Apr 9 – 13, 2018
Beurs van Berlage
Europe/Zurich timezone

Two beam stability and Landau damping

Apr 12, 2018, 4:10 PM
P4 Berlage zaal (1.9)

P4 Berlage zaal


Board: 4AMS16C
EuroCirCol FCC-hh accelerator


Claudia Tambasco (EPFL - Ecole Polytechnique Federale Lausanne (CH))


In proton colliders, Landau octupoles are used to provide the necessary Landau damping of transverse coherent beam instabilities driven by the impedance. During the operational cycle the tune spread provided by the Landau octupoles may be modified when in presence of beam-beam interactions. Transverse beam stability studies for the FCC-hh operational cycle will be explored using Landau octupoles alone and in presence of beam-beam long range and head-on interactions. In addition, the possibility to use an electron lens to provide the necessary tune spread for beam stability will be analysed and compared to the octupole magnets case. Based on these studies an optimum operational scenario will be proposed to guarantee the maximum stability during the entire FCC-hh operational cycle.

Primary author

Claudia Tambasco (EPFL - Ecole Polytechnique Federale Lausanne (CH))


Dr Tatiana Pieloni (EPF Lausanne) Javier Barranco Garcia (EPFL - Ecole Polytechnique Federale Lausanne (CH)) Xavier Buffat (CERN) Sergey Arsenyev (CERN) Daniel Schulte (CERN) Barbara Dalena (Université Paris-Saclay (FR))

Presentation materials