“…It is important, however, to keep this optimistic possibility in mind. The plasma size and the magnetic field are only factors of 2 to 4 less than the corresponding parameters for the prototype op timum FRM reactor, 5 and they are factors of 2 to 4 greater than the present 2XIIB experiment. If it becomes possible to run the MFTF in this longterm, sustained, field-reversed mode, then such ex periments would be an important intermediate step towards a prototype FRM ret-tor.…”