The Superconducting Super Proton Synchrotron

In order to continue pushing the frontiers of high energy physics, a future circular hadron collider, FCC-$hh$ has been proposed. Using 16 T magnets the FCC-$hh$ will be able to collide two beams of hadrons with a centre-of-mass energy of order 100 TeV. In doing so it is hoped that FCC-$hh$ will shed light on some of the mysteries of modern particle physics, in particular the nature of the Higgs potential and the Standard Model of Particle Physics as well as what may lie beyond. An important consideration for the design of the FCC-$hh$ is the series of accelerators that will be used to inject the hadron beams into the collider. The FCC-$hh$ requires a high energy injector. One possible machine to be used for this purpose is the superconducting Super Proton Synchrotron, scSPS. The scSPS is a new superconducting accelerator that will be built in the same tunnel as the normal-conducting, Super Proton Synchrotron, SPS. The scSPS will be able to accelerate proton beams to an energy of 1.3 TeV, nearly three times as high as the SPS, for extraction to either the FCC-$hh$ or to fixed target experiments. This report details the results of a design study for such an upgrade with a focus on the lattice design, magnet design and RF cavity design. A recommended design for a dispersion suppressor is discussed and the cell dimensions optimised to fit in the existing SPS tunnel. Preliminary designs for the magnets are proposed. Three superconducting designs are proposed for both the dipole and quadrupole magnets. These designs provide the freedom to operate the scSPS at 4.2 K with double-layered magnets and 1.9 K with single layered magnets. The design of both superconducting and normal-conducting sextupole magnets for chromaticity corrections have also been produced. A superconducting RF cavity design is also presented, requiring state-of-the-art high bandwidth and fast tuners.