Progress toward Triggering ELMs with Injected Li Granules on NSTX

Efforts to trigger/pace low amplitude ELMs at high frequencies using injected Lithium granules have been undertaken at PPPL. A dropper/impeller injection technology is being developed and is scheduled for installation on NSTX during the 2011-12 run campaign. Using this technology, millimeter-scale spherical Lithium granules can potentially be injected at ``pacing'' frequencies up to several hundred Hz and injection speeds approaching 100m/s.