CERN Accelerating science

Preprint
Report number	arXiv:2404.09012
Title	Impact of bunch intensity asymmetry in colliders featuring strong beamstrahlung
Author(s)	Le Nguyen Nguyen, Khoi (CERN ; EPFL-ISIC, Lausanne ; Cambridge U.) ; Buffat, Xavier (CERN) ; Kicsiny, Peter (CERN ; EPFL-ISIC, Lausanne) ; Pieloni, Tatiana (EPFL-ISIC, Lausanne)
Publication	25 p.
Imprint	2024-04-13. - 25 p.
Note	25 pages, 13 figures
Subject category	physics.acc-ph ; Accelerators and Storage Rings
Abstract	An analytical investigation of beamstrahlung-induced blow-up in Gaussian beams with arbitrary dimensions is presented, using various approximations for the strength of the hourglass effect and crab waist scheme. The results, applied to the FCC-ee resonances, are compared with simulations and previous calculations, and relative luminosity values are also calculated. The stability of resultant conformations are analysed to rule out the existence of a flip-flop phenomenon in the longitudinal plane analogous to the well-known transverse counterpart. Implications for the top-up injection procedures are discussed, and a phenomenological model is proposed to study the transverse-longitudinal coupling in the blowup dynamics.
Other source	Inspire
Copyright/License	preprint: (License: CC BY 4.0)