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The objective of JET has been to obtain and study a plasma under conditions and of dimensions approaching those needed in a thermonuclear reactor. The present status of JET is described and its technical achievements are listed, both for transient and quasi steady-state conditions. The second values of neutron yield, pressure and total energy obtained in a non-steady-state situation might prove useful to reach ignition, but cannot be relied upon for working quasi-continuously at full fusion power in a reactor. Future work will consider control of current density profile, impurities and disruptions as well as methods of increasing central plasma temperature and the plasma current. It is also planned to introduce tritium into JET in early 1992. A critical temperature gradient model, which successfully describes most JET results in terms of energy transport, has been used to predict the size of an ignition device and its conditions of operation. The next generation of tokamaks must demonstrate that an ignited and burning plasma at high power with semi-continuous operation can be realised.

Additional information

Authors: REBUT P H, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(89)60 EN (1989)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199010745 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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