Abstract
Beam steering technique using aperture displacement was applied to produce uniform beam distributions for testing high heat flux components. Only the apertures of a suppression grid of the JT-60 ion source were programmatically displaced with respect to those of the other three grids. Flat heat flux distributions with a uniformity within ±5% were experimentally obtained over an area of 10 cm ×10 cm at a position 4 m from the ion source. The peak heat flux ranges from 3 to 60 MW/m2 with the beam energies of 30–70 keV.
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