CERN Accelerating science

Article
Report number	arXiv:1904.10306
Title	Beam-beam Blowup in the presence of x-y coupling sources at FCC-ee
Author(s)	El Khechen, Dima (CERN) ; Oide, Katsunobu (CERN ; KEK, Tsukuba) ; Zimmermann, Frank (CERN)
Publication	2019-04-21
Imprint	2019-04-23
Number of pages	4
In:	10.18429/JACoW-eeFACT2018-TUYBA03
In:	62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.TUYBA03
DOI	10.18429/JACoW-eeFACT2018-TUYBA03
Subject category	physics.acc-ph ; Accelerators and Storage Rings
Abstract	FCC-ee, the lepton version of the Future Circular Collider (FCC), is a 100 Km future machine under study to be built at CERN. It acquires two experiments with a highest beam energy of 182.5 GeV. FCC-ee aims to operate at four different energies, with different luminosities to fulfil physics requirements. Beam-beam effects at such a high energy/luminosity machine are very challenging and require a deep understanding, especially in the presence of x-y coupling sources. Beam-beam effects include the beamstrahlung process, which limits the beam lifetime at high energies, as well as dynamic effects at the Interaction point (IP) which include changes in the beta functions and emittances. In this report, we will define the beam-beam effects and their behaviours in the FCC-ee highest energy lattice after introducing x-y coupling in the ring.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0) publication: (License: CC-BY-3.0)

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