On magnetic islands and drift surfaces in Helias configurations
This work is devoted to the study of magnetic islands and resonances of drift surfaces which can take place in the magnetic field of a Helias configuration and which affect the particle confinement properties. It is shown that due to internal magnetic field perturbations large islands occur in the magnetic configuration and, in particular, in the drift surfaces. These internal perturbations may originate from the finite beta effect or - in the time dependent case - from magnetohydrodynamic (MHD) instabilities in the plasma. In the present analysis the amplitude of these perturbations is considered as an arbitrary parameter. The paper summarizes the results of numerical computations with time independent magnetic perturbations leading to island formation in magnetic surfaces and drift surfaces of alpha particles.
Bibliographic Reference: Report: IPP 2/340 EN (1998) 21pp.
Availability: Available from the Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München (DE)
Record Number: 199810847 / Last updated on: 1998-07-20
Original language: en
Available languages: en