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Abstract

The problem of modelling the self-consistent interaction of an energetic particle ensemble with a wave spectrum specific to magnetically confined plasmas in a torus is discussed. Particle motion in a magnetic field coordinate system, whose surfaces are perturbed by a spectrum of finite amplitude magnetohydrodynamical (MHD) waves, is described using a Hamiltonian formulation. The model is validated using large aspect-ratio asymptotic limits as well as through a comparison with other numerical work. A consideration of the kinetic toroidal Alfvén eigenmode instability driven by fusion born alpha-particles in a D-T JET plasma illustrates a use of the code and demonstrates nonlinear saturation of the instability, together with the resultant redistribution of particles both in energy and across the plasma cross-section.

Additional information

Authors: PINCHES S D ET AL, AEA Fusion, Culham Laboratory, Abingdon, Oxon (GB)
Bibliographic Reference: Report: EN (1998) 37pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon, OX14 3DB (GB)
Record Number: 199811408 / Last updated on: 1998-11-10
Category: PUBLICATION
Original language: en
Available languages: en