As far as I am presently aware, a Farnsworth Fusor has not produced multiple plasma layers.
>> but not useful for a sustained fusion reaction.
The plasma in Safire meets the definition of "sustained fusion reaction", but whether this particular sustained fusion reaction is useful or not is a legitimate bigger question.
Perhaps I am biased because, most of my experience with plasma chambers has been involved in physical presence in laboratory settings.
>> I did my masters in Tokamak simulation
I think "simulation" is the key difference between what you did and those who are doing real laboratory work. Tesla lamented that too much in theoretical mathematics was being done in place of lab work.
I am honestly very disappointed that the essential characteristics between a Safire type 2 chamber and a Farnsworth Fusor are so clear to me, yet someone who has a "masters" (implies master degree) seems to struggle to spot the differences quickly.
The guys from the LLNL team were keen on immediately recognizing the differences, so no need to lose faith in humanity or anything here, but still, do they just give out masters degrees like candy now..
This just shows that you have no idea what you're talking about. Not only does Tesla predate the whole field of computational physics, but computational physics is distinct from both theoretical mathematics and lab work.
And I asked a simple question-- how is a SAFIRE constructed or operated? Still no answer!