Henkel, M., Li, Y., Liang, Y., Drews, P., Knieps, A., Killer, C., Nicolai, D., Höschen, D., Langenberg, A., Pablant, N., Satheeswaran, G., Liu, S., Grulke, O., Jakubowski, M., Brezinsek, S., Neubauer, O., Schweer, B., Cai, J., & W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society (2019). Retarding field analyzer for the Wendelstein 7-X plasma boundary. Poster presented at 3rd European Conference on Plasma Diagnostics (ECPD 2019), Lisbon.