START Reached ~30% in Average Toroidal b in Well-Confined NBI Plasma (Gates, Sykes et al.)

Plasma current = 0.25 MA

NBI power ? 0.4 MW

@ 30 kV

ORNL ATF NB system

(courtesy of START Team)

• Central b > 60% and average toroidal b ~ 30%

• Increased operating space and improved plasma

• Recent Upgrades: NBI power ~ 1 MW; field duration ~ 30 ms

• MAST will upgrade the NBI systems from ORNL

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