[3] In 2022 the H-1 heliac was disassembled before being shipped to its new home in China.

The H-1 flexible Heliac is a three field-period helical axis stellarator.

Optimisation of the H-1 power supplies for low current ripple allows precise control of the ratio of secondary (helical, vertical) coil to primary (poloidal, toroidal) coil currents, resulting in a finely tunable magnetic geometry.

Slight variation in the current ratio between shots (plasma discharges) in a sequence corresponds to a high resolution parameter scan through magnetic configurations (i.e.: rotational transform profile, magnetic well).

The programmable control system allows for repetition rates of around 30 shots per hour, limited by data acquisition time and magnet cooling time.