Current Status of the KIT Coaxial-Cavity Long-Pulse Gyrotron and its Key Components - Ruess, S.; Avramidis, K. A.; Gantenbein, G.; Ioannidis, Z.; Illy, S.; Kalaria, P.C.; Kobarg, T.; Pagonakis, I. G.; Ruess, T.; Rzesnicki, T.; Thumm, M.; Weggen, J.; et al. (EPJ Web of Conferences, 2018)