FIRST EXPERIMENTS IN JET
The paper describes results obtained from JET since June 1983, which show that this large tokamak behaves in a similar manner to smaller tokamaks, but with correspondingly improved plasma parameters. Long duration hydrogen and deuterium plasmas (> 10s) have been obtained with electron temperatures reaching > 4keV, for power dissipations < 3MW, and with confinement times up to 0.6s. Elongated plasmas (b/a in the range 1.1 - 1.7) have been achieved with plasma currents, I-p, up to 3.7MA and toroidal magnetic fields, B-T, up to 3.5 T. At the highest elongations (b/a - 1.6), loss of vertical stability occurred, as expected from previous calculations. Forces of several hundred tonnes (at I-p = 2.7MA) were transmitted to the vacuum vessel. Measured confinement times are larger than the corresponding INTOR values. The maximum achievable density is limited by disruptions. Impurity levels determine this limiting density, and the paper concludes with proposals to reduce these. In addition, progress in neutral injection and RF heating is described, as well as preparations for D-T operation.
Bibliographic Reference: 10TH INTERNATIONAL CONFERENCE ON PLASMA PHYSICS AND CONTROLLED NUCLEAR FUSION RESEARCH, LONDON (UK) SEPT. 12-19, 1984 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK), MENTIONING REPORT JET-P(84)05, 1984
Record Number: 1989123092400 / Last updated on: 1987-01-01
Available languages: en