U. Fantz

Evaluation of beam properties using a checkerboard masking configuration at the NNBI test stand BATMAN Upgrade

Negative ion based neutral beam injection (NBI) systems will be used for heating and current drive at the ITER tokamak and require stringent beam quality. Including a beamlet core divergence of less than 7 mrad and high uniformity across individual beamlets (better than 90%), at...