STABILIZATION OF AN M=1 FLUTE MODE IN AN AXISYMMETRICAL OPEN CONFINEMENT SYSTEM WITH A MAGNETIC RIPPLE

The stabilization of a beta much less than 1 plasma with respect to a global flute mode m = 1 (the rigid mode: plasma being displaced as a w hole) is shown to be possible if the plasma confined in an axisymmetri c confinement system with a slightly rippled magnetic field has an ani sotropic component. The necessary conditions for the magnetic-field ri pple magnitude and the optimal location of rings formed by an anisotro pic plasma are obtained. An example of a stability-ensuring magnetic-f ield configuration is presented.