Modification of MHD activity by lower hybrid current drive
The effect of magnetic islands on the propagation of lower hybrid waves is analytically investigated for a model slab equilibrium with a single helicity perturbation corresponding to an m=1 or m=2 island. From the variation of k(parallel) inside the island the parallel current is estimated with the same pitch as the original perturbation. The effect of such a current on the nonlinear evolution of an m=2 island corresponds to a destabilisation of the mode if the RF driven current is in the same direction as the global parallel current. A comparison with numerical solutions of the problem using a toroidal ray trajectory code is also presented.
Bibliographic Reference: Report: RT/FUS/88/27 EN (1988)
Availability: Available from Servizio Studi e Documentazione - ENEA, Centro Ricerche Energia Frascati, C.P. 65 - 00044 Frascati, Roma (IT)
Record Number: 199010507 / Last updated on: 1994-12-01
Original language: en
Available languages: en