Also interesting is the Wendelstein 7-X experiment, where they build a stellarator with a unique geometry, compared to the tokamak reactors.
Stellarators have traditionally lagged tokamaks in terms of Lawson criterion performance, but they've also been less funded because tokamaks have performance advantages. Stellarators are steady state and don't risk the same number of plasma instabilities. Germany is so confident that it's the right approach that they built the largest magnetic confinement device ever to test optimizing for quasi-omnigineity. Stellarators in general are becoming closer to the mainstream approach and given another 5 or 10 years you'll likely hear about them as much as tokamaks (at least in terms of non ITER research).
What are the numbers if you know, of the speed or rate at which plasma can destabilize?
https://www.energy.gov/science/fes/articles/zero-tolerance-t...
I attended a presentation today that, at one point, showed toroidal flow rate over radius in a 1m major radius device. It ranged from 30 to 100 km/s. There are many effects operating at different timescales. Turbulence is among the shorter timescales, making it difficult to simulate and why it is only now the current focus of many researchers.