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@inproceedings{weih:srf2021-wepcav007, author = {S. Weih and M. Arnold and M. Dutine and J. Enders and R. Grewe and L.E. Jürgensen and N. Pietralla and F. Schließmann and M. Steinhorst}, % author = {S. Weih and M. Arnold and M. Dutine and J. Enders and R. Grewe and L.E. Jürgensen and others}, % author = {S. Weih and others}, title = {{Status and First Tests of the Reduced-Beta Capture Cavity for the S-DALINAC}}, booktitle = {Proc. SRF'21}, % booktitle = {Proc. 20th International Conference on RF Superconductivity (SRF'21)}, pages = {597--599}, eid = {WEPCAV007}, language = {english}, keywords = {cavity, linac, electron, SRF, operation}, venue = {East Lansing, MI, USA}, series = {International Conference on RF Superconductivity}, number = {20}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {10}, year = {2022}, issn = {2673-5504}, isbn = {978-3-95450-233-2}, doi = {10.18429/JACoW-SRF2021-WEPCAV007}, url = {https://jacow.org/srf2021/papers/wepcav007.pdf}, abstract = {{The superconducting part of the injector section of the superconducting Darmstadt electron linear accelerator (S-DALINAC) [1] consisted of one five-cell capture cavity and two 20-cell cavities at 3 GHz resonance frequency. All of them were geometrically adapted to electron velocities with a beta of 1, while the thermionic gun provides electrons with a beta of 0.74. This mismatch resulted in an insufficient capture process for optimum beam quality. For this reason, a new six-cell capture cavity with a beta of 0.86 has been designed and built. Field flatness tuning, a test in the vertical bath cryostat, and a UHV furnace treatment have been carried out in-house to finalize the cavity processing. The cryostat module was adapted to house the new cavity, which has been recently installed. Following the module assembly, a first RF test run was conducted at the S-DALINAC. We report on these latest advancements towards the implementation of the injector upgrade.}}, }