Alternative/complementary possibilities

Schemes aiming at increasing the brightness of LHC proton beams available from the PS complex by means alternative or complementary to the standard upgrade path defined after the 2010 Chamonix workshop, based on Linac4 and an upgrade of the PSB to PS transfer energy, are investigated. Compression of batches in the PS after acceleration to an appropriate intermediate energy allows increasing the beam brightness by reducing the length of the batch provided by the PS and thus distributing the available intensity to a smaller number of bunches. Furthermore a study of short Rapid Cycling Synchrotron (RCS) as new PS injector is proposed. The short circumference of one seventh of the PS is on the one hand suitable to reach high beam brightness required and for transfer to the PS. On the other hand the target kinetic energy of 2.0 GeV is a challenging goal.