Dynamic modelling of tearing mode stabilization by RF current drive
The theory of tearing mode stabilization in toroidal plasmas by radio-frequency (RF)-driven currents that are modulated in phase with the island rotation is investigated. A time scale analysis of the phenomena involved indicates that transient effects, such as finite time response of the driven currents, island rotation during the power pulses, and the inductive response of the plasma, are intrinsically important. A dynamic model of such effects is developed, based on a 3-dimensional Fokker-Planck code coupled to both the electric field diffusion and the island evolution equations. Extensive applications to both electron cyclotron and lower hybrid current drive in ITER are presented.
Bibliographic Reference: Report: EUR-CEA-FC-1619 EN (1998) 57pp.
Availability: Available from Association Euratom-CEA, CEN Cadarache, 13108 Saint-Paul-lez-Durance (FR)
Record Number: 199811004 / Last updated on: 1998-09-15
Original language: en
Available languages: en