S J, CULHAM LABORATORY, ABINGDON, OXON (UK);JOHNSON P C CULHAM LABORATORY, ABINGDON, OXON (UK), CULHAM LABORATORY, ABINGDON, OXON (UK)
Bibliographic Reference: 4TH INTERNATIONAL SYMPOSIUM ON HEATING IN TOROIDAL PLASMAS, ROMA (ITALY), MARCH 21-28, 1984 VOL. I, PP. 105- 110 1478 P., VOL. I AND VOL. II, 1984 WRITE TO MONOTYPIA FRANCHI, ST. LUCIA + VIALE UMBRIA NO. 28, 06012 CITTA DI CASTELLO, PERUGIA (ITALY), USD 6
Record Number: 1989124028100 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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