Systems Layout of the Low-$\beta$ Insertions for the LHC Experiments

The LHC experimental insertions consist of a low-beta triplet, a pair of separation dipoles, and a matching section of four quadrupoles. The superconducting low-beta quadrupoles must accommodate separated beams at injection, provide high field gradients and low multipole errors for colliding beams, and sustain considerable heat load from secondary particles generated in the high luminosity ATLAS and CMS experiments. In the other two proposed experiments, ALICE and LHCb, the separation dipoles and matching sections share the available space with the injection equipment. In this report we present the systems layout of the experimental insertions for the LHC, and review the requirements for the superconducting magnets.