Heat to electricity conversion ratio with a realistic Tokamak design will have 30% efficiency at best, accounting for other losses will require Q at least 5. Bu

Heat to electricity conversion ratio with a realistic Tokamak design will have 30% efficiency at best, accounting for other losses will require Q at least 5. But even that may be too low so to play safe the latest Tokamaks target at least 10 or more. But Helion hopes that with their design where the theoretical efficiency of electricity generation is 100%, they do not need such high Q allowing one to be excited about Q > 1. Their models predicts Q around 5. The problem is the model uncertainty. If the real Q will be just 2, I very much doubt that they can limit the total losses below 50%. But even if they can get net gain in power per pulse, they are too optimistic about neutron flux and its consequences. Again, model uncertainty is big. So overall there is very little room for unexpected in their design so I am very skeptical based just on that alone.