THE EFFECT OF NEUTRAL BEAM INJECTION ON WAVE PROPAGATION IN THE ION CYCLOTRON RANGE OF FREQUENCIES
For the model configurations considered here, the preliminary results indicate that the seeding of ICRF heated tokamak plasma systems with fast resonant ions leads to (i) Strong selective absorption of wave energy by the injected fast ions; (ii) Damping of the fast wave during fundamental heating of minority ion admixtures is significant even at relatively large concentrations of fast ions. (iii) For a given injection energy, and for fundamental ICRF operations, near tangential beam injection theta=O, provides optimum damping. While for heating at the second harmonic frequency, where finite Larmor radius effects are important, injection in the region of theta approximately equal pi/2 is to be preferred. Finally, for JET operations with a deuterium bulk, and either hydrogen or deuterium injection, strong damping by the fast particles is predicted.
Bibliographic Reference: 13TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA HEATING, SCHLIERSEE (GERMANY), APRIL 14-18, 1986 PP. 29-32 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK) MENTIONING REPORT JET-P(86)15, 1986
Record Number: 1989125010800 / Last updated on: 1987-01-01
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