#How good is the rfx 150 final skin

in case of any fault, currents in the coils can rise beyond safety limits at a very high rate, leading to extremely critical conditions for the machine integrity the electrodynamic forces acting on the OH winding are large and comparable with those in tokamaks

#How good is the rfx 150 final skin

the very fast rate required for current rise may produce remarkable skin effects within the OH conductors, so that large cross-section conductors have to be avoided very high voltage across the OH and EF winding terminals, giving rise to substantial insulation problems large flux and energy to be inductively stored The main consequences for the RFX PF magnet systems are as follows: The RFP requires a high toroidal loop voltage during fast current rise and a relatively high toroidal loop voltage during the flat top. Another peculiarity of the TF winding is that it is required to operate with a time-varying current and at high voltage levels.ДЇrom these points of view, the design of RFP TF windings presents much less technological problems than a tokamak of similar size.

Owing to the local stability properties, the TF coils have to be located as close as possible to the plasma but, at the same time, the magnetic field ripple from TF coils (as well as any kinds of stray fields) must be kept to a minimum. The two induction field components have similar amplitudes, so that the toroidal component required in a RFP is about one order of magnitude lower than that in a tokamak with equal plasma current and aspect ratio.

As in tokamaks, the former is provided by the toroidal and poloidal components for the the ohmic heating (OH) winding and the equilibrium field (EF) winding. The reversed field pinch (RFP) magnetic confinement requires both toroidal and poloidal components for the magnetic field induction.