The best outcome would be for the device to operate continuously without interruption.
If a problem arises halfway through, the experiment will have to be stopped for modifications and adjustments, and then preparations for a second trial can begin.
Fortunately, since nuclear fusion is not nuclear fission, the fusion reaction is quite comprehensive. There's no high radioactivity partway through, and with the isolation effect of the space casing, there's virtually no radiation outside the device, so it won't produce a large amount of unmanageable waste.
As long as the core of the device doesn't have any problems, as long as the seal is maintained, the only thing that needs to be dealt with is the insufficiently reacted raw material.
The nuclear fusion device uses deuterium-tritium fuel and carries out the 'first generation' of fusion reactions.