Chapter 13: Beam instrumentation and long-range beam–beam compensation

The extensive array of beam instrumentation with which the LHC is equipped has played a major role in its commissioning, rapid intensity ramp-up and safe and reliable operation. Much of this equipment will need consolidation by the time the LHC enters the High-Luminosity (HL) era, while the upgrade itself brings a number of new challenges. The installation of a completely new final focus system in the two high-luminosity LHC insertions implies the development of new beam position monitors to equip the upgraded quadrupole magnets. As well as replacing the 10 current beam position monitors, six additional beam position monitors will be added per interaction region, to further improve beam control at the collision point.