• W.J.M. Weterings, M. Aiba, J. Borburgh, C. Carli, T. Fowler, B. Goddard
  CERN, Geneva

For the LINAC4 project the PS Booster (PSB) injection system will be upgraded. The 160 MeV H^- beam will be distributed to the 4 superimposed PSB synchrotron rings and horizontally injected by means of an H^- charge-exchange system. Operational considerations for the injection system are presented, including expected beam losses from field stripping of H^- and excited H0 and foil scattering, possible injection failure cases and expected stripping foil lifetimes. Loading assumptions for the internal beam dumps are discussed together with estimates of doses on various components.

• B. Goddard, I.V. Agapov, E. Carlier, L. Ducimetière, E. Gallet, M. Gyr, L.K. Jensen, O.R. Jones, V. Kain, T. Kramer, M. Lamont, M. Meddahi, V. Mertens, T. Risselada, J.A. Uythoven, J. Wenninger, W.J.M. Weterings
  CERN, Geneva

Initial commissioning of the LHC beam dump system with beam took place in August and September 2008. The preparation, setting-up and the tests performed are described together with results of the extractions of beam into the dump lines. Analysis of the first detailed aperture measurements of extraction channels and kicker performance derived from dilution sweep shapes are presented. The performance of the other equipment subsystems is summarised, in particular that of the dedicated dump system beam instrumentation.

• C. Carli, M. Aiba, M. Chanel, B. Goddard, M. Martini, W.J.M. Weterings
  CERN, Geneva

The motivation for the construction of CERN Linac4 is to improve the performance of the PSB by raising the injection energy and implementing a new H^- charge exchange multiturn injection scheme. Strategies to design the H^- charge exchange injection hardware and, in particular, to mitigate perturbations of the lattice will be reported and the proposed geometry described.

• C. Heßler, R.W. Assmann, B. Goddard, M. Meddahi, W.J.M. Weterings
  CERN, Geneva

The LHC phase II collimation project requires beam shock and impact tests of materials used for beam intercepting devices. Similar tests are also of great interest for other accelerator components such as beam entrance/exit windows and protection devices. For this purpose a dedicated High Radiation Material test facility (HiRadMat) is under study. This facility may be installed at CERN at the location of a former beam line. This paper describes the associated beam line which is foreseen to deliver a 450 GeV proton beam from SPS with an intensity of up to 3·10¹³ protons per shot. Different beam line designs will be compared and the choice of the beam steering and diagnostic elements will be discussed, as well as operational issues.