Report from the WG-2 of the LUMI-05 workshop scenarios for the injector complex upgrade

The LUMI-05 workshop was held in Arcidosso (Italy) from August 31st to September 3rd, gathering about 40 participants. The scope of the workshop was to explore scenarios for the LHC luminosity upgrade, with particular emphasis on LHC IR layouts with lower β* and on new high energy injectors for increasing the beam intensity. These topics were discussed by two separate working groups, the first one (WG-1) mainly dealing with the LHC IR Upgrade, and the second one (WG-2) on High Energy Injectors. This note reports about activities and conclusions of WG-2.