Modelling and measurements of bunch profiles at the LHC

[摘要] The bunch profiles in the LHC are often observed to be non-Gaussian, both at Flat Bottom (FB) and Flat Top (FT) energies. Especially at FT, an evolution of the tail population in time is observed. In this respect, the Monte-Carlo Software for IBS and Radiation effects (SIRE) is used to track different types of beam distributions. The impact of the distribution shape on the evolution of bunch characteristics is studied. The results are compared with observations from the LHC Run 2 data.

[发布机构] CERN, Geneva, Switzerland^1;Institute of Theoretical and Computational Physics (ITCP), Crete, Greece^2;Department of Physics, University of Liverpool, United Kingdom^3;Fermi National Accelerator Laboratory, Batavia; IL; 60510, United States^4

[关键词] Beam distribution;Distribution shapes;Flat-top;Measurements of;Non-Gaussian