Modal Feedback Stabilization of Hydromagnetic Equilibria,
Abstract
The problem of feedback stabilization of MHD instabilities is studied. Results are obtained for a cylindrical perfectly conducting plasma column immersed in a static axial magnetic field. Based on the linearized MHD equations, it is shown that local stabilization (including the interchange modes) can be achieved by a feedback control in the form of a magnetic field perturbation acting at the fluid boundary and depending linearly on the amplitudes of the unstable modes only. The control can be implemented by a finite number (a minimum of two in order to control all the unstable modes) of helical current-carrying conducting straps. The interchange modes can be stabilized by shielding each strap such that its field is effective on a portion of the plasma surface only. The limitations of the results are also discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1972
- Accession Number
- AD0753102
Entities
People
- G. Rodriquez
- Paul Keng Chieh Wang
Organizations
- University of California, Los Angeles