Presumably the lasers have produced enough energy to ionize helium generated in the target. It's quite unclear how a net energy gain will be extracted simply by

Presumably the lasers have produced enough energy to ionize helium generated in the target. It's quite unclear how a net energy gain will be extracted simply by grabbing the moving ions electrically. That sounds like a huge extra challenge on top of achieving net positive controlled fusion. There will inevitably be a lot of heat produced that has to be cooled. Generally people plan to use the coolant as the working fluid in the power cycle. If there's an innovation here it'd be cool if they put it way more up front. In any case there will still be a coolant.