COMPARISON OF THEORY WITH EXPERIMENT IN THE CONTEXT OF RECENT TOKAMAK ELECTRON CYCLOTRON CURRENT DRIVE RESULTS FROM WT-2
A simple analytical model of the non-Maxwellian electron velocity distribution, whose parameters are constrained by the observed plasma current and soft X-ray emission spectrum, is used in conjunction with a fully three-dimensional ray-tracing code to calculate the absorption of radiation in the electron cyclotron range of frequencies by WT-2 discharges. This gives a quantitative theoretical description of the way in which a drifting population of energetic electrons appears to dominate WT-2 current drive experiments. Calculation of the proportion of source power absorbed by the plasma helps to determine the efficiency factor of the current drive mechanism in this context. The strong dependence of current drive on extraordinary mode launch direction is given quantitative theoretical support.
Bibliographic Reference: WRITE TO THE LIBRARIAN, UKAEA, CULHAM LABORATORY, ABINGDON, OXON OX14 3DB (UK), MENTIONING REPORT CLM-P785, 1986
Record Number: 1989125078400 / Last updated on: 1987-12-01
Available languages: en