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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 8: Radiofrequency Systems 2 – Superconductivity

AKBP 8.3: Vortrag

Dienstag, 29. März 2022, 16:30–16:45, AKBP-H14

Surface preparation on niobium TESLA cavities for MESA at the HIM* — •Paul Plattner, Florian Hug, and Timo Stengler — Institut für Kernphysik , Johannes Gutenberg-Universität Mainz

The Mainz Energy-Recovering Superconducting Accelerator (MESA) will be a new recirculating accelerator, which can operate in an external beam mode and an energy recovering mode. In the ERL-mode the electrons cross an internal gas-target at MAGIX and give their kinetic energy into the Superconducting Radio Frequency (SRF) system back after experimental use. The MESA cryomodules are based on ELBE-type cryomodules, which contain two 9-cell TESLA/XFEL-type cavities. In the cryomodule the superconducting cavities are cooled down to 1.8 Kelvin with liquid helium. For maintenance of the cryomodules can be used the clean room infrastructure at the Helmholtz Institute Mainz (HIM). Currently a cryomodule from the ALICE ERL at Daresbury, UK is in the process of refurbishment. So, the current progress can be shown. A superconducting 3 GHz six-cell injector cavity for the S-DALINAC was used to demonstrate that the treatment of a high pressure rinse in the clean room infrastructure at HIM was successful. * This work has been supported by DFG through the PRISMA+ cluster of excellence EXC 2118/2019. The authors acknowledge the transfer of one cryomodule to Mainz by STFC Daresbury.