CERN, Geneva
The PS2, foreseen as a replacement of the CERN PS, is designed as a racetrack shaped machine with two long straight sections (LSS) for injection/extraction and RF, respectively. Two injection and three extraction systems are required, and in the present study are designed to fit in either a six-cell FODO or a seven-cell DOFO insertion, with a central triplet in order to fit the complete H- injection in one long drift. This study covers the optimisation of the LSS optics and the arrangement and characteristics of the various insertion elements. The main focus lies on the H- injection embedded in the triplet cell with the design of the chicane and painting bump according to the limits of Lorentz-stripping, excited H0 behaviour and the focusing effects of the chicane dipoles on the overall optics.
CERN, Geneva
The Large Hadron Collider (LHC) will collide two protons beam with an energy of 7 TeV each. The stored energy and intensity exceeds the quench level of the superconducting magnets and the damage level of the machine components by far. Therefore a robust and reliable collimation system is required which controls the losses to the superconducting magnets below the quench limit and to protect the accelerator components from damage in the event of beam loss. The layout and design of the LHC collimation system is presented and the expected system performance is shown. The calculated losses around the ring were provided as input for energy deposition studies in the cleaning insertions itself but also close to experimental insertions. In addition the results from studies on proton losses originating from p-p interaction in the experiments are shown.
