H-1NF

H-1NF is the Australian Plasma Fusion Research Facility. H-1NF is the Australian Plasma Fusion Research Facility. The H-1 flexible Heliac is a three field-period helical axis stellarator located in the ANU Research School of Physics and Engineering at Canberra, Australia. 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.