The CERN PS complex as part of the LHC injector chain

The delivery of a beam with characteristics appropriate to the filling of the LHC (Large Hadron Collider) proton-proton collider requires that the CERN PS complex provide a beam whose transverse particle density exceeds, by a factor of three, the highest currently attained. The beam dynamics operations and the associated hardware modifications which would be required to achieve this goal are considered. The approach favored involves filling the Proton Synchrotron (PS) with two pulses from the Proton Synchrotron Booster (PSB) and requires and RF quadrupole (RFQ2) as a preinjector for the linac (LINAC2), an increase of the PSB extraction energy and additional RF systems, both in the PSB and PS.<>