Basics - it's a "spherical"-type tokamak. https://en.wikipedia.org/wiki/Spherical_tokamak https://en.wikipedia.org/wiki/Spherical_tokamak Longer bit - it's al

Basics - it's a "spherical"-type tokamak. https://en.wikipedia.org/wiki/Spherical_tokamak https://en.wikipedia.org/wiki/Spherical_tokamak Longer bit - it's also uses a different cross-section shape for the confined plasma. I'm not a physicist, but "negative triangularity" seems to have been discussed in research papers for 4+ decades. Good bet that it's the usual "there are advantages and disadvantages to using this..." situation.