• K. Hanke, C. Carli, R. Garoby, F. Gerigk, A.M. Lombardi, S. Maury, C. Rossi, M. Vretenar
  CERN, Geneva

The con­struc­tion of Linac4, a 160 MeV H^- Linac, is the first step in up­grad­ing the LHC in­jec­tor chain. Un­like CERN's pre­sent in­jec­tor linac, Linac4 will in­ject into the sub­se­quent syn­chrotron via charge ex­change in­jec­tion. In a first stage, it will in­ject into the ex­ist­ing CERN PS Boost­er. At a later stage, Linac4 has the op­tion to be ex­tend­ed by a su­per­con­duct­ing linac (SPL) which could then in­ject into a new syn­chrotron (PS2). Con­struc­tion of Linac4 has start­ed in 2008, and beam op­er­a­tion is present­ly planned for 2014. An overview of the Linac4 main pa­ram­e­ters and de­sign choic­es is given, and the sta­tus of the con­struc­tion re­port­ed.