Krause, M., Jakubowski, M., Mohr, S., Fellinger, J., Vogt, N., Kremeyer, T., et al. (2023). Hardening of Wendelstein 7-X infrared and H-alpha immersion tubes for experimental campaigns OP2.1 and OP2.2. Poster presented at 30th IEEE Symposium on Fusion Engineering (SOFE), Oxford.