Comment by orwin
5 days ago
The reason Iter is so big is not to achieve controlled fusion, but to be able to capture the fusion energy output. I'm not doubting their ability to reach the self-sustaining plasma, I'm doubtful about their ability to capture energy from it though.
ITER is as big as it is because it would not achieve the targeted Q with the given magnet technology if it were smaller. This has nothing to do with capturing energy.