Magnetoacoustic response of a plasma for determining magnetic field profiles

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Abstract
A theoretical study was done to determine the plasma response to driven magnetoacoustic oscillations. The theoretical model includes a one-dimensional, linear MHD description of a diffuse (or screw) reversed-field pinch plasma, in cylindrical geometry, and the m=0, k=0 mode only. The linearized theory was applied to an experimental diffuse RFP profile as well as some analytical profiles. The results indicate that the magnetoacoustic resonances show a sensitivity to the field profiles as needed for the method to be viable.