Mitigation of the impedance-related collective effects in FCC-ee
In order to achieve a high luminosity in the electron-positron Future Circular Collider (FCC-ee), very intense multi-bunch beams with low emittances are accumulated in two separate rings and collide in two interaction regions exploiting the crab waist collision scheme. In order to preserve beam quality and to avoid collider performance degradation a careful study of beam collective effects is required. In this paper we overview impedance related coherent beam effects and instabilities potentially dangerous for FCC-ee and discuss measures and techniques for their mitigation.
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