Barth, W.A. Aulenbacher, K. Basten, M. Busch, M. Dziuba, F.D. Gettmann, V. Heilmann, M. Kürzeder, T. Miski-Oglu, M. Podlech, H. Rubin, A. Schnase, A. Schwarz, M. Yaramyshev, S. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-TU2A01 English 297-302 TU2A01 cavity linac heavy-ion acceleration emittance Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-TU2A01 http://jacow.org/linac2018/papers/tu2a01.pdf First acceleration of heavy ion beams with a superconducting continuous wave HIM/GSI CW-Linac After successful RF-testing of a new superconducting Linac RF-cavity at GSI Helmholtzzentrum für Schwerionenforschung and a short commissioning and ramp up time of some days, this 15-gaps Crossbar H-cavity accelerated first time heavy ion beams with full transmission up to the design beam energy. The design acceleration gain of 3.5 MV inside a length of less than 70 cm has been verified with heavy ion beam of up to 1.5 particle mkA. The measured beam parameters show a nice beam quality. The machine commissioning with beam is a milestone of the R&D work of Helmholtz Institute Mainz and GSI in collaboration with Goethe University Frankfurt in development of the superconducting heavy ion continuous wave linear accelerator CW-Linac.