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@inproceedings{dziuba:linac2022-mopoge21, author = {F.D. Dziuba and K. Aulenbacher and W.A. Barth and M. Basten and C. Burandt and T. Conrad and V. Gettmann and T. Kürzeder and S. Lauber and J. List and M. Miski-Oglu and H. Podlech and M. Schwarz and S. Yaramyshev}, % author = {F.D. Dziuba and K. Aulenbacher and W.A. Barth and M. Basten and C. Burandt and T. Conrad and others}, % author = {F.D. Dziuba and others}, title = {{A Superconducting 217 MHz Single Spoke Cavity for the Helmholtz Linear Accelerator at GSI}}, booktitle = {Proc. LINAC'22}, % booktitle = {Proc. 31st International Linear Accelerator Conference (LINAC'22)}, pages = {200--203}, eid = {MOPOGE21}, language = {english}, keywords = {cavity, simulation, linac, resonance, SRF}, venue = {Liverpool, UK}, series = {International Linear Accelerator Conference}, number = {31}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {09}, year = {2022}, issn = {2226-0366}, isbn = {978-3-95450-215-8}, doi = {10.18429/JACoW-LINAC2022-MOPOGE21}, url = {https://jacow.org/linac2022/papers/mopoge21.pdf}, abstract = {{A new superconducting (SC) continuous wave (CW) linac, providing high efficient heavy ion acceleration above the coulomb barrier, is going to be built at GSI to fulfill the upcoming demands in the research field of super heavy element (SHE) synthesis. The so called HELIAC (HElmholtz LInear ACcelerator) delivers ion beams in the energy range of 3.5 MeV/u and 7.3 MeV/u with a mass to charge ratio (A/z) of up to 6. Superconducting multi-gap crossbar-H-mode (CH) cavities with a resonance frequency of 217 MHz are used for beam acceleration. In addition, SC single spoke buncher cavities should ensure longitudinal beam matching to the corresponding CH sections. Therefore, the first 217 MHz single spoke cavity with beta 0.07 has been developed at HIM/GSI and built at an industrial partner. In this paper the design of the cavity and first RF measurements during manufacturing are presented.}}, }