Wimmer, C., Schiesko, L., Fantz, U., & NNBI Team, Max Planck Institute for Plasma Physics, Max Planck Society (2015). Investigation of the Boundary Layer during the Transition from Volume to Surface Dominated H- Production at the BATMAN Test Facility. Talk presented at 16th International Conference on Ion Sources (ICIS 2015). New York, NY. 2015-08-23 - 2015-08-28.