Tune and space charge studies for high-brightness and high-intensity beams at CERN PS

The current 1.4 GeV CERN PS injection energy limits the maximum intensity required by the future High- Luminosity LHC. The bare-machine large chromaticity combined with the non-linear space charge forces make high-brightness and high-intensity beams cross betatron resonances along the injection flat bottom, inducing transverse emittance blow-up and beam losses. A scan of the working point plane (Qx,Qy) was done in order to identify beam destructive resonances, in the framework of a possible 2 GeV injection energy upgrade which would reduce the space charge effect on the tune. Experiments were carried out in order to review the maximum space charge tune shift for which no transverse emittance blow-up is observed. The results of measurements and simulations will be presented in this paper.