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TY - CONF AU - Belli, E. AU - Castorina, G. AU - Migliorati, M. AU - Novokhatski, A. AU - Persichelli, S. AU - Spataro, B. AU - Zobov, M. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Coupling Impedances and Collective Effects for FCC-ee J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - A very important issue for the Future Circular Collider (FCC) is represented by collective effects due to the self-induced electromagnetic fields, which, acting back on the beam, could produce dangerous instabilities. In this paper we will focus our work on the FCC electron-positron machine: in particular we will study some important sources of wake fields, their coupling impedances and the impact on the beam dynamics. We will also discuss longitudinal and transverse instability thresholds, both for single bunch and multibunch, and indicate some ways to mitigate such instabilities. PB - JACoW CP - Geneva, Switzerland SP - 3734 EP - 3737 KW - impedance KW - vacuum KW - collective-effects KW - coupling KW - collider DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-THPAB020 UR - http://jacow.org/ipac2017/papers/thpab020.pdf ER -