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Abstract

In nearly four years of operation of the JET tokamak, experiments have been undertaken with input powers up to 7MW of ICRF, about 10MW of neutral beam and about 18MW during combined operation. JET results show many advances made during this period. With ohmic heating alone, good confinement (tau-E up to 0.9s), high temperatures (T-e up to 5 keV) and a fusion product <n-i tau-ET-i> = 1020m-3.s.keV have been achieved. Highly efficient ion heating has been observed (T-i>12.5+-1.5 keV) at moderate neutral beam injection levels (P-NB-<8MW) and at low average nd densities (n-i = 1-1.5x1019m-3). But with increasing additional heating, confinement is degraded and thus additional heating has little impact on the fusion product. However, a fusion product of 2x1020m- 3-.s.keV has been achieved with a magnetic separatrix configuration in JET. Experimental results are examined in terms of possible scaling laws for electron energy confinement and implications for a reactor are considered.

Additional information

Authors: REBUT P H, JET JOINT UNDERTAKING, ABINGDON (UK);LALLIA P P JET JOINT UNDERTAKING, ABINGDON (UK), JET JOINT UNDERTAKING, ABINGDON (UK)
Bibliographic Reference: WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK), MENTIONING REPORT JET-P(87)15, 1987
Record Number: 1989126025501 / Last updated on: 1989-01-01
Category: PUBLICATION
Available languages: en