The current will then be discharged to initiate a plasma pulse. From this moment—until the end of the cycle—the six central solenoid modules will act independently, each following an individual current profile. In certain modules, current will drop to zero directly, before being ramped up again in the reverse direction; others will decrease more progressively; still others will change current directions twice. Only the two central modules, CS1U and CS1L, act as a pair. Toward the end of the cycle, maximum current of 46 kA is reached in some modules.
The central solenoid modules will be magnetized together, and then discharged according to individual current profiles to initiate and sustain the ITER plasma (shown in red).