A much better description of this, as well as more accurate info on the whole thing here: https://arstechnica.com/science/2022...-by-a-tokamak/

This is a testbed device for the larger ITER tokomak, and is designed for only short periods of sustained fusion.

We'll see in 2025, when ITER is put into service to see if real sustained and > break-even fusion can be done.