C-2U

C-2U was an upgrade of the C-2 experiment. The neutral beam input power was upgraded from ~4MW (20keV Hydrogen) to 10+MW (15keV Hydrogen) and the injection angle was tilted to improve neutral beam to FRC coupling and reduce shine-through losses. Additionally, the edge-biasing capability inside each end-diverter was improved.
The key accomplishment of C-2U was FRC stability limited only by hardware and stored energy (eg. neutral beam pulse duration and current sourcing capability of end guns). C-2U was shut down in 2015 to be upgraded again into C-2W