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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 16: Posters

AKBP 16.5: Poster

Donnerstag, 19. März 2020, 16:30–18:00, P1C

Simulation of ion motion and dynamics in particle accelerator ELSA — •Anthony Francis John Benedict, Shahnam Gorgi Zadeh, Dirk Hecht, and Ursula van Rienen — University of Rostock, Albert Einstein Str.2, 18109 Rostock, Germany

In particle accelerators, ions are generated by the interaction of the particle beam with the residual gas by direct collision or by synchrotron radiation. The generated particles get trapped by the attractive potential of the particle beam and cause negative effects such as tune shift and beam instabilities. If left unchecked, the ions can cause the beam quality to deteriorate and even lead to neutralization of the particle beam. To mitigate the negative effects of the accumulated ions, ion clearing methods such as clearing electrodes are employed. To optimize the use of adequate clearing methods, the ion motion and dynamics in various beamline elements must be investigated. Numerical methods such as Particle in Cell (PIC) simulations are employed to study the motion of ions in the presence of electromagnetic fields. In this contribution, the generation, accumulation, and clearance of ions in the beamline elements of the high energy storage ring (HESR) of particle accelerator ELSA (Elektronen Stretcher Anlage) are studied. The space-charges are studied using the finite element method (FEM). The effects of electromagnetic fields in radiofrequency (RF) cavities on ion motion are studied. An estimation of clearing current at the clearing electrodes is also carried out.

This research is funded by the Bundesministerium für Bildung und Forschung (BMBF) under contract 015K16HRA.