München 2019 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 9: Electron Accelerators
AKBP 9.7: Vortrag
Dienstag, 19. März 2019, 18:00–18:15, HS 7
Investigation on the Ion-Clearing Performance of Multi-Purpose Electrodes planned for bERLinPro — Gisela Pöplau1, •Atoosa Meseck2, Fjodor Falkenstern2, and Michael Markert2 — 1Universität zu Lübeck, Lübeck, Germany — 2Helmholtz-Zentrum Berlin, Berlin, Germany
High-brightness electron beams provided by modern accelerators require several measures to preserve their high quality and to avoid instabilities. The mitigation of the impact of residual ions is one of these measures. It is particularly important if high bunch charges in combination with high repetition rates are aimed for. This is because ions can be trapped in the strong negative electrical potential of the electron beam causing emittance blow-up, increased beam halo and longitudinal and transverse instabilities.
One ion-clearing strategy is the installation of clearing electrodes. Of particular interest in this context is the performance of multi-purpose electrodes, which are designed such that they allow for a simultaneous ion-clearing and beam-position monitoring. Such electrodes will be installed in the bERLinPro facility.
In this contribution, we present numerical studies of the performance of multi-purpose clearing-electrodes planned for bERLinPro, i.e. we investigate the behavior of ions generated by electron bunches while passing through the field of the electrodes. Hereby, several ion species and configurations of electrodes are considered.