Operation and performance of the JUNGFRAU photon detector during first FEL and synchrotron experiments. (12th November 2018) - Redford, S.; Andrä, M.; Barten, R.; Bergamaschi, A.; Brückner, M.; Chiriotti, S.; Dinapoli, R.; Fröjdh, E.; Greiffenberg, D.; Leonarski, F.; Lopez-Cuenca, C.; Mezza, D.; et al.