Dortmund 2021 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 3: Radiofrequency

AKBP 3.8: Vortrag

Dienstag, 16. März 2021, 15:45–16:00, AKBPb

Refurbishment of a spare cryomodule for MESA* — •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-call TESLA/XFEL-type cavities. In the cryomodule the superconducting cavities are cooled down to 2 Kelvin with liquid helium. For any maintenance work at the cavities, it is necessary to disassemble the cryomodule. This includes to remove the cavities from the cold string. Smallest impurities can lead to big dercrease of the quality factor of the cavity, which reduces the achievable beam energy of the accelerator. That is why the disassembling and the later reassembling of the cryomodule must be done under very clean conditions which is provided in clean rooms. The plans of disassembling one cryomodule and cleaning the cavities are presented. For that project a spare module of the disassembled ALICE ERL at Daresbury, UK will be used.

* 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.