Same as with almost any other reactor: Steam running through turbines. The high temperatures are important to sustain the fusion process. The goal is that it practically self sustains itself while we just continue to feed it with hydrogen.
There are fusion reactor designs (most hypothetical, but some physical) which use magnetic interactions to capture the energy as electricity. The issue is that it’s orders of magnitude more complex to do, even if it increases efficiency.
Same as with almost any other reactor: Steam running through turbines. The high temperatures are important to sustain the fusion process. The goal is that it practically self sustains itself while we just continue to feed it with hydrogen.
Why not magnets
There are fusion reactor designs (most hypothetical, but some physical) which use magnetic interactions to capture the energy as electricity. The issue is that it’s orders of magnitude more complex to do, even if it increases efficiency.
How do those work?
Nobody knows