Determining a model for the time scaling of the dynamic aperture of a circular accelerator is
a topic of strong interest and intense research efforts in accelerator physics. The motivation …

Simulation work during LHC Run 1 established that linear coupling had a large impact on
nonlinear observables such as amplitude detuning and dynamic aperture. It is generally …

In this paper, the experimental results of the recent dynamic aperture at top energy for the
CERN Large Hadron Collider are analysed by means of a diffusion model whose novelty …

Studies of nonlinear errors in LHC experimental insertions (IRs) in Run 1 were based upon
feed-down to tune and coupling from crossing angle orbit bumps. Useful for validating the …

In this paper, we review diffusion phenomena in stochastically perturbed Hamiltonian
systems, with the aim of defining the framework to use Nekhoroshev-like estimates as …

Throughout the LHC's first and second operational runs, increasing emphasis has been
placed on the study of nonlinear single-particle beam dynamics. Of particular interest is the …

In this research, a spatial electron beam scanning is reported. There are various methods for
ion and electron beam scanning. The best known of these methods is the wire scanning …

For a second year in a row dynamic aperture experiments have been performed at the LHC.
These studies have been carried out by two teams following alternative techniques: On …

In view of improving the understanding of the behaviour of the dynamic aperture and to
benchmark the numerical simulations performed so far, two experimental sessions have …

Nonlinear errors in experimental insertions can pose a significant challenge to the
operability of low-β∗ colliders. Previously such errors in the LHC have been studied via their …