Start-up and Ramp-up of the PLT Tokamak by Lower Hybrid Waves
In a tokamak fusion reactor, as in all tokamaks, the confinement of the reacting plasma will be provided by two orthogonal magnetic fields, the toroidal and poloidal fields. The toroidal field is generated by a system of coils external to the plasma. Whereas in most present day tokamaks these coils are resistive, in a reactor they will presumably be superconducting. For present devices, the duration of the toroidal field, at least at the highest fields these machines can produce, is limited by coil heating; for the reactor, on the other hand, the field will be on for unlimited duration. Because of the pulsed nature of the toroidal field, among other reasons, present tokamaks are pulsed devices, and thus rapid start-up is a necessary part of their operation.
KeywordsCurrent Drive Ohmic Heating Vacuum Vessel Toroidal Field Poloidal Field
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