Reply To: General Fusion Inc

[Breakable]

There is no 90% efficiency requirement. Some of the . This is the energy flow diagram:
http://fusionenergyleague.org/assets/device/lpp/fofu_flow.jpg

Efficiencies are 81% X-Rays and 80% ION, which should be reachable considering it is high energy direct conversion. For example transformers can convert energy with 98% efficiency, but X-Ray to DC (or AC) technology still needs to be developed.
Thermal is counted as a loss. If Thermal is used as energy source it might reduce efficiency required for other methods.
If fusion output is greater due to some pleasant surprise or maybe some clever designs that are thought out during engineering it might be easier to build a production level Focus Fusion reactor.