Why spherical stellarator is better for controlled nuclear fusion than other magnetic confinement devices?
The question is not correct because no one can say for sure if one specific fusion approach is absolutely better than the others, especially while there is no yet a clear path to a fusion reactor. How the first fusion reactor will look like is fully unpredictable at this time. Nevertheless, there are many possible fusion configurations under discussion in the literature, starting probably since beginning of 1950s, and many different experimental machines were constructed to study fusion grade plasmas and make progress in reaching higher plasma temperature, higher plasma density, and longer plasma confinement time, which would allow the plasma ignition (self-sustained fusion reaction). The spherical stellarator (http://www.highfactor.com/ss) has a number of advantages, according to its author, but it’s still not a well-investigated approach, so there are many unresolved questions. Based on that website, the following information can be extracted. Spherical stellarator is a concept of a
