1. V.B. Kutner, private communication
2. The production of ions of solids from the PIG source with an additional anode
3. D. Hitz, G. Melin, M. Pontonnier, T.K. Nguyen, Proc. 11th Int. Workshop on ECR Ion Sources, Groningen, 1993, KVI-Report 996, p. 91
4. E. Badura et al., States report of the therapy project, GSI Sci. Report 1996, GSI 97–1, 1997, p. 145
5. K. Tinschert, J. Bossler, R. Lang, S. Schennach, H. Schulte, P. Spädtke, Operation of caprice ECR ion sources for metal ion production at the GSI accelerator facilities, in: Proc. 13th Int. Workshop on ECR Ion Sources, College Station, TX, 1997, p. 172