Hello all, 1) In tokamak, since torodial magnetic field is present everywhere, how come plasma is confined without touching the walls? Is the magnetic field stronger inside (I suppose it should be radially uniform) or is it the doing of position control coils/cusps? 2) If there are two arc shaped coils close to each other creating magnetic fields in the same direction, and a large torodial coil containing them which also creates magnetic field in the same direction but in much higher magnitude, is the plasma confined in the torodial field or does it escape to weaker field between the two little coils? If yes, does increasing the magnitude of torodial field or decreasing those of smaller coils limit the amount of loss? Thank you.