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Abstract

Dynamics of fast minority ions energized by ion cyclotron resonance and lower hybrid heating in tokamaks is investigated by cylindrical 2-dimensional Fokker-Planck and toroidal 3-dimensional Monte Carlo calculations. The power exchange between the waves and minority ions, the ensuing fast ion bootstrap current and the power deposition are calculated in the presence of fast ion radial diffusion and thermal minority ion source near the plasma edge. Both lower hybrid and ion cyclotron heating are observed to increase by increasing overlapping of the heating regimes and by radial diffusion. The fast minority ion current is found to be strongly modified by the bootstrap current generation in the cyclotron heating region. An analytical expression to describe the radiofrequency (RF) induced bootstrap current is presented.

Additional information

Authors: HEIKKINEN J A ET AL, VTT Energy, Association EURATOM-TEKES (FI);KIVINIEMI T P ET AL, Helsinki University of Technology, Department of Technical Physics (FI);SAVELIEV A ET AL, A F Ioffe Physico-Technical Institute, St Petersberg (SU);ERIKSSON L-G, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(96)34 EN (1996) 22pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
Record Number: 199611500 / Last updated on: 1997-01-16
Category: PUBLICATION
Original language: en
Available languages: en