Since the initial development of charged particle colliders in the middle of the 20th century,
these advanced scientific instruments have been at the forefront of scientific discoveries in …

Abstract At the Large Hadron Collider (LHC), absolute luminosity calibrations obtained by
the van der Meer (vdM) method are affected by the mutual electromagnetic interaction of the …

Amplitude detuning measurements in the LHC have shown that a significant amount of
detuning is generated via feed-down from high-order field errors in the magnets of the …

Successful operation of large-scale particle accelerators depends on the precise correction
of magnet field or alignment errors present in the machine. In the Large Hadron Collider …

The main aspects linked to Landau damping of head-tail instabilities at top energy in the HL-
LHC are discussed, in particular the interplay between the arc octupoles and long-range …

Operation of particle accelerators and correction of unavoidable magnet or alignment errors
critically depend on the assessment of both global and local observables such as tune or …

Optics control in the HL-LHC will be challenged by a very small β* of 15 cm in the two main
experiments. HL-LHC physics fills will keep a constant luminosity during several hours via β …

Optics Measurement and Correction Strategies for HL-LHC Page 1 CERN-ACC-2022-0004
22/01/2024 CERN-ACC-2022-0004 . rogelio.tomas@cern.ch Optics Measurement and …

Nonlinear magnetic errors in low-β insertions can have a significant impact on the beam-
dynamics of a collider, such as the CERN Large Hadron Collider (LHC) and its luminosity …

Landau damping of coherent modes is strongly dependent on the exact shape of the particle
bunches. One often assumes that the transverse distributions in high-energy hadron …