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Abstract

The efficiency of current drive by X-mode electron cyclotron waves is calculated using the weakly relativistic resonance condition in a full Fokker-Planck treatment which includes electron - electron collisions. For suprathermal resonant electrons the values obtained are less by a factor (Z+5)/Z than those predicted by the Lorentz gas model. However this relationship is found not to hold for resonant parallel velocities less than the thermal velocity. A ray tracing code, incorporating the calculated current drive efficiencies, has been used to study the relativistic corrections for X-mode second harmonic waves injected from the low field side into a tokamak the size of DITE.

Additional information

Authors: START D F H, CULHAM LABORATORY, ABINGDON, OXON. (UK);ST. JOHN'S COLLEGE, CAMBRIDGE (UK);O'BRIEN M R, CULHAM LABORATORY, ABINGDON, OXON. (UK);ST. JOHN'S COLLEGE, CAMBRIDGE (UK);GRACE P MV CULHAM LABORATORY, ABINGDON, OXON. (UK), CULHAM LABORATORY, ABINGDON, OXON. (UK);ST. JOHN'S COLLEGE, CAMBRIDGE (UK);ST. JOHN'S COLLEGE, CAMBRIDGE (UK), CULHAM LABORATORY, ABINGDON, OXON. (UK);ST. JOHN'S COLLEGE, CAMBRIDGE (UK)
Bibliographic Reference: WRITE TO THE LIBRARIAN, UKAEA, CULHAM LABORATORY, ABINGDON, OXON. OX14 3DB (UK), MENTIONING REPORT CLM-P 693, 1983
Record Number: 1989122017900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en