Equilibrium and fluctuation analysis for ZTH electrical diagnostics

Some of the rationale behind the electrical diagnostics proposed for the Los Alamos Confinement Physics Research Facility, ZTH, is discussed. The axisymmetric equilibrium measurements consist of a poloidal flux array and a toroidally averaged poloidal field array. The equilibrium quantities of interest, for example, the radial magnetic field causing displacement of the outer plasma magnetic surface, are obtained from the measurements by linear combination with constant coefficients. Some possible objectives for the nonaxisymmetric field measurements are discussed. 7 refs., 6 figs.