[nickparker]

Can you point me to where they say the central cones are a change in their hypothetical production design?

I was under the impression it's just there for diagnostics in the sub-scale prototype.

[pfdietz]

The abandonment of the acoustic compression scheme is explained in this poster.

https://generalfusion.com/wp-content/uploads/2018/07/ICPP_20...

The move to a spherical tokamak is explained in page 9 of these slides.

https://arpa-e.energy.gov/sites/default/files/11_LABERGE.pdf

The slower compression of the non-acoustic scheme requires better confinement than the spheromak provided.

[nickparker]

Hmm yeah that does sound like a permanent change in the second link doesn't it? Too bad, I was really rooting for their plan.

[pfdietz]

The Turchi mentioned there was associated with Los Alamos, where the LINUS concept was investigated. General Fusion seems to be moving in that direction, so this slide from Turchi at Compact Fusion Systems could be of interest. It has a focus on practical engineering and cost issues that I find encouraging.

https://nucleus.iaea.org/sites/fusionportal/Shared%20Documen...