Since 2015 the LHC has been operating at 6.5 TeV. In 2016 the β-functions at the interaction
points of ATLAS and CMS were squeezed to 0.4 m. This is below the design β*= 0.55 m at 7 …

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 …

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 …

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 …

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 …

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 …

Diagnostics of nonlinear beam dynamics has become more important for the LHC as it
advances into increasingly challenging regimes of operation, as well as for the High …

The European Strategy Group for High Energy Physics recommends to study collider
designs for the post-LHC era. Among the suggested projects there is the circular 100 TeV …