Eddy currents in the RFX shell after short-circuiting one poloidal and one equatorial gap

The RFX machine stabilizing shell was originally provided with two toroidal insulating gaps and with two poloidal gaps. After short-circuiting one equatorial gap and one poloidal gap, the current distribution through the short-circuited gaps and the distribution of the radial magnetic field along the gaps have been measured during plasma pulses. The experimental data, which give a direct measurement of the shell reaction to the plasma magnetic perturbations, have been analysed and compared with the results of the analytical model of the shell.