Measurement and correction of charged particle beam optics have been a major concern
since the advent of strong focusing synchrotron accelerators. Traditionally, particle colliders …

Optics stability during all phases of operation is crucial for the LHC. Tools and procedures
have been developed for rapid checks of beta beating, dispersion, and linear coupling, as …

Abstract Operation of the Large Hadron Collider (LHC) requires strong octupolar magnetic
fields to suppress coherent beam instabilities. The amplitude detuning that is generated by …

In circular machines, nonlinear dynamics can impact parameters such as beam lifetime and
could result in limitations on the performance reach of the accelerator. Assessing and …

In 2017, optics commissioning strategy for low-β* operation of the CERN Large Hadron
Collider (LHC) underwent a major revision. This was prompted by a need to extend the …

In 2017, optics commissioning strategy for low-β∗ operation of the CERN Large Hadron
Collider (LHC) underwent a major revision. This was prompted by a need to extend the …

In this paper, results concerning the phenomenon of adiabatic trapping into resonance for a
class of quasi-integrable maps and Hamiltonians with a time-dependent exciter are …

Recently, resonance driving terms were successfully measured in the CERN SPS and the
BNL RHIC from the Fourier spectrum of beam position monitor (BPM) data. Based on these …

ac dipoles in accelerators are used to excite coherent betatron oscillations at a drive
frequency close to the tune. If the excitation amplitude is slowly increased to the desired …

Beam lifetime in storage rings and colliders is affected by, among other effects, lattice
nonlinearities. Their control is of great benefit to the dynamic aperture of an accelerator …