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Linear Accelerator Designs for the Upgrade of the CERN Proton Injector Complex (Linac4, SPL)
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- M. Vretenar, G. Bellodi, R. Garoby, F. Gerigk, K. Hanke, A. M. Lombardi, S. Maury, M. Pasini, C. Rossi, E. Zh. Sargsyan
CERN, Geneva
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Looking beyond the commissioning of the LHC, which is expected to start at the end of 2007, CERN is setting up its scientific plan for the years to come. The concerns about the reliability of the old LHC injectors and the need to progressively remove the technical bottlenecks towards higher luminosity in the LHC have initiated a reflection on the design of the main elements of the LHC injection chain. A plan under consideration foresees in the years 2007-2010 the construction of a 160 MeV H− linear accelerator, Linac4, injecting into the old 1.4 GeV PS Booster (PSB). In a second stage, the PSB could be replaced by a superconducting linac, the SPL, at an energy between 3.5 and 5 GeV. The Proton Synchrotron (PS) would be in turn replaced by a new PS2 reaching a higher energy of 50 GeV. Linac4 and SPL can operate at a higher duty cycle than needed for LHC injection, allowing functioning as a high-intensity facility for neutrino or radioactive ion physics at a later stage. This paper describes the design of the two linear accelerators involved in this upgrade strategy, Linac4 and SPL, and outlines some results of the R&D programme aimed at preparing the construction of Linac4.
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