Neumann, A.; Alberdi, B.; Birke, T.; Brookes, E.; Dube, J.; Echevarria, P.; Eichel, D.; Ergenlik, E.; Fleischhauer, R.; Frahm, A.; Heugel, A.; Hoffmann, H.; Huck, H.; Janke, K.; Kamps, T.; Klemz, G.; Knobloch, J.; Kolbe, J.; Kühn, J.; Lederer, S.; Mistry, S.; Ohm, N.; Pflocksch, F.; Plötz, H.; Rehm, G.; Rotterdam, S.; Schappeit, O.; Schuster, M.; Stein, H.; Ushakov, A.; Ullrich, J.; Völker, J.; Wang, C.; Galdi, A.; Will, I.: First beam commissioning of the bERLinPro superconducting radio-frequency (SRF) photoelectron gun. In: Lin Bian (IHEP) ... [Ed.] : Proceedings of the 22nd International Conference on RF Superconductivity : SRF2025 : Tokyo, RIKEN Nishina Center in Wako, Japan from 21–26 September, 2025Geneve: JACoW, 2025. - ISBN 978-3-95450-256-1, p. THB06C/598-603
Open Access Version
Abstract:
After about a decade of research, development and construction work, the bERLinPro Energy Recovery Linac project at HZB changed over into the commissioning phase and started the operation of the SRF photo-injector with the injection line of the accelerator. This system had already produced beam from a metal photo-cathode in 2018 [1] in a dedicated test environment and was assembled in the accelerator hall after a required refurbishment and repair program [2]. The 1.3 GHz SRF gun successfully generated first photoemission beam from a high quantum efficiency (QE) Na-based multi-alkali photocathode. In this contribution, the results of the first two measurement campaigns will be shown, including a review of the SRF design, the RF commissioning, the cavity performance, especially with respect to dark current, the cathode quantum efficiency and lifetime, as well as the measured beam parameters.