How a tokamak works
SPARC-class: 1.85 m major radius · 12.2 T · 8.7 MA · ~140 MW for 10 s
Run one plasma shot from start to finish. Pick a part to isolate it, cut the machine open, or ride inside the ring. Every number on the page comes from one model of the shot.
Building the machine…
Magnets on, chamber pumped down
0 MW fusion
0.0 MA · 0.1 keV (1 million K) · t = 0.0 s
Central solenoidToroidal field coil · 1 of 18PlasmaPoloidal field coilVacuum vessel
TOURThe magnets are already on at 12.2 tesla. The shot begins.
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Sources: Creely et al., “Overview of the SPARC tokamak,” Journal of Plasma Physics (2020); SPARC public design figures. Other tokamak companies tracked: Tokamak Energy.