The poloidal magnetic field is usually made by a solenoid driving a toroidal current within this device.  A vertical field corrects for drift, while exterior coils generate a 
The poloidal magnetic field is usually made by a solenoid driving a toroidal current within this device.  A vertical field corrects for drift, while exterior coils generate a toroidal field which can be 10 Tesla.  Acting as a magnetic bottle, the fields constrain the plasma in the torodial containment area.  FTP, give the name, originally a Russian acronym, of this type of fusion reactor.
The poloidal magnetic field is usually made by a solenoid driving a toroidal current within this device.  
tokamak (do not accept "stellerator"; for the show-offs, the Russian is approximately:  toroidalnaya kamera ee magnitnaya katushka)