Göttingen 2025 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 12: Radiofrequency and Instrumentation I

AKBP 12.2: Vortrag

Freitag, 4. April 2025, 09:15–09:30, ZHG004

Development of a new Chopper Cavity for the S-DALINAC* — •Vincent Pruy, Michaela Arnold, Adrian Brauch, Manuel Dutine, Ruben Grewe, Katharina E. Ide, Lars Jürgensen, Clemens M. Nickel, Norbert Pietralla, Felix Schliessmann, and Dominic Schneider — Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany

The operation of the superconducting radio-frequency cavities of the S-DALINAC relies on a bunched electron beam. Currently, the continuous beam generated by the thermionic gun is divided into bunches using a chopper system incorporating a single deflecting cavity. However, this system induces nonlinear curvatures to the beam trajectory. To mitigate this effect, a second, identically constructed deflecting cavity can be employed to re-bend the beam thus counteracting the nonlinear distortions. This work focuses on an excellent deflection behavior and quality factor of the cavity by performing electromagnetic and particle tracking simulations. In this contribution, we report on the progress in the simulation and design of such a double-cavity chopper system.
*Work supported by DFG (GRK 2128, IRTG 2891) and State of Hesse (Research Cluster ELEMENTS (Project ID 500/10.006)).

Keywords: Chopper; Cavity; RF; Simulation; S-DALINAC