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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: Radiofrequency

AKBP 2.4: Vortrag

Montag, 16. März 2020, 15:45–16:00, GÖR 226

Microphonics Measurement and Compensation at MESA* — •Anna Kujawa, Florian Hug, and Timo Stengler — JGU Mainz, Institut für Kernphysik

A new electron accelerator called MESA is currently under construction at the Institute for Nuclear Physics at the Johannes Gutenberg-University Mainz. MESA stands for Mainz Energy Recovering Superconducting Accelerator and is going to be used to perform precision tests on the Standard Model at low energies. The centrepieces of the accelerator are two superconducting modified ELBE-type modules, the so-called cryomodules. In order to accelerate electron bunches, resonant fields of 1.3GHz are induced into the cavities resulting in standing waves. Since its bandwidth of 100 Hz is rather narrow, the resonance reacts promptly to any external vibrations giving rise to troubles guaranteeing a stable beam. These external vibrations are called microphonics. This talk presents measurements of microphonic effects on one of the cryomodules and future improvements to minimize external disturbance. Furthermore, a measurement of the full set of the cavities' resonance frequencies in a normal conducting environment is presented.

* This work has been supported by DFG through the PRISMA+ cluster of excellence EXC 2118/2019 and by the European Union's Horizon 2020 Research and Innovation programme under Grant Agreement No 730871.