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Release : 1992
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Kind : eBook
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Book Synopsis The Effects of Plasma Deformability on the Feedback Stabilization of Axisymmetric Modes in Tokamak Plasmas by :

Download or read book The Effects of Plasma Deformability on the Feedback Stabilization of Axisymmetric Modes in Tokamak Plasmas written by . This book was released on 1992. Available in PDF, EPUB and Kindle. Book excerpt: The effects of plasma deformability on the feedback stabilization of axisymmetric modes of tokamak plasmas are studied. It is seen that plasmas with strongly shaped cross sections have unstable motion different from a rigid shift. Furthermore, the placement of passive conductors is shown to modify the non-rigid components of the eigenfunction in a way that reduces the stabilizing eddy currents in these conductors. Passive feedback results using several equilibria of varying shape are presented. The eigenfunction is also modified under the effects of active feedback. This deformation is seen to depend strongly on the position of the flux loops which are used to determine plasma vertical position for the active feedback system. The variations of these non-rigid components of the eigenfunction always serve to reduce the stabilizing effect of the active feedback system by reducing the measurable poloidal flux at the flux-loop locations. Active feedback results are presented for the PBX-M tokamak configuration.