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A new series of D-3He fusion yield experiments has been performed in JET using ICRF heating to generate a high energy 3He tail reacting with a background deuterium plasma. Using the recently installed antennae with beryllium screens, RF power reaching 15 MW could be coupled to the plasma at the fundamental cyclotron resonance of 3He near the magnetic axis. Best results were obtained with 3.5 MA discharges in the double null configuration, with high recycling on outboard limiters in order to stay in L-mode and control the plasma density and purity. A record fusion power level of 140 kW was obtained, corresponding to a reaction rate of 4.6 x 1.0 E16 reactions/s. The amplification factor reached a maximum of 1.25% at 10 MW. The previous best results were 100 kW and 1%. Time resolved measurements show a correlation between fusion power and energy stored in the fast 3He ions, in agreement with calculations based on classical slowing down of the 3He ions driven by ICRH to an average energy in the MeV range.

Additional information

Authors: JACQUINOT J, JET Joint Undertaking, Abingdon, Oxon. (GB);SADLER G, JET Joint Undertaking, Abingdon, Oxon. (GB);JET TEAM, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(91)07 EN (1991) 37 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199111300 / Last updated on: 1994-12-02
Original language: en
Available languages: en